A chip sealing dam preparation method, device, equipment and medium

Abstract

The present invention relates to the field of chip packaging technology, and discloses a chip sealing dam preparation method, device, equipment and medium, the method comprising: obtaining dam parameters, and determining multiple target edges and multiple target angles according to the dam parameters; controlling the print head to rotate to a preset starting position; controlling the loading mechanism to rotate, so that the plane where the print head is located is perpendicular to the multiple target edges in turn, and moving the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam; controlling the loading mechanism to rotate, so that the print head and the midlines of the multiple target angles are in the same plane in turn, and moving the print head according to the second preset trajectory requirement to complete the printing of the target angles in the dam. The present invention realizes the sealing printing of the dam inside the sample wall by printing the edges and corners of the dam separately to finally form a closed structure, and has a good sealing effect, and is suitable for stacked printing of different dam heights, and is more flexible and space-saving, meeting the high-density, small-size dam sealing requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of chip packaging, and in particular to a method, device, equipment and medium for preparing a chip sealing dam. Background Art

[0002] In the field of electronic packaging, it is often necessary to construct a sealed cavity in some specific scenarios, and the purpose of selective sealing can be achieved with the mold. At present, in the back-end bottom filling process in the RF module, it is necessary to ensure that the filling glue does not enter the hollow area to avoid affecting the chip and packaging structure in the middle. The traditional dam solution pastes prefabricated metal structural parts on the edge of the target area, and then uses glue dispensing to fill the gap between the metal structural parts and the patch structure to form an isolation dam. However, the setting of metal structural parts will increase the size of the chip packaging structure, resulting in the inability to meet the high-density and small-size packaging requirements. There is currently no good method for preparing the inner dam. Summary of the invention

[0003] In view of this, the present invention provides a chip sealing dam preparation method, device, equipment and medium to solve the problem that the existing chip sealing dam technology cannot meet the requirements of high-density and small-size packaging.

[0004] In a first aspect, the present invention provides a method for preparing a chip sealing dam, wherein a printing material is extruded from a printing head to form a dam on the inner side of a sample wall on a loading mechanism, the method comprising:

[0005] Obtaining dam parameters, and determining multiple target edges and multiple target angles according to the dam parameters;

[0006] Control the print head to rotate to a preset starting position;

[0007] Controlling the loading mechanism to rotate, sequentially making the multiple target edges perpendicular to the plane where the print head is located, and moving the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam;

[0008] The loading mechanism is controlled to rotate, so that the center lines of the multiple target angles and the print head are in the same plane in turn, and the print head is moved according to the second preset trajectory requirement to complete the printing of the target angles in the dam.

[0009] The chip sealing dam preparation method provided by the present invention realizes the sealing printing of the dam inside the sample wall by printing the edges and corners of the dam respectively to finally form a closed structure, so as to achieve good sealing effect and be suitable for stacked printing of different dam heights. The printing is more flexible and space-saving, and meets the high-density and small-size dam sealing requirements.

[0010] In an optional implementation, moving the print head according to the first preset trajectory requirement to complete printing of the target edge in the dam includes:

[0011] Determine the height of the dam according to the dam parameters, and determine the number of printing layers according to the dam height and the preset layer height;

[0012] If the number of printing layers is 1, the printing start point and the printing end point of the target edge are determined according to the first preset offset distance and the second preset offset distance, and the print head is controlled to perform a single printing of the target edge from the printing start point to the printing end point, the first preset offset distance being the vertical distance between the printing start point of the target edge and the corresponding sample wall edge, and the second preset offset distance being the vertical distance between the printing start point of the target edge and the corresponding sample wall edge of the adjacent target edge;

[0013] If the number of printing layers is greater than 1, the printing start point and the printing end point corresponding to each printing layer of the target edge are determined according to the first preset offset distance and the second preset offset distance, and the print head is controlled to perform reciprocating printing between the printing start point and the printing end point corresponding to each printing layer.

[0014] In an optional implementation, controlling the print head to perform reciprocating printing between a printing start point and a printing end point corresponding to each printing layer includes:

[0015] The printing of each layer is completed from the printing starting point to the printing end point in the order of increasing distance from the loading mechanism plane;

[0016] The distance between the printing start point of the current layer and the printing end point of the previous layer is the lifting height between each layer.

[0017] The chip sealing dam preparation method provided by the present invention realizes multi-layer edge printing through reciprocating motion. The high dam occupies little space and can meet the high-density and small-size packaging requirements. When printing the target edge, two offset distances from the sample wall are set to avoid collision between the print head and the sample wall to damage the print head, thereby improving the safety of the printing process and ensuring the accuracy and integrity of the edge printing.

[0018] In an optional implementation, moving the print head according to the second preset trajectory to complete printing of the target angle in the dam includes:

[0019] Determine the height of the dam according to the dam parameters;

[0020] If the number of printing layers is 1, a single print is performed according to the position of the target corner;

[0021] If the number of printing layers is greater than 1, the print head is controlled to perform lifting printing according to the position of the target corner and the height of the dam.

[0022] In an optional implementation, the position of the target angle and the height of the dam control the print head to perform lifting printing, including:

[0023] Determine the lifting start point and lifting end point of the print head according to the position of the target angle and the height of the dam;

[0024] Control the print head to move to the lifting starting point and discharge the material at the preset time;

[0025] According to the preset material discharging speed and print head moving speed, the print head is controlled to perform lifting printing from the lifting starting point to the lifting ending point.

