Method and apparatus for preparing chip sealing dam, and device and medium

Abstract

The present invention relates to the technical field of chip packaging. Disclosed are a method and apparatus for preparing a chip sealing dam, and a device and a medium. The method comprises: acquiring dam parameters, and determining a plurality of target edges and a plurality of target corners on the basis of the dam parameters; controlling a printing head to rotate to a preset starting position; controlling a loading mechanism to rotate, sequentially enabling the plane where the printing head is located to be perpendicular to the plurality of target edges, and moving the printing head according to a first preset trajectory requirement so as to complete the printing of the target edges of a dam; and controlling the loading mechanism to rotate, sequentially enabling the printing head to be located in the same plane as the medians of the plurality of target corners, and moving the printing head according to a second preset trajectory requirement so as to complete the printing of the target corners of the dam. In the present invention, the edges and corners of the dam are separately printed to finally form a closed structure, thereby implementing the sealed printing of the dam in a sample wall. The present invention achieves a good sealing effect, is suitable for stacked printing of different dam heights, involves more flexible printing, saves on space, and can meet high-density and small-sized dam sealing requirements.

Description

A method, apparatus, equipment and medium for preparing a chip-sealed dam Technical Field

[0001] This invention relates to the field of chip packaging technology, specifically to a method, apparatus, equipment, and medium for preparing a chip sealing dam. Background Technology

[0002] In the field of electronic packaging, sealed cavities are often required in certain scenarios, and selective sealing can be achieved in conjunction with molds. Currently, in the back-end underfill process of RF modules, it is necessary to ensure that the filler adhesive does not enter the hollow area to avoid affecting the chip and package structure in the middle. Traditional damming solutions involve attaching prefabricated metal structural components to the edge of the target area, and then using dispensing to fill the gap between the metal structural components and the surface mount structure to form an isolation dam. However, setting up metal structural components increases the size of the chip package structure, making it impossible to achieve the requirements of high-density, small-size packaging. Currently, there is no good method for fabricating inner dams. Summary of the Invention

[0003] In view of this, the present invention provides a method, apparatus, equipment and medium for preparing a chip sealing dam, in order to solve the problem that existing chip sealing dam technologies cannot meet the requirements of high-density, small-size packaging.

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

[0005] Obtain the dam parameters, and determine multiple target edges and multiple target angles based on the dam parameters;

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

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

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

[0009] The chip sealing dam preparation method provided by the present invention achieves sealed printing of the dam inside the sample wall by printing the edges and corners of the dam separately to form a closed structure. It has a good sealing effect and is suitable for stacked printing of different dam heights. The printing is more flexible and saves space, meeting the requirements of high-density and small-size dam sealing.

[0010] In one optional implementation, the print head is moved according to a first preset trajectory to complete the printing of the target edge in the dam, including:

[0011] The height of the dam is determined based on the dam parameters, and the number of printing layers is determined based on the dam height and the preset layer height.

[0012] If the number of printing layers is 1, the printing start point and printing end point of the target edge are determined according to the first preset offset distance and the second preset offset distance. 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 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.

[0013] If the number of printing layers is greater than 1, the printing start point and printing end point corresponding to each printing layer on 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 reciprocate between the printing start point and printing end point corresponding to each printing layer.

[0014] In one optional implementation, controlling the print head to reciprocate between the start and end points of each printing layer includes:

[0015] Print each layer sequentially from the printing start point to the printing end point, following the order of increasing distance from the plane of the loading mechanism.

[0016] The distance between the starting point of the current layer and the ending point of the previous layer is the lift height between each layer.

[0017] The chip sealing dam preparation method provided by this invention achieves multi-layer edge printing through reciprocating motion. The high dam occupies little space and can meet the packaging requirements of high density and small size. During the target edge printing, by setting two offset distances from the sample wall, the print head is prevented from colliding with the sample wall and damaging the print head, thereby improving the safety of the printing process and ensuring the accuracy and integrity of edge printing.

