Positioning jig for screen printing of chip

Abstract

The utility model relates to the technical field of chip packaging production, in particular to a positioning jig for chip silk-screen printing, which comprises a jig main body, a plurality of sliding chutes distributed at equal intervals are arranged on the upper end surface of the jig main body, a plurality of positioning grooves uniformly distributed are arranged on the inner bottom surfaces of the sliding chutes, and the positioning grooves are used for placing chips. A sliding groove is formed in the base, a positioning assembly connected with the sliding groove in a sliding mode is arranged in the sliding groove, the positioning assembly comprises two vertical elastic pieces, the two vertical elastic pieces are located on the two sides of the chip respectively, and the vertical elastic pieces are used for sliding along the inner wall of the sliding groove so that the chip protruding out of the positioning groove can be clamped or loosened. According to the utility model, the positioning groove plays a preliminary positioning role on the chip, and the chip can be clamped or loosened by moving the vertical elastic sheet in cooperation with the positioning assembly in the chute, so that the fixing effect is better compared with the fixing means such as vacuum adsorption, adhesive tape adhesion and the like; the chip can be fixed in the process of silk-screen printing and transportation to a sintering furnace for sintering and curing.

Description

Technical Field

[0001] The utility model relates to the technical field of chip packaging production, in particular to a positioning fixture used for chip screen printing. Background Art

[0002] In the field of sensor chip packaging, existing screen printing generally uses vacuum adsorption or tape adhesion technology to fix the sensor chip to be printed. The main shortcomings are:

[0003] (1) Vacuum adsorption has high requirements on chip shape and back surface flatness;

[0004] (2) When printing high-viscosity materials, vacuum adsorption cannot effectively adsorb and fix chips with a size of less than 2mm×2mm, and the chip is easily stuck to the printing screen and detached;

[0005] (3) Vacuum adsorption fixtures: Since the chip will move during transportation after losing the vacuum source, it cannot be directly sent to the sintering furnace to sinter and solidify the packaging material;

[0006] (4) Adhesion of the tape may cause contamination on the back of the chip. Also, due to the heat resistance of the tape, it cannot be directly sent to the sintering furnace.

[0007] (5) As sensor chips are generally small in size, if they cannot be directly sintered and solidified, the operation difficulty and manufacturing cost will increase. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides a positioning fixture for chip screen printing.

[0009] The utility model provides the following technical solution: a positioning jig for chip screen printing, comprising a jig body, the upper end surface of the jig body being provided with a plurality of equally distributed slide grooves, the inner bottom surface of the slide groove being provided with a plurality of evenly distributed positioning grooves, the positioning groove being used for placing the chip, the slide groove being provided with a positioning component slidably connected thereto, the positioning component comprising two vertical spring sheets, the two vertical spring sheets being respectively located on both sides of the chip, the vertical spring sheets being used to slide along the inner wall of the slide groove, thereby clamping or releasing the chip protruding from the positioning groove.

[0010] A positioning jig for chip screen printing according to an embodiment of the utility model is provided with a plurality of slide grooves on the jig body, and a plurality of positioning grooves are provided in each slide groove, so that the jig body can position and fix a plurality of chips at the same time. The positioning grooves play a preliminary positioning role for the chips, and cooperate with the positioning components in the slide grooves. Vertical spring plates are provided on both sides of the chip, and the chip can be clamped or released by moving the vertical spring plates. The operation is simple, and the fixing effect is better than that of vacuum adsorption, tape adhesion and other fixing means. The chip can be fixed during the process of screen printing and transportation to a sintering furnace for sintering and curing. The fixing effect is stable, and the production efficiency of small-size chips can be effectively improved.

[0011] Furthermore, a cover plate for covering all the positioning grooves is provided on the upper end of the fixture body, and a plurality of through holes corresponding to the positioning grooves are provided on the cover plate, and the upper end of the chip is embedded in the through holes and is flush with the upper end surface of the cover plate.

[0012] Furthermore, the upper end surface of the jig body is provided with a limiting groove adapted to the cover plate, the cover plate is embedded in the limiting groove, and the upper end surface of the cover plate is flush with the upper end surface of the jig body.

[0013] Furthermore, the vertical spring sheet has a plurality of positioning protrusions bent toward the chip, and the vertical spring sheet is used to move in the slide slot and clamp the chip when the positioning protrusions are located on the positive side of the chip.

