Chip-type round bump lead frame welding mold

Abstract

The utility model provides a kind of piece type round convex point lead frame welding mould, it is related to lead frame welding technical field, piece type round convex point lead frame welding mould, including mould body, one side of the mould body is equipped with two recesses, two recesses and the convex in middle make the mould body form convex character shape;Positioning pin that is adapted with the piece to be welded is equipped on the recess;Needle hole is set through being set up on the mould body;Multiple material placing grooves one are set up on the convex in middle, the end of each material placing groove one meets two recesses, and a face of mould body is jointly constituted, for the welding of manual production line lead frame, by forming a face and b face that are adapted with the piece to be welded on the two sides of welding mould, utilize the structure design of two different faces, solve the problem that existing welding mould cannot be applicable to different production line processing, realize that same welding mould can be applicable to different processing production line.

Description

Technical Field

[0001] This utility model relates to the field of lead frame welding technology, specifically to a plate-type round bump lead frame welding mold. Background Technology

[0002] During semiconductor manufacturing, a soldering process is required for the lead frame. During soldering, a soldering mold is used to support the pre-treated lead frame so that it can be soldered.

[0003] In the prior art, when welding lead frames, a welding zone is formed on the welding mold. The alternating depressions and protrusions in the welding zone are adapted to the workpiece to be welded. Currently, in the lead frame welding production process, welding is often carried out using manual or automatic production lines. Since manual and automatic production lines have different requirements for the stability of the lead frame and the welding mold, different welding molds are needed for welding in order to better adapt to the corresponding production lines and improve welding efficiency.

[0004] However, existing welding molds are not suitable for processing on different production lines, leading to inconvenience and increased production costs. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this utility model provides a sheet-type circular bump lead frame welding mold, which solves the problem that existing welding molds cannot be applied to different production lines.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: In this utility model, the sheet-type circular protrusion lead frame welding mold includes a mold body, one side of which is provided with two recesses, and the two recesses and the middle protrusion make the mold body form a convex shape. The recess is provided with a positioning pin that is compatible with the part to be welded; The mold body is provided with a through-hole ejector pin; The central protrusion has multiple material placement slots, and the end of each material placement slot intersects with two recesses to form surface a of the mold body, which is used for welding the lead frame of the manual production line. The other side of the mold body is provided with two limiting grooves. Each limiting groove has a protrusion on both sides. Multiple material placement grooves are provided on the protrusion in the middle, which correspond one-to-one with the material placement groove. The end of each material placement groove intersects with the two limiting grooves to form the b-side of the mold body, which is used for welding the lead frame of the automatic production line. The material storage tank one and the material storage tank two are connected by a weld hole; The component to be welded is a sheet-type circular bump lead frame.

[0007] Furthermore, an avoidance hole is provided in the recess; The positioning pin includes a positioning part and an installation part; The outer diameter of the positioning part is adapted to the diameter of the hole opened on the workpiece to be welded, so that the positioning pin can position the workpiece to be welded. The outer diameter of the mounting part is larger than the outer diameter of the positioning part, and it is located inside the clearance hole.

[0008] Furthermore, the center of each pin hole is collinear with the center of multiple welding holes inside the corresponding material feeding groove.

[0009] Furthermore, a limiting hole adapted to the positioning pin is provided in the limiting groove; When multiple molds are stacked, the limiting hole on the upper mold is fitted onto the positioning pin.

[0010] Furthermore, an avoidance groove is provided on surface B of the mold body.

[0011] Furthermore, the mold body is provided with positioning holes.

[0012] (III) Beneficial Effects This invention provides a welding mold for a sheet-type circular bump lead frame. Compared with the prior art, it has the following advantages: By forming surfaces a and b on both sides of the welding mold that are adapted to the workpiece to be welded, and by utilizing the different structural designs of the two surfaces, the welding mold can be simultaneously adapted to both manual and automatic production lines while meeting the welding requirements of the same model of sheet-type circular bump lead frame. This solves the problem that existing welding molds cannot be used on different production lines, enabling the same welding mold to be used on different processing production lines. This reduces the processing cost of lead frame welding parts on semiconductor processing production lines and is conducive to the promotion and application of welding molds. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of a welding mold for a sheet-type circular bump lead frame; Figure 2 for Figure 1 A three-dimensional image; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 A 3D image after being flipped; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 for Figure 1 A bottom view; Figure 7 for Figure 1 Sectional view of AA; Figure 8 for Figure 7 A magnified view of point C in the middle.