[0018] In one optional implementation, the print head is moved according to a second preset trajectory to complete the printing of the target angle in the dam, including:

[0019] Determine the height of the dam based on the dam parameters;

[0020] If the number of printing layers is 1, print in a single step based on the position of the target corner;

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

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

[0023] The starting and ending points for lifting the print head are determined based on 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 material after a preset time;

[0025] According to the preset output speed and print head movement speed, the print head is controlled to lift and print from the lifting start point to the lifting end point.

[0026] The chip sealing dam preparation method provided by this 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 side-lifting and side-discharge method for corner printing to achieve sealing and filling of connected edges and improve the sealing performance of the dam.

[0027] In one optional implementation, the loading mechanism is controlled to rotate, sequentially making multiple target edges perpendicular to the plane where the print head is located, and the print head is moved according to a first preset trajectory to complete the printing of the target edges in the dam, including:

[0028] Control the loading mechanism to rotate so that the initial target edge is perpendicular to the plane where the print head is located, and calculate the rotation angle of the remaining target edges relative to the initial target edge;

[0029] Based on the rotation angle of the remaining target edges relative to the initial target edge, sort the remaining target edges from smallest to largest to obtain the edge sorting result;

[0030] Based on the edge sorting results, 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 requirements to complete the printing of the target edges in the dam.

[0031] In one optional implementation, the target angle is not less than 90°. The loading mechanism is controlled to rotate, sequentially bringing the centerlines of multiple target angles into the same plane as the print head. The print head is then moved according to a second preset trajectory to complete the printing of the target angles within the dam. This includes:

[0032] Control the rotation of the loading mechanism so that the centerline of the initial target angle is in the same plane as the print head, and calculate the rotation angle of the centerlines of the remaining target angles relative to the centerline of the initial target angle;

[0033] Based on the rotation angle of the remaining target angles relative to the initial target angle median, sort the remaining target angles from smallest to largest to obtain the angle sorting result;

[0034] Based on the angle sorting results, the centerlines of the remaining target angles are sequentially aligned with the print head in the same plane. The print head is then moved according to the second preset trajectory requirements to complete the printing of the target angles in the dam.

[0035] The chip sealing dam preparation method provided by this invention allows the dam to be of any shape, as long as the target angle is not less than 90°. This avoids interference between adjacent sides and the print head, ensuring the integrity of the dam and the sealing of adjacent sides. By calculating the rotation angle between the remaining target sides and the initial target side, and printing the remaining target sides in order of increasing rotation angle, the total rotation angle of the loading mechanism is minimized, thereby improving printing efficiency.

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

[0037] The parameter acquisition module is used to acquire the dam parameters and determine multiple target edges and multiple target angles based on the dam parameters;

[0038] The printhead position initialization module is used to control the printhead to rotate to a preset starting position;

[0039] The edge printing module is used to control the rotation of the loading mechanism, so that multiple target edges are perpendicular to the plane where the print head is located in sequence, and the print head is moved according to the first preset trajectory requirements 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 centerlines of multiple target corners are in the same plane as the print head, 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] Thirdly, 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 computer instructions to perform the method described in the first aspect or any corresponding embodiment thereof.

[0042] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to perform the method described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

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

[0045] Figure 2 is a schematic flowchart of a chip sealing dam preparation method according to an embodiment of the present invention;

[0046] Figure 3 is a schematic diagram showing the positions of the target edge and the target corner in the chip sealing dam preparation method 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 each target edge of the irregular dam in the chip sealing dam preparation method according to an embodiment of the present invention;

[0050] Figure 7 is a schematic flowchart of another chip sealing dam preparation method according to an embodiment of the present invention;

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

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

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

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

[0055] Figure 12 is a structural block diagram of a chip sealing dam fabrication apparatus according to an embodiment of the present invention;

[0056] Figure 13 is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Figure 1 illustrates several existing printing methods for sealing the inner dam of a chip. The commonly used sealant dispensing method is vertical dispensing (as shown in Figure 1a), which has no requirements for sealing height or linewidth. For sealing the outer dam, feasibility can be ensured by leaving sufficient space for dispensing in the design. However, this method typically wastes a large area, reducing device density and gradually failing to meet the current requirements of miniaturization and high-density product design. Furthermore, for the inner dam, since the cavity usually contains functional areas, it is difficult to leave sufficient space for filling the sealant in the design, limiting the flowability of the sealant. Even when choosing a sealant with certain shape retention, due to the wall thickness of the dispensing head, even with a thin-walled glass needle, incomplete sealing of the sealant and the structure to be sealed can occur because the dam (formed by the sealing material) does not adhere tightly to the sample wall (the structure to be sealed).