[0026] The chip sealing dam preparation method provided by the present invention is suitable for single-layer or multi-layer printing, meets the printing requirements of different dam heights, saves space for high dams, and adopts a lifting and discharging method for corner printing to achieve sealing filling of connected edges and improve the sealing of the dam.

[0027] In an optional implementation, controlling the loading mechanism to rotate, sequentially making multiple target edges perpendicular to the plane where the print head is located, moving the print head according to the first preset trajectory requirement, and completing the printing of the target edges in the dam, includes:

[0028] Controlling the rotation of the loading mechanism so that the initial target edge is perpendicular to the plane where the print head is located, and calculating the rotation angles of the remaining target edges relative to the initial target edge;

[0029] According to the rotation angles of the remaining target edges relative to the initial target edge, the remaining target edges are sorted from small to large to obtain an edge sorting result;

[0030] According to the edge sorting result, the remaining target edges are sequentially made perpendicular to the plane where the print head is located, and the print head is moved according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

[0031] In an optional embodiment, the target angle is not less than 90°, the loading mechanism is controlled to rotate, the midlines of the multiple target angles are sequentially placed in the same plane with the print head, the print head is moved according to the second preset trajectory requirement, and the printing of the target angle in the dam is completed, including:

[0032] Controlling the rotation of the loading mechanism so that the center line of the initial target angle and the print head are in the same plane, and calculating the rotation angles of the center lines of the remaining target angles relative to the center line of the initial target angle;

[0033] According to the rotation angles of the remaining target angle midlines relative to the initial target angle midline, the remaining target angles are sorted from small to large to obtain an angle sorting result;

[0034] According to the angle sorting result, the midlines of the remaining target angles are sequentially placed in the same plane as the print head, and the print head is moved according to the second preset trajectory to complete the printing of the target angles in the dam.

[0035] The chip sealing dam preparation method provided by the present invention can have any shape of the dam, as long as the target angle is not less than 90°, and the adjacent edges are prevented from interfering with the print head, so as to ensure the integrity of the dam and the sealing of the adjacent edges. By calculating the rotation angle between the remaining target edges and the initial target edges, and printing the remaining target edges in order of the rotation angle from small to large, calculating the rotation angle between the remaining target angles and the initial target angle, and printing the remaining target angles in order of the rotation angle from small to large, the total rotation angle of the loading mechanism is minimized, thereby improving the printing efficiency.

[0036] In a second aspect, the present invention provides a chip sealing dam preparation device, wherein a printing material is extruded from a printing head to form a dam on the inner side of a sample wall on a loading mechanism, and the device comprises:

[0037] A parameter acquisition module is used to acquire the dam parameters and determine multiple target sides and multiple target angles according to the dam parameters;

[0038] A print head position initialization module, used to control the print head to rotate to a preset starting position;

[0039] The edge printing module is used to control the rotation of the loading mechanism, so that the multiple target edges are perpendicular to the plane where the print head is located in turn, and the print head is moved according to the first preset trajectory requirement to complete the printing of the target edges in the dam;

[0040] The corner printing module is used to control the rotation of the loading mechanism, so that the midlines of multiple target corners and the print head are in the same plane in turn, and the print head is moved according to the second preset trajectory requirements to complete the printing of the target corners in the dam.

[0041] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the method of the first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0042] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to cause a computer to execute the method of the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1It is a schematic diagram of several existing printing methods for chip sealing inner dam;

[0045] Figure 2 is a schematic flow chart of a method for preparing a chip sealing dam according to an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram of the positions of target edges and target corners in a method for preparing a chip sealing dam according to an embodiment of the present invention;

[0047] Figure 4 is a schematic diagram of the printing effect of the target edge in the chip sealing dam preparation method according to an embodiment of the present invention;

[0048] Figure 5 is a schematic diagram of the printing effect of the target angle in the chip sealing dam preparation method according to an embodiment of the present invention;

[0049] Figure 6 is a schematic diagram of the printing order of target edges of an irregular dam in a method for preparing a chip sealing dam according to an embodiment of the present invention;

[0050] Figure 7 is a schematic flow chart of another method for preparing a chip sealing dam according to an embodiment of the present invention;

[0051] Figure 8 is a schematic diagram of two preset offset distances of a target edge in a chip sealing dam preparation method according to an embodiment of the present invention;

[0052] Fig. 9 is a schematic diagram of the running track of the print head during target edge stacking printing in the chip sealing dam preparation method according to an embodiment of the present invention;

[0053] Fig.10 is a schematic diagram of a preset offset distance for target corner printing in a chip sealing dam preparation method according to an embodiment of the present invention;

[0054] Fig.11 is a schematic diagram of a single-layer printing effect in a specific embodiment of a chip sealing dam preparation method according to an embodiment of the present invention;

[0055] Fig.12 is a structural block diagram of a chip sealing dam preparation device according to an embodiment of the present invention;

[0056] Fig.13 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0058] like Figure 1 As shown in the figure, there are several existing printing methods for chip sealing inner dam. The commonly used sealant dispensing method is vertical dispensing ( Figure 1 As shown in a), there are no requirements for sealing height and line width. The feasibility of sealing the outer dam can be ensured by leaving space for dispensing in the design. However, this method usually wastes a lot of area, so the device density is reduced, and it gradually cannot meet the current requirements of miniaturization and intensive product design. In addition, for the inner dam, since there are usually functional areas in the cavity, it is difficult to leave enough space for filling the sealing glue in the design, and the fluidity of the glue is restricted. If glue with a certain degree of conformality is selected, the wall thickness of the dispensing head will cause the sealing material and the structure to be sealed to be incomplete due to the loose fit between the dam (formed by the sealing material) and the sample wall (structure to be sealed).