[0015] Figure label: 1. Mold body; 10. Recess; 101. Ejector pin hole; 102. Clearance hole; 103. Positioning pin; 11. Material placement groove one; 111. Welding hole; 12. Material placement area; 13. Positioning hole; 2. Clearance groove; 20. Limiting groove; 201. Limiting hole; 21. Material placement groove two. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] This application provides a chip-type circular bump lead frame welding mold, which solves the problem that existing welding molds cannot be applied to different production lines. It enables the same welding mold to be used on different processing production lines, reduces the processing cost of the lead frame welding part on the semiconductor processing production line, and is conducive to the promotion and application of welding molds.

[0018] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0019] like Figures 1-8 As shown, a sheet-type circular bump lead frame welding mold includes a mold body 1. One side of the mold body 1 is provided with two recesses 10. The two recesses 10 and the middle protrusion make the mold body 1 form a convex shape. The recess 10 is provided with a positioning pin 103 that is adapted to the part to be welded; The mold body 1 is provided with a through-hole 101 for ejector pins; The central protrusion has multiple material placement grooves 11, and the end of each material placement groove 11 intersects with two recesses 10 to form the a-side of the mold body 1, which is used for welding the lead frame of the manual production line. The other side of the mold body 1 is provided with two limiting grooves 20. Each limiting groove 20 has a protrusion on both sides. Multiple material placement grooves 21 corresponding to material placement groove 11 are opened on the middle protrusion. The end of each material placement groove 21 intersects with the two limiting grooves 20 to form the b surface of the mold body 1, which is used for welding the lead frame of the automatic production line. The material storage tank 11 and the material storage tank 21 are connected by a weld hole 111; The component to be welded is a sheet-type circular bump lead frame; When in use, the part to be welded is placed in close contact with side a or side b, and the entire part to be welded is located within the material placement area 12. The round protrusions on the part to be welded are positioned within the corresponding welding holes 111.

[0020] By forming surfaces a and b on both sides of the welding mold to match the workpiece to be welded, and by forming a convex shape on surface a during setup, and using the positioning pin 103 set on surface a to fix the workpiece to be welded to the mold body 1, the stability requirements of the manual welding production line after the workpiece to be welded is met. Furthermore, the mold body 1 is provided with ejector pin holes 101 to facilitate the removal of lead wire frames after subsequent welding. Two limiting grooves 20 are set on surface b, so that surface b forms the shape of two concave characters horizontally merged. The limiting grooves 20 are used to limit the placement of the workpiece to be welded, which can meet the stability requirements of the automatic production line for the workpiece to be welded. When removing the material after welding, only the mold body 1 needs to be moved. This solves the problem that existing welding molds cannot be used on different production lines, enabling the same welding mold to be used on different processing production lines. This reduces the processing cost of lead frame welding parts on semiconductor processing production lines and is conducive to the promotion and application of welding molds.

[0021] like Figures 2-3 As shown, more specifically, a clearance hole 102 is provided in the recess 10; The positioning pin 103 includes a positioning part and an installation part; The outer diameter of the positioning part is adapted to the diameter of the hole opened on the workpiece to be welded, so that the positioning pin 103 positions the workpiece to be welded. The outer diameter of the mounting part is larger than the outer diameter of the positioning part, and it is located inside the clearance hole 102.

[0022] By setting a clearance hole 102 and installing a mounting part with an outer diameter larger than the positioning part inside the clearance hole 102 for shielding, the contact area between the positioning pin 103 and the mold body 1 is increased, the installation contact area is improved and the stability is increased, and the part to be welded can be fitted on the positioning part of the positioning pin 103 and fit against surface a, thus meeting the welding requirements of the part to be welded.

[0023] like Figures 1-5 As shown, the center of the ejector pin hole 101 is collinear with the center of the multiple solder holes 111 inside the corresponding material placement groove 11. This design is based on the fact that the main body (the part with the chip) of the chip-type circular bump lead frame is located in the corresponding material placement groove 11 or the material placement groove 21. By making the center of the ejector pin hole 101 collinear with the center of the multiple solder holes 111 inside the corresponding material placement groove 11, when the ejector pin pushes out the lead frame, the main body of the chip-type circular bump lead frame is more stable than other hollowed-out parts. Pushing the outer frame of the main body can effectively prevent the lead frame after welding from being easily damaged when it is pushed out.

[0024] like Figures 4-5 As shown, the limiting groove 20 is provided with a limiting hole 201 that is adapted to the positioning pin 103; When multiple molds 1 are stacked, the limiting hole 201 on the upper mold 1 is fitted onto the positioning pin 103, which increases the stability of the two molds 1 after stacking, and facilitates the placement and transportation of multiple welding molds.