[0014] Furthermore, the cross section of the positioning protrusion is arc-shaped, and the distance from the outer wall of the positioning protrusion to the inner wall of the slide groove is greater than or equal to the distance from the side wall of the chip to the inner wall of the slide groove.

[0015] Furthermore, the vertical spring sheet also has a plurality of locking grooves bent toward the chip, the positioning protrusion is located on the inner bottom wall of the locking groove, and the inner wall of the slide groove is provided with a plurality of locking point groups corresponding to the locking groove, and the locking point group includes two locking protrusions, one of which is used to abut against the inner wall of one side of the locking groove when the positioning protrusion moves to the side end of the chip and clamps the chip, and the other of the locking protrusions is used to abut against the inner wall of the other side of the locking groove when the positioning protrusion is misaligned with the chip and the chip is released.

[0016] Furthermore, the positioning assembly also includes two push plates, which are respectively located at the two ends of the vertical spring sheets, and the push plates are fixedly connected to the side ends of the two vertical spring sheets. When the vertical spring sheets clamp or release the chip, at least a portion of the push plates are located outside the slide groove.

[0017] Furthermore, the thickness of the push plate is the same as the height of the vertical spring piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a top view schematic diagram of the positioning fixture for chip screen printing of the utility model;

[0020] Figure 2 It is a front cross-sectional schematic diagram of a positioning fixture for chip screen printing of the utility model;

[0021] Figure 3 for Figure 2 A magnified schematic diagram of the local A in the middle;

[0022] Figure 4 It is a top view schematic diagram of the positioning jig for chip screen printing of the utility model with the cover plate removed;

[0023] Figure 5 for Figure 4 A magnified schematic diagram of the part B in the middle;

[0024] Figure 6 It is a top view schematic diagram of a fixture body in a positioning fixture for chip screen printing of the utility model;

[0025] Figure 7 It is a front cross-sectional schematic diagram of a fixture body in a positioning fixture for chip screen printing of the utility model;

[0026] Figure 8 It is a partial top view schematic diagram of a positioning component in a positioning fixture for chip screen printing of the utility model;

[0027] Fig. 9 It is a partial side view of a positioning component in a positioning fixture for chip screen printing of the present utility model;

[0028] Fig.10 It is a top view schematic diagram of a cover plate in a positioning fixture for chip screen printing of the present invention.

[0029] Description of reference numerals:

[0030] 10. Fixture body; 11. Slide groove; 111. Positioning groove; 112. Clamping point group; 1121. Clamping convex point; 12. Positioning assembly; 121. Vertical spring piece; 1211. Positioning convexity; 1212. Clamping groove; 122. Push plate; 13. Cover plate; 131. Through hole; 14. Limiting groove; 20. Chip. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] Reference Figures 1 to 10In one embodiment of the utility model, a positioning jig for screen printing of a chip 20 includes a jig body 10, the upper end surface of the jig body 10 is provided with a plurality of equally distributed slide grooves 11, the inner bottom surface of the slide groove 11 is provided with a plurality of evenly distributed positioning grooves 111, the positioning groove 111 is used to place the chip 20, the slide groove 11 is provided with a positioning component 12 slidably connected thereto, the positioning component 12 includes two vertical spring pieces 121, the two vertical spring pieces 121 are respectively located on both sides of the chip 20, the vertical spring pieces 121 are used to slide along the inner wall of the slide groove 11, so as to clamp or release the chip 20 protruding from the positioning groove 111.

[0036] In this embodiment, the chip 20 refers to a sensor chip with a size less than or equal to 2mm×2mm. In specific implementation, it can also be used for other small-sized chips, but is not limited to this. There are 7 slide grooves 11, and each slide groove 11 is provided with 6 positioning grooves 111. In specific implementation, the number of slide grooves 11 and positioning grooves 111 can be set according to the size of the fixture body 10, but is not limited to this.

[0037] A positioning jig for screen printing of a chip 20 according to an embodiment of the utility model is provided with a plurality of slide grooves 11 on a jig body 10, and a plurality of positioning grooves 111 are provided in each slide groove 11, so that the jig body 10 can simultaneously position and fix a plurality of chips 20, and the positioning grooves 111 play a preliminary positioning role for the chip 20, and cooperate with the positioning assembly 12 in the slide groove 11, vertical spring pieces 121 are provided on both sides of the chip 20, and the chip 20 can be clamped or released by moving the vertical spring pieces 121, and the operation is simple, and the fixing effect is better than that of fixing means such as vacuum adsorption and tape adhesion, and the chip 20 can be kept fixed during the process of screen printing and transportation to a sintering furnace for sintering and curing, and the fixing effect is stable, which can effectively improve the production efficiency of small-size chips 20.