[0059] Selecting conformal materials and tilting the print head can ensure that the sealing material fits precisely with the structure to be sealed, but there is a new problem. The printing end point and the printing start point need to be closed to form a complete pattern. Also, due to the thickness of the print head, the morphology of the starting point will inevitably be destroyed when the end point is reached. Sealing cannot be achieved ( Figure 1 If the next adjacent side is printed after the single side is cured, the end point of the cured single side will interfere with the starting point of the next adjacent side, resulting in a gap and still unable to achieve sealing ( Figure 1 On the other hand, the inclined printing dam must have a rotation function for the print head or the bottom support structure, and the bottom rotation area to be processed and the bottom support structure must be located at the same rotation center ( Figure 1 Otherwise, although the angular velocity is the same, the linear velocity of different parts is different, resulting in inconsistent line width, making this method unable to be applied to array products.

[0060] Based on the above problems, an embodiment of the present invention provides a method for preparing a chip sealing dam, by printing the edges and corners of the dam respectively to finally form a closed structure, so as to achieve the effect that the prepared sealing dam meets the requirements of high-density and small-size packaging.

[0061] According to an embodiment of the present invention, an embodiment of a chip sealing dam preparation method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0062] In this embodiment, a chip sealing dam preparation method is provided, which can be used in the above-mentioned computer system. Figure 2 FIG. 1 is a flow chart of a method for preparing a chip sealing dam according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0063] Step S101, obtaining dam parameters, and determining a plurality of target edges and a plurality of target angles according to the dam parameters.

[0064] Specifically, the printing material is extruded from the print head to form a dam inside the sample wall on the loading mechanism. The sample wall is equivalent to the mold of the dam, and the shape of the dam is exactly the same as that of the sample wall, so the sample wall has edges and corners corresponding to the dam, such as Figure 3 As shown, taking a rectangular sample wall as an example, the sample wall is composed of four sides (S1, S2, S3, S4) and four corners (A1, A2, A3, A4), wherein the angle between the first target side S1 and the second target side S2 is the first target angle A1, the angle between the second target side S2 and the third target side S3 is the second target angle A2, the angle between the third target side S3 and the fourth target side S4 is the third target angle A3, and the angle between the fourth target side S4 and the first target side S1 is the fourth target angle A4, which is only taken as an example, but not limited to this. In addition to the target sides and target angles, the dam parameters also include the dam height, width, and the distance between each side and the chip. In this embodiment, the dam height is not greater than the sample wall height, and the dam width and the distance between each side of the dam and the chip can be determined according to actual conditions, as long as the dam packaging requirements are met, which is only taken as an example, but not limited to this.

[0065] In some optional embodiments, the target angle is not less than 90°.

[0066] Specifically, the pattern of the dam is not limited to a rectangle, and any pattern with an inner angle (target angle) not less than 90° can be used. Because the inner angle is less than 90°, two adjacent edges may interfere with the print head when the rotary loading mechanism is printing.

[0067] In the chip sealing dam preparation method provided in this embodiment, the shape of the dam can be any shape, as long as the target angle is not less than 90°, the adjacent edges are prevented from interfering with the print head, and the integrity of the dam and the sealing of the adjacent edges are ensured.

[0068] Step S102, controlling the print head to rotate to a preset starting position.

[0069] Specifically, a suitable preset starting position can be selected in advance by manually moving the print head, which can be a suitable position directly above the printing area, to ensure that the print head does not collide with other objects and to facilitate reaching the printing position from the preset starting position, and the print head starts moving and printing tasks from the preset starting position. When the print head is at the preset starting position, the print head is at an angle of 30° to the vertical direction, and during the entire printing process, the preset starting position and the posture of the print head at the starting position remain unchanged.

[0070] Step S103, controlling the loading mechanism to rotate, sequentially making the multiple target edges perpendicular to the plane where the print head is located, and moving the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

[0071] Specifically, after the print head reaches the fixed preset starting position, for the rectangular dam, the loading mechanism is controlled to rotate so that the plane where the print head is located is perpendicular to the first target side S1, so that when the print head descends to print along the first target side S1, the relative position of the print head and the sample wall side corresponding to the first target side S1 can ensure that the printed material fits the sample wall precisely. According to the first preset trajectory requirement, the print head is controlled to move from the preset starting position to the printing starting point of the first target side S1, and then the material discharge speed of the print head and the movement speed of the print head from the printing starting point to the printing ending point are determined according to the preset printing parameters, and the print head is controlled according to the printing parameters to complete the printing of the first target side S1, and the print head is controlled to return to the preset starting position. After the first target side S1 is printed, the loading mechanism is rotated to make the second target side S2, the third target side S3, and the fourth target side S4 perpendicular to the plane where the print head is located, respectively, and the printing of the remaining second target side S2, the third target side S3, and the fourth target side S4 is completed in the same manner as the printing of the first target side S1, and the following is obtained. Figure 4 The edge printing effect is shown.