[0059] Choosing a shape-preserving material and using a tilted printhead can ensure a precise fit between the sealing material and the structure to be sealed. However, this presents a new problem: the printing end point and the printing start point need to close to form a complete pattern. Again, due to the thickness of the printhead wall, the shape of the start point is inevitably disrupted at the end point, making a seal impossible (as shown in Figure 1b). If the next adjacent side is printed after curing on one side, the end point of the cured side interferes with the start point of the next adjacent side, creating a gap, still preventing a seal (as shown in Figure 1c). On the other hand, tilting the printing head to form a dam requires the printhead or bottom support structure to have rotation capabilities. When using bottom rotation, the area to be processed and the bottom support structure must be located at the same rotation center (as shown in Figure 1d). Otherwise, although the angular velocity is the same, the linear velocity will differ in different parts, resulting in inconsistent line widths, making this method unsuitable for array products.

[0060] To address the aforementioned issues, this invention provides a method for fabricating a chip sealing dam. By printing the edges and corners of the dam separately to ultimately form a closed structure, the fabricated sealing dam achieves the effect of meeting the requirements of high-density, small-size packaging.

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

[0062] This embodiment provides a method for fabricating a chip sealing dam, which can be used in the aforementioned computer system. Figure 2 is a flowchart of the chip sealing dam fabrication method according to an embodiment of the present invention. As shown in Figure 2, the process includes the following steps:

[0063] Step S101: Obtain the dam parameters and determine multiple target edges and multiple target angles based on the dam parameters.

[0064] Specifically, the printing material is extruded from the print head and forms 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. Therefore, the sample wall has sides and corners corresponding to the dam, as shown in Figure 3. 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). 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. This is only an example and is not a limitation. In addition to the target edge and target angle, the dam parameters also include the dam height, width, and distance between each edge and the chip. In this embodiment, the dam height is not greater than the sample wall height. The dam width and the distance between each edge of the dam and the chip can be determined according to the actual situation, as long as the dam packaging requirements are met. This is just an example, but not a limitation.

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

[0066] Specifically, the pattern for the dam is not limited to a rectangle; any pattern with an interior angle (target angle) of not less than 90° is acceptable. This is because if the interior angle is less than 90°, interference between two adjacent sides of the print head may occur during printing using the rotating loading mechanism.

[0067] The chip sealing dam preparation method provided in this embodiment allows the dam to be of any shape, as long as the target angle is not less than 90°, to avoid interference between adjacent sides and the print head, and to ensure the integrity of the dam and the sealing of adjacent sides.

[0068] Step S102: Control the print head to rotate to the preset starting position.

[0069] Specifically, a suitable preset starting position can be selected in advance by manually moving the print head. This can be a suitable position directly above the printing area, ensuring that the print head does not collide with other objects and facilitating its movement from the preset starting position to the printing position. The print head then begins its movement and printing task from the preset starting position. When the print head is at the preset starting position, it forms a 30° angle with the vertical direction. Throughout the printing process, the preset starting position and the print head's posture at the starting position remain unchanged.

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

[0071] Specifically, after the print head reaches the fixed preset starting position, for a rectangular dam, the loading mechanism is rotated to make the plane where the print head is located perpendicular to the first target edge S1. This ensures that when the print head descends along the first target edge S1, the relative position of the print head and the sample wall edge corresponding to the first target edge S1 guarantees precise adhesion between the printed material and the sample wall. Following the first preset trajectory requirements, the print head is controlled to move from the preset starting position to the printing starting point of the first target edge S1. Then, based on preset printing parameters, the output 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. The print head is then controlled to complete printing of the first target edge S1 according to the printing parameters, and then returns to the preset starting position. After printing the first target edge S1, the loading mechanism is rotated to sequentially make the second target edge S2, the third target edge S3, and the fourth target edge S4 perpendicular to the plane where the print head is located. The remaining second target edge S2, the third target edge S3, and the fourth target edge S4 are printed in the same manner as the first target edge S1, resulting in the edge printing effect shown in Figure 4.