[0038] The upper end of the fixture body 10 is provided with a cover plate 13 for covering all the positioning grooves 111. The cover plate 13 is provided with a plurality of through holes 131 corresponding to the positioning grooves 111. The upper end of the chip 20 is embedded in the through hole 131 and is flush with the upper end surface of the cover plate 13. The upper end surface of the fixture body 10 is provided with a limiting groove 14 adapted to the cover plate 13. The cover plate 13 is embedded in the limiting groove 14, and the upper end surface of the cover plate 13 is flush with the upper end surface of the fixture body 10. By setting the cover plate 13, the slide groove 11 and the inner part of the slide groove 11 can be fixed. The vertical spring piece 121 is shielded so that the chip 20 is exposed only from the through hole 131 on the cover plate 13, so that the packaging material does not fall into the slide groove 11 during screen printing, which affects the reuse of the vertical spring piece 121; the limiting groove 14 can limit the cover plate 13 so that the cover plate 13 is stably located at the upper end of the fixture body 10; in this embodiment, the screen printing operation is only performed on the cover plate 13, so that the packaging material does not fall into the slide groove 11 not covered by the cover plate 13, and the size of the through hole 131 is adapted to the chip 20.

[0039] The vertical spring piece 121 has a plurality of positioning protrusions 1211 bent toward the chip 20. The vertical spring piece 121 is used to move in the slide groove 11, and clamp the chip 20 when the positioning protrusion 1211 is located on the positive side of the chip 20; the cross section of the positioning protrusion 1211 is arc-shaped, and the distance from the outer wall of the positioning protrusion 1211 to the inner wall of the slide groove 11 is greater than or equal to the distance from the side wall of the chip 20 to the inner wall of the slide groove 11; by setting the positioning protrusion 1211, the chip 20 can be stably clamped, and the structure of the positioning protrusion 1211 ensures that it has good elasticity. Based on the size of the positioning protrusion 1211, when the positioning protrusion 1211 is located at the chip 20 When the chip 20 is on the positive side, an elastic force will be generated on the chip 20, and the positioning protrusions 1211 on both sides of the chip 20 will generate a force on it, thereby ensuring that the chip 20 is effectively fixed; in this embodiment, six positioning protrusions 1211 are provided on a single vertical spring piece 121, and the two vertical spring pieces 121 in the same slide groove 11 can move simultaneously to achieve synchronous clamping or release of all the chips 20 in the slide groove 11; the distance from the outer wall of the positioning protrusion 1211 to the inner wall of the slide groove 11 is slightly larger than the distance from the side wall of the chip 20 to the inner wall of the slide groove 11. If it is too large, it will affect the normal movement of the vertical spring piece 121 in the slide groove 11, and it is easy to push the chip 20 out of the positioning groove 111.

[0040] The vertical spring piece 121 also has a plurality of latching grooves 1212 bent toward the chip 20, the positioning protrusion 1211 is located on the inner bottom wall of the latching groove 1212, and a plurality of latching point groups 112 corresponding to the latching groove 1212 are provided on the inner wall of the slide groove 11, and the latching point group 112 includes two latching protrusions 1121, one of which is used to abut against the inner wall of one side of the latching groove 1212 when the positioning protrusion 1211 moves to the side end of the chip 20 and clamps the chip 20, and the other latching protrusion 1121 is used to abut against the inner wall of the other side of the latching groove 1212 when the positioning protrusion 1211 is misaligned with the chip 20 and the chip 20 is released; by providing the latching grooves 1212 and the latching protrusions 1121, it is possible to effectively control whether the chip 20 is in a clamped state or a relaxed state, and the operation is convenient.