[0072] Step S104, controlling the loading mechanism to rotate, sequentially making the center lines of the multiple target angles and the print head in the same plane, moving the print head according to the second preset trajectory requirement, and completing the printing of the target angles in the dam.

[0073] Specifically, after completing the printing of each target edge, control the loading mechanism to rotate so that the print head at the preset starting position is in the same plane as the midline of the first target angle A1, that is, in the projection direction, the print head is parallel to the midline of the first target angle A1. Control the print head to descend to the printing starting point of the first target angle, and from the printing starting point, pull the print head vertically upward according to the preset printing parameters to reach the printing end point of the first target angle A1, and complete the printing of the first target angle A1. Rotate the loading mechanism to sequentially make the midline of the second target angle A2, the midline of the third target angle A3, and the midline of the fourth target angle A4 in the same plane as the print head, and complete the printing of the remaining second target angle A2, third target angle A3, and fourth target angle A4 in the same manner as printing the first target angle A1, and obtain the following. Figure 5 The corner printing effect diagram shown is that the target corner is printed within the dotted line.

[0074] The chip sealing dam preparation method provided in this embodiment realizes the sealing printing of the dam inside the sample wall by printing the edges and corners of the dam respectively to finally form a closed structure, so as to have good sealing effect and be suitable for stacked printing of different dam heights. The printing is more flexible and space-saving, and meets the high-density and small-size dam sealing requirements.

[0075] In some optional implementations, the above step S103 includes:

[0076] Step a1, controlling the loading mechanism to rotate so that the initial target edge is perpendicular to the plane where the print head is located, and calculating the rotation angles of the remaining target edges relative to the initial target edge.

[0077] Specifically, the dam to be prepared is a polygon, and the initial target side can be any side. When printing starts, the initial target side is perpendicular to the plane where the print head is located, and the initial target side is printed first. The rotation angle of the remaining target sides relative to the initial target side refers to the rotation angle that the loading mechanism needs to rotate when the remaining target sides have the same angular direction as the initial target side.

[0078] Step a2: sort the remaining target edges from small to large according to the rotation angles of the remaining target edges relative to the initial target edge, to obtain an edge sorting result.

[0079] Specifically, in order to ensure that the total rotation angle of the loading mechanism is minimized, the remaining target edges are sorted from small to large according to the size of the rotation angle to obtain an edge sorting result.

[0080] like Figure 6As shown, the shape of the dam to be printed is an irregular polygon, and the edge labeled "1" is used as the initial target edge. The rotation angles of the remaining target edges and the initial target edge are: 2-90°, 3-0°, 4-90°, 5-180°, 6-270°, respectively. Therefore, the edge sorting result is: 1-3-2-4-5-6. This is only an example, but not limited to this.

[0081] Step a3, according to the edge sorting result, the remaining target edges are sequentially made perpendicular to the plane where the print head is located, and the print head is moved according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

[0082] Specifically, Figure 6 As shown, after printing the initial target edge, there is no need to rotate the loading mechanism, and the target edge labeled "3" can be directly printed. Then the loading mechanism is rotated 90° counterclockwise to print the target edges labeled "2" and "4". The printing of the entire dam is completed in sequence. This is only an example, but not limited to this.

[0083] In some optional implementations, the above step S104 includes:

[0084] Step b1, controlling the loading mechanism to rotate so that the center line of the initial target angle and the print head are in the same plane, and calculating the rotation angles of the center lines of the remaining target angles relative to the center line of the initial target angle.

[0085] Specifically, the dam to be prepared is a polygon, the initial target angle can be any inner angle, and when printing starts, the midline of the initial target angle is placed in the same plane as the print head, and the initial target angle is printed first. The rotation angle of the midlines of the remaining target angles relative to the midline of the initial target angle refers to the rotation angle that the loading mechanism needs to rotate when the midlines of the remaining target angles have the same angular direction as the midline of the initial target angle.

[0086] Step b2, sorting the remaining target angles from small to large according to the rotation angles of the remaining target angle midlines relative to the initial target angle midline, to obtain an angle sorting result.

[0087] Step b3, according to the angle sorting result, make the midlines of the remaining target angles and the print head in the same plane in turn, move the print head according to the second preset trajectory requirement, and complete the printing of the target angles in the dam.

[0088] Specifically, the process of sorting and printing the target corners is similar to the process of sorting and printing the target edges, which will not be described in detail here.

[0089] The chip sealing dam preparation method provided in the present embodiment calculates the edge rotation angles of the remaining target edges and the initial target edges, and prints the remaining target edges in the order of rotation angles from small to large, calculates the angular rotation angles of the remaining target angles and the initial target angles, and prints the remaining target angles in the order of rotation angles from small to large, so as to minimize the total rotation angle of the loading mechanism and improve printing efficiency.