[0072] Step S104: Control the loading mechanism to rotate, sequentially making the centerlines of multiple target angles and the print head in the same plane, and move the print head according to the second preset trajectory requirements to complete the printing of the target angles in the dam.

[0073] Specifically, after printing each target edge, the loading mechanism is rotated so that the print head, located at the preset starting position, is in the same plane as the centerline of the first target angle A1, that is, in the projection direction, the print head is parallel to the centerline of the first target angle A1. The print head is then lowered to the printing starting point of the first target angle, and from the printing starting point, the print head is vertically pulled upwards according to the preset printing parameters until it reaches the printing ending point of the first target angle A1, completing the printing of the first target angle A1. The loading mechanism is rotated so that the centerlines of the second target angle A2, the third target angle A3, and the fourth target angle A4 are respectively in the same plane as the printing of the first target angle A1. The remaining second target angle A2, the third target angle A3, and the fourth target angle A4 are printed in the same way as the first target angle A1, resulting in the angle printing effect diagram shown in Figure 5, where the area within the dashed lines represents the printing of the target angles.

[0074] The chip sealing dam preparation method provided in this embodiment achieves sealed printing of the dam inside the sample wall by printing the edges and corners of the dam separately to form a closed structure. It has a good sealing effect and is suitable for stacked printing of different dam heights. The printing is more flexible and saves space, meeting the requirements of high-density, small-size dam sealing.

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

[0076] Step a1: Control the loading mechanism to rotate so that the initial target edge is perpendicular to the plane where the print head is located, and calculate the rotation angle 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 edge can be any edge. When printing begins, the initial target edge is made perpendicular to the plane where the print head is located, and the initial target edge is printed first. The rotation angle of the other target edges relative to the initial target edge refers to the rotation angle that the loading mechanism needs to rotate to make the angle direction of the other target edges the same as that of the initial target edge.

[0078] Step a2: Sort the remaining target edges from smallest to largest according to the rotation angle of the remaining target edges relative to the initial target edge, and obtain the edge sorting result.

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

[0080] As shown in Figure 6, the shape of the dam to be printed is an irregular polygon. The edge labeled "1" is the initial target edge. The rotation angles of the other target edges relative to the initial target edge are 2-90°, 3-0°, 4-90°, 5-180°, and 6-270°, respectively. Therefore, the edge sorting result is 1-3-2-4-5-6. This is just an example and is not a limitation.

[0081] Step a3: Based on the edge sorting results, make the remaining target edges perpendicular to the plane where the print head is located, and move the print head according to the first preset trajectory requirements to complete the printing of the target edges in the dam.

[0082] Specifically, as shown in Figure 6, after printing the initial target edge, there is no need to rotate the loading mechanism. Directly print the target edge labeled "3", and then rotate the loading mechanism counterclockwise by 90° to print the target edges labeled "2" and "4". The printing of the entire dam is completed in sequence. This is just an example, but it is not limited to this.

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

[0084] Step b1: Control the loading mechanism to rotate so that the centerline of the initial target angle is in the same plane as the print head, and calculate the rotation angle of the remaining target angle centerlines relative to the initial target angle centerline.

[0085] Specifically, the dam to be prepared is a polygon, and the initial target angle can be any interior angle. When printing begins, the centerline of the initial target angle is aligned with the print head in the same plane, and the initial target angle is printed first. The rotation angle of the other target angle centerlines relative to the initial target angle centerline refers to the rotation angle required for the loading mechanism to rotate when the angles of the other target angle centerlines are in the same direction as those of the initial target angle centerline.

[0086] Step b2: Sort the remaining target angles from smallest to largest according to the rotation angle of the remaining target angle medians relative to the initial target angle median, and obtain the angle sorting result.