[0041] In this embodiment, the slide grooves 11 are distributed front and back on the fixture body 10. Before placing the positioning component 12 into the slide groove 11, the cover plate 13 is first removed, and then the positioning component 12 is placed into the slide groove 11, and then the chip 20 is placed into the positioning groove 111, and finally the cover plate 13 is covered; when the positioning component 12 is placed into the slide groove 11, the clamping point group 112 corresponds to the clamping groove 1212, and the two clamping protrusions 1121 of each clamping point group 112 are located in the clamping groove 1 212; when the chip 20 needs to be clamped, the positioning component 12 is moved forward so that the rear side positioning protrusion 1121 abuts against the rear inner wall of the positioning groove 1212. At this time, the positioning protrusion 1211 is located on the positive side of the chip 20. When the chip 20 needs to be released, the positioning component 12 is moved backward so that the front side positioning protrusion 1121 abuts against the front inner wall of the positioning groove 1212. At this time, the positioning protrusion 1211 is completely misaligned with the chip 20.

[0042] The positioning assembly 12 also includes two push plates 122, which are respectively located at the two ends of the vertical spring pieces 121. The push plates 122 are fixedly connected to the side ends of the two vertical spring pieces 121, and when the vertical spring pieces 121 clamp or release the chip 20, at least part of the push plates 122 are located outside the slide groove 11; the thickness of the push plates 122 is the same as the height of the vertical spring pieces 121; the setting of the push plates 122 enables the two vertical spring pieces 121 to be controlled simultaneously, and the length of the push plates 122 can ensure that part of the push plates 122 is always located outside the slide groove 11, which is convenient for the staff to hold the push plates 122 to adjust the position of the vertical spring pieces 121; the thickness of the push plates 122 is the same as the height of the vertical spring pieces 121, ensuring that the vertical spring pieces 121 can be stably connected to the push plates 122, and that the push plates 122 can stably slide in the slide groove 11, and the plate-shaped push plates 122 also have good mechanical strength to ensure service life.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning fixture for chip screen printing, characterized in that: The jig comprises a jig body, wherein the upper end surface of the jig body is provided with a plurality of equally distributed slide grooves, the inner bottom surface of the slide groove is provided with a plurality of evenly distributed positioning grooves, the positioning groove is used to place the chip, the slide groove is provided with a positioning assembly slidably connected thereto, the positioning assembly comprises two vertical spring sheets, the two vertical spring sheets are respectively located on both sides of the chip, the vertical spring sheets are used to slide along the inner wall of the slide groove, thereby clamping or releasing the chip protruding from the positioning groove.

2. The positioning jig for chip screen printing according to claim 1, characterized in that: A cover plate for covering all the positioning grooves is disposed at the upper end of the fixture body, and a plurality of through holes corresponding to the positioning grooves are disposed on the cover plate. The upper end of the chip is embedded in the through hole and is flush with the upper end surface of the cover plate.

3. The positioning jig for chip screen printing according to claim 2, characterized in that: The upper end surface of the jig body is provided with a limiting groove adapted to the cover plate, the cover plate is embedded in the limiting groove, and the upper end surface of the cover plate is flush with the upper end surface of the jig body.

4. The positioning jig for chip screen printing according to claim 1, characterized in that: The vertical spring sheet has a plurality of positioning protrusions bent toward the chip. The vertical spring sheet is used to move in the slide slot and clamp the chip when the positioning protrusions are located on the positive side of the chip.

5. The positioning jig for chip screen printing according to claim 4, characterized in that: The cross section of the positioning protrusion is in an arc shape, and the distance from the outer wall of the positioning protrusion to the inner wall of the slide groove is greater than or equal to the distance from the side wall of the chip to the inner wall of the slide groove.

6. The positioning jig for chip screen printing according to claim 4, characterized in that: The vertical spring sheet also has a plurality of latching grooves bent toward the chip, the positioning protrusion is located on the inner bottom wall of the latching groove, and the inner wall of the slide groove is provided with a plurality of latching point groups corresponding to the latching groove, the latching point group includes two latching protrusions, one of the latching protrusions is used to abut against the inner wall of one side of the latching groove when the positioning protrusion moves to the side end of the chip and clamps the chip, and the other latching protrusion is used to abut against the inner wall of the other side of the latching groove when the positioning protrusion is misaligned with the chip and the chip is released.

7. The positioning jig for chip screen printing according to claim 1, characterized in that: The positioning assembly also includes two push plates, which are respectively located at the two ends of the vertical spring sheets. The push plates are fixedly connected to the side ends of the two vertical spring sheets, and when the vertical spring sheets clamp or release the chip, the push plates are partially located outside the slide groove.

8. The positioning fixture for chip screen printing according to claim 7, characterized in that: The thickness of the push plate is the same as the height of the vertical spring sheet.

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