[0090] In this embodiment, a chip sealing dam preparation method is provided, which can be used in the above-mentioned computer system. Figure 7 FIG. 1 is a flow chart of a method for preparing a chip sealing dam according to an embodiment of the present invention. Figure 7 As shown, the process includes the following steps:

[0091] Step S201, obtain dam parameters, and determine multiple target edges and multiple target angles according to the dam parameters. Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0092] Step S202, control the print head to rotate to a preset starting position. Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0093] Step S203, controlling the loading mechanism to rotate, sequentially making the multiple target edges perpendicular to the plane where the print head is located, and moving the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

[0094] Specifically, the above step S203 includes:

[0095] Step S2031, determining the height of the dam according to the dam parameters, and determining the number of printing layers according to the dam height and the preset layer height.

[0096] Specifically, the dam parameters, such as the dam height and total area, are determined according to the chip size at the center of the dam and the packaging requirements. The preset layer height is related to the print head output cross-section. For example, if the print head output cross-section diameter is 50 μm, the preset layer height is 50 μm. In the case of multi-layer printing, the height of the print head between adjacent layers differs by 50 μm. This is only an example, but is not limited to this.

[0097] After the dam height and the preset layer height are determined, the number of printing layers can be obtained by dividing the two: number of printing layers = dam height / preset layer height. Since there may be some collapse in the laminated materials, in the actual printing process, the preset layer height × number of printing layers < dam height. The number of printing layers or the height of each layer can be increased according to the actual situation.

[0098] Step S2032, if the number of printing layers is 1, determine the printing start point and printing end point of the target edge according to the first preset offset distance and the second preset offset distance, and control the print head to perform a single printing of the target edge from the printing start point to the printing end point. The first preset offset distance is the vertical distance between the printing start point of the target edge and the corresponding sample wall edge, and the second preset offset distance is the vertical distance between the printing start point of the target edge and the corresponding sample wall edge of the adjacent target edge.

[0099] Specifically, if the number of printing layers is 1, only the bottom of the sample needs further sealing. The sample wall height is 500μm, the required dam width is 150μm, and the dam height is 60μm. Select a print head with a discharge diameter of 150μm. By adjusting the printing parameters (printing material discharge speed, print head movement speed, etc.), when the print head is 60μm away from the bottom plate of the loading mechanism, the print line width is 150μm.

[0100] Rotate the loading mechanism so that the plane where the print head is located is perpendicular to the first target edge S1. To ensure that the print head does not collide with the sample wall, set the offset distance of each target edge. Figure 8 As shown, the vertical distance between the printing start point of the first target side S1 and the sample wall corresponding to the first target side S1 is the first preset offset distance, and the vertical distance between the printing start point of the first target side S1 and the sample wall corresponding to the fourth target side S4 is the second preset offset distance. Similarly, the vertical distance between the printing end point of the first target side S1 and the sample wall corresponding to the first target side S1 is the first preset offset distance, and the vertical distance between the printing end point of the first target side S1 and the sample wall corresponding to the second target side S4 is the second preset offset distance. In the spatial coordinate system, the first target side S1 can be taken as the y-axis and the fourth target side S4 as the x-axis, then the first preset offset distance is the x-offset distance, and the second preset offset distance is the y-offset distance.

[0101] After the printing of the first target side S1 is completed, the loading mechanism is rotated so that the second target side S2 is used as the y-axis and the first target side S1 is used as the x-axis, and the printing start point and the printing end point of the second target side S2 are determined again according to the x-offset distance and the y-offset distance. The vertical distance between the printing start point of the second target side S2 and the sample wall corresponding to the second target side S2 is the x-offset distance, and the vertical distance between the printing start point of the second target side S2 and the sample wall corresponding to the first target side S1 is the y-offset distance; the vertical distance between the printing end point of the second target side S2 and the sample wall corresponding to the second target side S2 is the x-offset distance, and the vertical distance between the printing end point of the second target side S2 and the sample wall corresponding to the third target side S1 is the y-offset distance. After the printing of the second target side S2 is completed, the loading mechanism is rotated so that the third target side and the fourth target side are used as the y-axis in turn, and the positions of the printing start points of the third target side and the fourth target side are determined according to the x-offset distance and the y-offset distance.

[0102] Step S2033, if the number of printing layers is greater than 1, determine the printing start point and printing end point corresponding to each printing layer of the target edge according to the first preset offset distance and the second preset offset distance, and control the print head to perform reciprocating printing between the printing start point and printing end point corresponding to each printing layer.

[0103] Specifically, if the number of printing layers is greater than 1, the sample wall height is 500 μm, and the preset layer height is 50 μm, then the machine needs to print 10 layers, and the print head needs to reciprocate 5 times. The lines of each layer are the same except for the height. Fig. 9 The figure shows the motion trajectory of the print head when printing the first target edge S1, and the lifting height of each layer is the preset layer height. The printing process of the first target edge S1, the second target edge S2, the third target edge S3, and the fourth target edge S4 is the same, which will not be repeated here.

[0104] In some optional implementations, the above step S2033 includes:

[0105] The printing of each layer is completed from the printing starting point to the printing end point in the order of increasing distance from the loading mechanism plane.

[0106] The distance between the printing start point of the current layer and the printing end point of the previous layer is the lifting height between each layer.