[0087] Step b3: Based on the angle sorting results, make the midline of the remaining target angles lie in the same plane as the print head, and move the print head according to the second preset trajectory requirements to complete the printing of the target angles in the dam.

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

[0089] The chip sealing dam preparation method provided in this embodiment calculates the rotation angle between the remaining target edges and the initial target edges, and prints the remaining target edges in order of increasing rotation angle. It also calculates the angular rotation angle between the remaining target angles and the initial target angle, and prints the remaining target angles in order of increasing rotation angle, thereby minimizing the total rotation angle of the loading mechanism and improving printing efficiency.

[0090] This embodiment provides a method for fabricating a chip sealing dam, which can be used in the aforementioned computer system. Figure 7 is a flowchart of the chip sealing dam fabrication method according to an embodiment of the present invention. As shown in Figure 7, the process includes the following steps:

[0091] Step S201: Obtain the dam parameters and determine multiple target edges and multiple target angles based on the dam parameters. For details, please refer to step S101 of the embodiment shown in Figure 1, which will not be repeated here.

[0092] Step S202: Control the print head to rotate to a preset starting position. For details, please refer to step S101 of the embodiment shown in Figure 1, which will not be repeated here.

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

[0094] Specifically, step S203 includes:

[0095] Step S2031: Determine the dam height based on the dam parameters, and determine the number of printing layers based on the dam height and the preset layer height.

[0096] Specifically, the parameters of the dam are determined based on the chip size and packaging requirements at the center of the dam, such as the dam height and total area. The preset layer height is related to the output cross-section of the printhead. For example, if the output cross-section diameter of the printhead is 50μm, then the preset layer height is 50μm. In the case of multi-layer printing, the height difference of the printhead between adjacent layers is 50μm. This is just an example, but it is not a limitation.

[0097] Once the dam height and 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 some collapse may occur in the laminated material, in the actual printing process, 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, the printing start point and printing end point of the target edge are determined according to the first preset offset distance and the second preset offset distance. 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 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. Therefore, a printhead with an output diameter of 150μm is selected. By adjusting the printing parameters (printing material output speed, printhead movement speed, etc.), the print line width is 150μm when the printhead is 60μm away from the loading mechanism base plate.

[0100] A rotating loading mechanism is used to align the plane of the print head with the first target edge S1. To prevent the print head from colliding with the sample wall, offset distances are set for each target edge. As shown in Figure 8, the vertical distance between the printing start point of the first target edge S1 and the sample wall corresponding to the first target edge S1 is the first preset offset distance, and the vertical distance between the printing start point of the first target edge S1 and the sample wall corresponding to the fourth target edge S4 is the second preset offset distance. Similarly, the vertical distance between the printing end point of the first target edge S1 and the sample wall corresponding to the first target edge S1 is the first preset offset distance, and the vertical distance between the printing end point of the first target edge S1 and the sample wall corresponding to the second target edge S4 is the second preset offset distance. In a spatial coordinate system, the first target edge S1 can be taken as the y-axis, and the fourth target edge S4 as the x-axis; therefore, the first preset offset distance is the x-offset distance, and the second preset offset distance is the y-offset distance.

[0101] After printing the first target edge S1, rotate the loading mechanism so that the second target edge S2 is used as the y-axis and the first target edge S1 as the x-axis. Again, determine the printing start and end points of the second target edge S2 according to the x-offset and y-offset distances. The vertical distance between the printing start point of the second target edge S2 and the sample wall corresponding to the second target edge S2 is the x-offset distance; the vertical distance between the printing start point of the second target edge S2 and the sample wall corresponding to the first target edge S1 is the y-offset distance; the vertical distance between the printing end point of the second target edge S2 and the sample wall corresponding to the second target edge S2 is the x-offset distance; the vertical distance between the printing end point of the second target edge S2 and the sample wall corresponding to the third target edge S1 is the y-offset distance. After printing the second target edge S2, rotate the loading mechanism, sequentially using the third and fourth target edges as the y-axis. Determine the printing start points of the third and fourth target edges according to the x-offset and y-offset distances.