[0107] Specifically, after a target edge is reciprocated and printed with multiple layers, the required dam height is reached, and then the next adjacent target edge is printed in the same way. For the printing of each target edge dam, starting from the plane where the loading mechanism is located, reciprocating printing is performed layer by layer. The printing end point of the current layer is raised to a preset height to become the printing starting point of the next layer, such as Fig. 9 shown.

[0108] The chip sealing dam preparation method provided in this embodiment realizes multi-layer edge printing through reciprocating motion. The high dam occupies little space and can meet the high-density and small-size packaging requirements. When printing the target edge, two offset distances from the sample wall are set to avoid collision between the print head and the sample wall to damage the print head, thereby improving the safety of the printing process and ensuring the accuracy and integrity of the edge printing.

[0109] Step S204, controlling the loading mechanism to rotate, sequentially making the center lines of the multiple target angles and the print head in the same plane, moving the print head according to the second preset trajectory requirement, and completing the printing of the target angles in the dam.

[0110] Specifically, the above step S204 includes:

[0111] Step S2041, determining the height of the dam according to the dam parameters.

[0112] Specifically, the method for determining the dam height and the number of printing layers can be found in the detailed description in step S2031, which will not be repeated here.

[0113] Step S2042, if the number of printing layers is 1, a single printing is performed according to the position of the target corner.

[0114] Specifically, if the number of printing layers is 1, the loading mechanism is controlled to rotate, and the print head and the midlines of multiple target corners are sequentially placed in the same plane. The printing starting point of the target corner printing is determined according to the preset offset distance of the corner printing and the position of the target corner. The material is discharged from the printing starting point. After the preset time of discharging, the two adjacent target edges of the target corner are sealed and connected, the material is stopped, and the print head is lifted. Fig.10 The figure shows a schematic diagram of the preset offset distance for corner printing, which is the straight-line distance between the target corner vertex and the print head in the horizontal plane. By setting the preset offset distance for corner printing, collision and interference with adjacent edges and target walls during corner printing can be avoided, while ensuring the sealing of the printing.

[0115] Step S2043, if the number of printing layers is greater than 1, the print head is controlled to perform lifting printing according to the position of the target corner and the height of the dam.

[0116] In some optional implementations, controlling the print head to perform lifting printing according to the position of the target angle and the height of the dam includes:

[0117] The lifting start point and lifting end point of the print head are determined according to the position of the target angle and the height of the dam.

[0118] Specifically, the lifting start point of the print head is determined according to the position of the target angle and the preset offset distance of the target angle, which is the same as the process of printing the target angle in a single layer in step S2042. The lifting end point is determined according to the lifting start point and the height of the dam, which is the point vertically upward from the lifting start point and the same as the height of the dam. It should be noted that the preset offset distance of the target angle, the first preset offset distance of the target edge, and the second preset offset distance can be adjusted according to actual conditions so that the prepared dam parameters meet the preparation requirements.

[0119] Control the print head to move to the lifting starting point and discharge the material at the preset time.

[0120] Specifically, when printing the target corner, the print head is controlled to move to the lifting starting point of the target corner, and then the material is discharged and filled for a preset time so that the target corner is sealed and filled with the bottom plate of the loading mechanism.

[0121] According to the preset material discharging speed and print head moving speed, the print head is controlled to perform lifting printing from the lifting starting point to the lifting ending point.

[0122] Specifically, according to the preset material discharging speed and the print head moving speed, the print head is controlled to move and discharge materials from the lifting starting point to the lifting ending point for lifting printing. After the final printing is completed, the height of each target corner is the same as the height of each target side, which is the height of the dam.

[0123] The chip sealing dam preparation method provided in this embodiment is suitable for single-layer or multi-layer printing, meets the printing requirements of different dam heights, saves space for high dams, and adopts a lifting and discharging method for corner printing to achieve sealing and filling of connected edges, thereby improving the sealing of the dam.

[0124] In a specific embodiment, the sample wall height is 500 μm, the required dam width is 150 μm, the required dam height is 60 μm, and the process of printing a single layer of inner dam on a rectangular sample wall includes:

[0125] (1) Move the print head to the preset starting position, rotate the print head until the print head forms a 30° angle with the vertical direction, and the angular position of the print head no longer changes.

[0126] (2) Select a print head with a diameter of 150μ and adjust the printing parameters, such as material output size and print head movement speed, so that when the print head is 60μm away from the base plate, the printed line width is 150μm.

[0127] (3) Fix the sample to the loading mechanism and rotate the loading mechanism so that the first target edge S1 in the projection direction is perpendicular to the print head. To ensure that the print head does not collide with the sample, set the side printing x offset distance: 65 μm, the side printing y offset distance: 160 μm, lower the print head to a height of 60 μm from the bottom, and move the print head according to the printing parameters in (2). The movement path is as follows: Figure 8 When the printhead is finished, lift it up.

[0128] (4) Rotate the loading mechanism counterclockwise to make the second target side S2, the third target side S3, and the fourth target side S4 have the same angle as the first target side S1 in (3), and repeat the process of printing the first target side S1 to complete the printing of the four target sides.

[0129] (5) Rotate the loading mechanism so that the print head is parallel to the midline of the first target angle A1 in the projection direction, set the offset distance of the corner printing to 300 μm, lower the print head to a height of 60 μm from the bottom, move the print head to the lifting starting point without discharging material, and no lifting action is required for single-layer printing. After discharging material at the lifting starting point for a period of time, lift the print head.

[0130] (6) The second target angle A2, the third target angle A3, and the fourth target angle A4 are respectively made the same as the first target angle A1 in (5), and the process of printing the first target angle A1 is repeated to complete the printing of the four target angles.

[0131] like Fig.11 As shown, a single-layer dam is actually printed using the dam preparation method provided in this embodiment. It can be seen that the target corner is sealed and connected to the adjacent edge, and the printing accuracy is high, meeting the high-density and small-size packaging requirements.

[0132] In another specific embodiment, the sample wall height is 500 μm, the required dam width is 150 μm, and the required dam height is 500 μm. The process of printing the rectangular sample wall with a laminated inner dam includes:

[0133] (1) Move the print head to the preset starting position, rotate the print head until the print head forms a 30° angle with the vertical direction, and the angular position of the print head no longer changes.

[0134] (2) Select a print head with a diameter of 150μ and adjust the printing parameters, such as material output size and print head movement speed, so that when the print head is 60μm away from the base plate, the printed line width is 150μm.

[0135] (3) Fix the sample to the loading mechanism and rotate the loading mechanism so that the first target edge S1 in the projection direction is perpendicular to the print head. To ensure that the print head does not collide with the sample, set the side printing x offset distance: 50 μm, the side printing y offset distance: 160 μm, lower the print head to a height of 60 μm from the bottom, and move the print head according to the printing parameters in (2). The reciprocating motion path is as follows: Fig. 9 As shown in the figure, a total of 10 layers are printed, 5 reciprocating movements are made, and the lifting height of each layer is 50μm. At this time, the total thickness = 60+50×9=510μm. Since the laminated material may collapse to a certain extent, the actual total thickness will be less than 510μm. The number of printed layers or the lifting height of each layer can be increased according to the actual situation.

[0136] (4) Rotate the loading mechanism counterclockwise to make the second target side S2, the third target side S3, and the fourth target side S4 have the same angle as the first target side S1 in (3), and repeat the process of printing the first target side S1 to complete the stacking printing of the four target sides.

[0137] (5) Rotate the loading mechanism so that the needle is parallel to the midline of the first target angle A1 in the projection direction. ① Set the angle printing offset distance to 300 μm, lower the print head to a height of 60 μm from the bottom, move the print head to the lifting starting point without discharging material, and after discharging material at the lifting starting point for a period of time, lift the print head while discharging material to a height of 500 μm, then stop discharging material and lift the print head.

[0138] (6) The second target angle A2, the third target angle A3, and the fourth target angle A4 are respectively made the same as the first target angle A1 in (5), and the process of printing the first target angle A1 is repeated to complete the stacking printing of the four target angles.

[0139] In this embodiment, a chip sealing dam preparation device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0140] This embodiment provides a chip sealing dam preparation device, such as Fig.12 As shown, the printing material is extruded from the printing head to form a dam inside the sample wall on the loading mechanism, and the device includes:

[0141] The parameter acquisition module 1201 is used to acquire the dam parameters and determine a plurality of target sides and a plurality of target angles according to the dam parameters.

[0142] The print head position initialization module 1202 is used to control the print head to rotate to a preset starting position.

[0143] The edge printing module 1203 is used to control the rotation of the loading mechanism, so as to sequentially make multiple target edges perpendicular to the plane where the print head is located, and to move the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

[0144] The corner printing module 1204 is used to control the rotation of the loading mechanism, so that the midlines of the multiple target corners and the print head are in the same plane in turn, and the print head is moved according to the second preset trajectory requirement to complete the printing of the target corners in the dam.

[0145] In some optional implementations, the edge printing module 1203 includes:

[0146] The printing layer number determination unit is used to determine the height of the dam according to the dam parameters, and to determine the number of printing layers according to the dam height and the preset layer height.

[0147] A single-layer edge printing unit is used to determine the printing start point and the printing end point of the target edge according to a first preset offset distance and a second preset offset distance if the number of printing layers is 1, and control the print head to perform a single printing of the target edge from the printing start point to the printing end point, wherein the first preset offset distance is the vertical distance between the printing start point of the target edge and the corresponding sample wall edge, and the second preset offset distance is the vertical distance between the printing start point of the target edge and the corresponding sample wall edge of the adjacent target edge.

[0148] The stacked edge printing unit is used to determine the printing start point and the printing end point corresponding to each printing layer of the target edge according to the first preset offset distance and the second preset offset distance if the number of printing layers is greater than 1, and control the print head to perform reciprocating printing between the printing start point and the printing end point corresponding to each printing layer.

[0149] In some optional implementations, the corner printing module 1204 includes:

[0150] The dam height determination unit is used to determine the dam height according to the dam parameters.

[0151] The single-layer corner printing unit is used to perform a single print according to the position of the target corner if the number of printing layers is 1.

[0152] The stacking angle printing unit is used to control the print head to lift and print according to the position of the target angle and the height of the dam if the number of printed layers is greater than 1.

[0153] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0154] The chip sealing dam preparation device in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0155] The embodiment of the present invention also provides a computer device having the above Fig.12 The chip sealing dam preparation device shown.

[0156] See also Fig.13 , Fig.13 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Fig.13 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Fig.13 A processor 10 is taken as an example.