[0102] Step S2033: If the number of printing layers is greater than 1, the printing start point and printing end point corresponding to each printing layer on 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 reciprocate 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 500μm, and the preset layer height is 50μm, then 10 layers need to be printed. The print head needs to reciprocate 5 times. The lines of each layer are the same except for the height, as shown in Figure 9, which is a schematic diagram of the movement trajectory of the print head when printing the first target edge S1. 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, and will not be described again here.

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

[0105] Print each layer sequentially from the starting point to the ending point, following the order of increasing distance from the loading mechanism plane.

[0106] The distance between the starting point of the current layer and the ending point of the previous layer is the lift height between each layer.

[0107] Specifically, after printing multiple layers of a target edge to reach the required dam height, the next adjacent target edge is printed in the same way. For the printing of each target edge dam, the printing starts from the plane where the loading mechanism is located and is repeated layer by layer. The printing end point of the current layer is raised to a preset height, which becomes the printing start point of the next layer, as shown in Figure 9.

[0108] The chip sealing dam fabrication method provided in this embodiment achieves multi-layer edge printing through reciprocating motion. The high dam occupies little space and can meet the packaging requirements of high density and small size. During target edge printing, by setting two offset distances from the sample wall, the print head is prevented from colliding with the sample wall and damaging the print head, thus improving the safety of the printing process and ensuring the accuracy and integrity of edge printing.

[0109] Step S204: Control the loading mechanism to rotate, so that the centerlines of multiple target angles are in the same plane as the print head, and move the print head according to the second preset trajectory requirements to complete the printing of the target angles in the dam.

[0110] Specifically, step S204 includes:

[0111] Step S2041: Determine the height of the dam based on the dam parameters.

[0112] For details on how to determine the height of the dam and the number of printing layers, please refer to the detailed explanation in step S2031, which will not be repeated here.

[0113] Step S2042: If the number of printing layers is 1, perform a single print based on the position of the target corner.

[0114] Specifically, if the number of printing layers is 1, the loading mechanism is rotated to sequentially align the print head with the centerlines of multiple target angles in the same plane. The starting point for printing the target angle is determined based on the preset offset distance for angle printing and the position of the target angle. Material is discharged from the starting point, and after a preset discharge time, the two adjacent target edges of the target angle are sealed together, material discharge stops, and the print head is raised. Figure 10 shows a schematic diagram of the preset offset distance for angle printing, representing the straight-line distance between the vertex of the target angle and the print head in the horizontal plane. By setting the preset offset distance for angle printing, collisions and interference with adjacent edges and target walls during angle printing are avoided, while ensuring the sealing of the print.

[0115] Step S2043: If the number of printing layers is greater than 1, control the printing head to lift and print according to the position of the target corner and the height of the dam.

[0116] In some alternative implementations, the print head is controlled to lift and print based on the position of the target angle and the height of the dam, including:

[0117] The starting and ending points for lifting the print head are determined based on the position of the target angle and the height of the dam.

[0118] Specifically, the starting point for lifting the print head is determined based on the position of the target angle and its preset offset distance, similar to the process in step S2042 when printing the target angle in a single layer. The ending point for lifting is determined based on the starting point and the height of the dam, which is the point vertically upward from the starting point and at the same height as the dam. It should be noted that the preset offset distances for the target angle, the first preset offset distance, and the second preset offset distance for the target side can be adjusted according to actual conditions to ensure that the prepared dam parameters meet the preparation requirements.

[0119] Control the print head to move to the starting point of the lifting process and discharge the material after a preset time.

[0120] Specifically, when printing the target angle, the print head is controlled to move to the starting point of the target angle's lifting, and then a preset time is used for material feeding to ensure that the target angle is sealed and filled with the loading mechanism's base plate.

[0121] According to the preset output speed and print head movement speed, the print head is controlled to lift and print from the lifting start point to the lifting end point.

[0122] Specifically, according to the preset material output speed and print head movement speed, the print head is controlled to move and output material simultaneously from the lifting start point to the lifting end point for lifting and printing. After the final printing is completed, the height of each target angle is the same as the height of each target side, which is the dam height.