[0157] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0158] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0159] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0160] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0161] The computer device further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0162] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0163] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for preparing a chip sealing dam, wherein a printing material is extruded from a printing head to form an inner dam on the inner side of a sample wall on a loading mechanism, characterized in that: The method comprises: Acquire dam parameters, and determine multiple target edges and multiple target angles according to the dam parameters; Control the print head to rotate to a preset starting position, and print the edges and corners of the dam to form a closed structure; Controlling the loading mechanism to rotate, sequentially making the multiple target edges perpendicular to the plane where the print head is located, and moving the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam; The loading mechanism is controlled to rotate, so that the midlines of the multiple target angles and the print head are in the same plane in turn, and the print head is moved according to the second preset trajectory requirement to complete the printing of the target angles in the dam.

2. The method according to claim 1, characterized in that The step of moving the print head according to the first preset trajectory to complete printing of the target edge in the dam includes: Determine the height of the dam according to the dam parameters, and determine the number of printing layers according to the dam height and the preset layer height; If the number of printing layers is 1, the printing start point and the printing end point of the target edge are determined according to a first preset offset distance and a second preset offset distance, and the print head is controlled to perform a single printing of the target edge from the printing start point to the printing end point, wherein the first preset offset distance is a vertical distance between the printing start point of the target edge and the corresponding sample wall edge, and the second preset offset distance is a vertical distance between the printing start point of the target edge and the corresponding sample wall edge of the adjacent target edge; If the number of printing layers is greater than 1, the printing start point and the printing end point corresponding to each printing layer of the target edge are determined according to the first preset offset distance and the second preset offset distance, and the print head is controlled to perform reciprocating printing between the printing start point and the printing end point corresponding to each printing layer.

3. The method according to claim 2, characterized in that The control of the print head to perform reciprocating printing between the printing starting point and the printing end point corresponding to each printing layer includes: The printing of each layer is completed from the printing starting point to the printing end point in the order of increasing distance from the loading mechanism plane; The distance between the printing start point of the current layer and the printing end point of the previous layer is the lifting height between each layer.

4. The method according to claim 1, characterized in that: The step of moving the print head according to the second preset trajectory to complete printing of the target angle in the dam includes: Determine the height of the dam according to the dam parameters; If the number of printing layers is 1, a single print is performed according to the position of the target corner; If the number of printing layers is greater than 1, the print head is controlled to perform lifting printing according to the position of the target corner and the height of the dam.

5. The method according to claim 4, characterized in that The position of the target angle and the height of the dam control the print head to perform lifting printing, including: Determine the lifting start point and lifting end point of the print head according to the position of the target angle and the height of the dam; Control the print head to move to the lifting starting point and discharge the material at the preset time; According to the preset material discharging speed and print head moving speed, the print head is controlled to perform lifting printing from the lifting starting point to the lifting ending point.

6. The method according to claim 1, characterized in that Controlling the loading mechanism to rotate, sequentially making the plurality of target edges perpendicular to the plane where the print head is located, moving the print head according to the first preset trajectory requirement, and completing the printing of the target edges in the dam, including: Controlling the loading mechanism to rotate so that the initial target edge is perpendicular to the plane where the print head is located, and calculating the rotation angles of the remaining target edges relative to the initial target edge; According to the rotation angles of the remaining target edges relative to the initial target edge, the remaining target edges are sorted from small to large to obtain an edge sorting result; According to the edge sorting result, the remaining target edges are sequentially made perpendicular to the plane where the print head is located, and the print head is moved according to the first preset trajectory requirement to complete the printing of the target edges in the dam.

7. The method according to claim 1, characterized in that The target angle is not less than 90°, the loading mechanism is controlled to rotate, the midlines of the multiple target angles are sequentially placed in the same plane as the print head, the print head is moved according to the second preset trajectory, and the printing of the target angle in the dam is completed, including: Controlling the rotation of the loading mechanism so that the midline of the initial target angle and the print head are in the same plane, and calculating the rotation angles of the midlines of the remaining target angles relative to the midline of the initial target angle; According to the rotation angles of the remaining target angle midlines relative to the initial target angle midline, the remaining target angles are sorted from small to large to obtain an angle sorting result; According to the angle sorting result, the midlines of the remaining target angles are sequentially placed in the same plane as the print head, and the print head is moved according to the second preset trajectory to complete the printing of the target angles in the dam.

8. A chip sealing dam preparation device, wherein the printing material is extruded from the printing head to form an inner dam on the inner side of the sample wall on the loading mechanism, characterized in that: The device comprises: A parameter acquisition module, used for acquiring dam parameters and determining a plurality of target sides and a plurality of target angles according to the dam parameters; The print head position initialization module is used to control the print head to rotate to a preset starting position and print the edges and corners of the dam to form a closed structure; An edge printing module is used to control the rotation of the loading mechanism, so as to sequentially make the multiple target edges perpendicular to the plane where the print head is located, and to move the print head according to the first preset trajectory requirement to complete the printing of the target edges in the dam; The corner printing module is used to control the rotation of the loading mechanism, so that the midlines of multiple target corners and the print head are in the same plane in turn, and the print head is moved according to the second preset trajectory requirements to complete the printing of the target corners in the dam.

9. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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