[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 unloading method for corner printing to achieve sealing and filling of connected edges, thereby improving the sealing performance of the dam.

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

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

[0126] (2) Select a print head with a diameter of 150μm and adjust the printing parameters, such as the material output size and the 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 side S1 in the projection direction is perpendicular to the print head. In order to ensure that the print head does not collide with the sample, set the side printing x offset distance: 65μm and the side printing y offset distance: 160μm. Lower the print head to a height of 60μm from the bottom and move the print head according to the printing parameters in (2). The movement path is shown in Figure 8. After printing is completed, lift the print head.

[0128] (4) Rotate the loading mechanism counterclockwise so that the second target side S2, the third target side S3, and the fourth target side S4 are at the same angle as the first target side S1 in (3) respectively. 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 projection direction is downward and the print head is parallel to the center line of the first target angle A1. Set the offset distance of the angle printing to 300μm. Lower the print head to a height of 60μm from the bottom. Do not discharge the material. Move the print head to the lifting start point. Single-layer printing does not require lifting action. After discharging the material at the lifting start point for a period of time, lift the print head.

[0130] (6) Make the second target angle A2, the third target angle A3, and the fourth target angle A4 the same as the first target angle A1 in (5) in turn, and repeat the process of printing the first target angle A1 to complete the printing of the four target angles.

[0131] As shown in Figure 11, a single-layer dam was actually printed using the dam preparation method provided in this embodiment. It can be seen that the target corner and the adjacent side are sealed and connected, the printing accuracy is high, and it meets the requirements of high density and small size packaging.

[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 inner dam in a stacked manner on the rectangular sample wall includes:

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

[0134] (2) Select a print head with a diameter of 150μm and adjust the printing parameters, such as the material output size and the 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 side S1 in the projection direction is perpendicular to the print head. In order to ensure that the print head does not collide with the sample, set the side printing x offset distance: 50μm and the side printing y offset distance: 160μm. Lower the print head to a height of 60μm from the bottom and move the print head according to the printing parameters in (2). The reciprocating motion path is shown in Figure 9. Print a total of 10 layers and reciprocate 5 times. The lifting height of each layer is 50μm. At this time, the total thickness = 60 + 50 × 9 = 510μm. Since the laminated material may have a certain collapse, the actual total thickness will be less than 510μm. The number of printing layers or the lifting height of each layer can be increased according to the actual situation.

[0136] (4) Rotate the loading mechanism counterclockwise so that the second target edge S2, the third target edge S3 and the fourth target edge S4 are at the same angle as the first target edge S1 in (3) respectively. Repeat the process of printing the first target edge S1 to complete the stacked printing of the four target edges.

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

[0138] (6) Make the second target angle A2, the third target angle A3, and the fourth target angle A4 the same as the first target angle A1 in (5) in turn, and repeat the process of printing the first target angle A1 to complete the overlay printing of the four target angles.

[0139] This embodiment also provides a chip sealing dam fabrication apparatus, which is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0140] This embodiment provides a chip sealing dam preparation device, as shown in Figure 12. Printing material is extruded from the print head to form a dam on the inner side of the sample wall on the loading mechanism. The device includes:

[0141] The parameter acquisition module 1201 is used to acquire the dam parameters and determine multiple target edges and multiple target angles based on the dam parameters.

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

[0143] The edge printing module 1203 is used to control the rotation of the loading mechanism, so that multiple target edges are perpendicular to the plane where the print head is located in sequence, and the print head is moved according to the first preset trajectory requirements 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 centerlines of multiple target corners are in the same plane as the printing head, and the printing head is moved according to the second preset trajectory requirements to complete the printing of the target corners in the dam.

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

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

[0147] A single-layer edge printing unit is used to 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 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. 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 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 reciprocate between the printing start point and printing end point corresponding to each printing layer.

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

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

[0151] A single-layer corner printing unit is used to print a single layer based on the position of the target corner if the number of printing layers is 1.

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

[0153] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

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

[0155] This invention also provides a computer device having the chip sealing dam preparation apparatus shown in FIG12 above.

[0156] Please refer to Figure 13, which is a schematic diagram of a computer device according to an optional embodiment of the present invention. As shown in Figure 13, the computer device includes one or more processors 10, a memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components communicate with each other using different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on an external input / output device (such as a display device coupled to the interface). In some optional embodiments, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 13 shows an example of a single processor 10.

[0157] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0158] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0159] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

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

[0161] The computer device also includes a communication interface 30 for communicating with other devices or communication networks.

[0162] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded over a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

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

Claims

1. A method for preparing a chip sealing dam, wherein printing material is extruded from a printhead to form an inner dam on the inner side of the sample wall on a loading mechanism, characterized in that, The method includes: Obtain the dam parameters, and determine multiple target edges and multiple target angles based on the dam parameters; Control the print head to rotate to the preset starting position, and print the edges and corners of the dam to form a closed structure; The loading mechanism is controlled to rotate, so that multiple target edges are perpendicular to the plane where the print head is located in sequence, and the print head is moved according to the first preset trajectory requirements to complete the printing of the target edges in the dam; The loading mechanism is controlled to rotate, so that the centerlines of multiple target angles are in the same plane as the print head, and the print head is moved according to the second preset trajectory requirements 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 the printing of the target side in the dam includes: The height of the dam is determined based on the dam parameters, and the number of printing layers is determined based on the dam height and the preset layer height. If the number of printing layers is 1, the printing start point and printing end point of the target edge are determined according to the first preset offset distance and the second preset offset distance. 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 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. If the number of printing layers is greater than 1, the printing start point and printing end point corresponding to each printing layer on 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 reciprocate between the printing start point and 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 reciprocate between the print start and print end points corresponding to each print layer includes: Print each layer sequentially from the printing start point to the printing end point, following the order of increasing distance from the plane of the loading mechanism. The distance between the starting point of the current layer and the ending point of the previous layer is the lift 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 the printing of the target angle in the dam includes: Determine the height of the dam based on the dam parameters; If the number of printing layers is 1, print in a single step based on the position of the target corner; If the number of printing layers is greater than 1, the print head is raised and printed 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 printing head to lift and print, including: The starting and ending points for lifting the print head are determined based on 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 material after a preset time; According to the preset output speed and print head movement speed, the print head is controlled to lift and print from the lifting start point to the lifting end point.

6. The method according to claim 1, characterized in that, Controlling the loading mechanism to rotate, sequentially making multiple target edges perpendicular to the plane where the print head is located, and moving the print head according to a first preset trajectory to complete the printing of the target edges in the dam, including: Control the loading mechanism to rotate so that the initial target edge is perpendicular to the plane where the print head is located, and calculate the rotation angle of the remaining target edges relative to the initial target edge; Based on the rotation angle of the remaining target edges relative to the initial target edge, sort the remaining target edges from smallest to largest to obtain the edge sorting result; Based on the edge sorting results, 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 requirements 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, sequentially bringing the centerlines of multiple target angles into the same plane as the print head. The print head is moved according to a second preset trajectory to complete the printing of the target angles in the dam, including: Control the loading mechanism to rotate so that the centerline of the initial target angle is in the same plane as the print head, and calculate the rotation angle of the centerlines of the remaining target angles relative to the centerline of the initial target angle; Based on the rotation angle of the remaining target angles relative to the initial target angle median, the remaining target angles are sorted from smallest to largest to obtain the angle sorting result; Based on the angle sorting results, the centerlines of the remaining target angles are sequentially aligned with the print head in the same plane. The print head is then moved according to the second preset trajectory requirements to complete the printing of the target angles in the dam.

8. A chip sealing dam preparation apparatus, wherein printing material is extruded from a printhead to form an inner dam on the inner side of the sample wall on a loading mechanism, characterized in that, The device includes: The parameter acquisition module is used to acquire the dam parameters and determine multiple target edges and multiple target angles based on 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. The edge printing module is used to control the rotation of the loading mechanism, so that multiple target edges are perpendicular to the plane where the print head is located in sequence, and the print head is moved according to the first preset trajectory requirements 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 centerlines of multiple target corners are in the same plane as the printing head, and the printing 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, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1 to 7.

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