[0025] like Figures 2-3 as well as Figure 6 As shown, a clearance groove 2 is provided on the B surface of the mold body 1. By providing the clearance groove 2, it is easy to pick up the mold body 1 when the B surface is placed horizontally with the B surface facing down.

[0026] Similarly, depending on the requirements, clearance groove 2 can also be set on surface a to facilitate the use of mold 1.

[0027] like Figure 2 As shown, more specifically, the mold body 1 is provided with a positioning hole 13. When using a manual production line, the positioning hole 13 is used to install the mold body 1 onto the bracket.

[0028] During work: Pre-processing to form the component to be soldered: The chip is installed on the corresponding position of the round bump on the lower frame using solder paste. After applying solder paste to the corresponding position, the upper frame is installed to form a whole for use as the component to be soldered. When processing the workpiece to be welded using a manual production line: the pre-treated workpiece to be welded is placed on surface a of mold body 1. At this time, the side of the workpiece to be welded that is close to surface a is completely attached to surface a and located in the material placement area 12. When the part to be welded is placed inside the mold body 1, the hole on the part to be welded is fixed on the positioning part of the corresponding positioning pin 103. Then, manual welding is performed. After welding, the part to be welded needs to be ejected from the mold body 1 by using an ejector pin through the ejector pin hole 101 on the mold body 1, so that the part to be welded is removed from the positioning pin 103, and the material removal operation of the part to be welded is completed. When processing the workpiece to be welded using an automated production line, the pre-treated workpiece is placed on surface b of the mold body 1. At this time, the side of the workpiece to be welded that is close to surface b is completely in contact with surface b, and the outer frame of the workpiece in the length direction is embedded in the limiting groove 20. The limiting groove 20 is used to limit the width of the workpiece to be welded, and the material placement groove 21 is used to limit the length of the workpiece to be welded. The limiting groove 20 on surface b replaces the recess 10 on surface a, which can achieve the limitation of the length of the workpiece to be welded in the mold body 1, and can meet the stability requirements of the automated production line for the workpiece to be welded placed in the mold body 1. After welding is completed, the mold body 1 can be flipped over to remove the workpiece to be welded.

[0029] In summary, based on the different stability requirements of different production lines when placing the workpieces to be welded inside the mold 1, different surfaces of the mold 1 are selected as the placement surfaces for the workpieces to be welded. The mold 1 provided in this application can meet the usage requirements of different production lines. It should be noted that the alternating concave and convex shapes formed by the a and b surfaces of this application are adapted to the shape of the sheet-type circular bump lead frame, thereby enabling the sheet-type circular bump lead frame to fit snugly against the mold 1 when placed inside the mold body 1, thus meeting the subsequent welding requirements. Furthermore, the alternating concave and convex shapes formed by surfaces a and b enable the placement of the plate-type circular bump lead frame. The dimensions related to the alternating concave and convex shapes are determined based on the relevant model dimensions of the plate-type circular bump lead frame to ensure compatibility with the corresponding plate-type circular bump lead frame.

[0030] Based on practical application, this application is suitable for promotion and use in developing small and medium-sized enterprises. During the transition from manual production lines to automated production lines, this application can be well applied. Furthermore, the alternating concave and convex shapes formed on both sides of the welding mold in this application are integrally formed with the mold body 1, making the entire welding mold simple to produce and capable of mass production, thus meeting actual production and usage needs.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A welding mold for a sheet-type circular bump lead frame, characterized in that, Includes a mold body, one side of which has two recesses, and the two recesses and the central protrusion form a convex shape for the mold body; The recess is provided with a positioning pin that is compatible with the part to be welded; The mold body is provided with a through-hole ejector pin; The central protrusion has multiple material placement slots, and the end of each material placement slot intersects with two recesses to form surface a of the mold body, which is used for welding the lead frame of the manual production line. The other side of the mold body is provided with two limiting grooves. Each limiting groove has a protrusion on both sides. Multiple material placement grooves are provided on the protrusion in the middle, which correspond one-to-one with the material placement groove. The end of each material placement groove intersects with the two limiting grooves to form the b-side of the mold body, which is used for welding the lead frame of the automatic production line. The material storage tank one and the material storage tank two are connected by a weld hole; The component to be welded is a sheet-type circular bump lead frame.

2. The sheet-type circular bump lead frame welding mold as described in claim 1, characterized in that, An avoidance hole is provided in the recess; The positioning pin includes a positioning part and an installation part; The outer diameter of the positioning part is adapted to the diameter of the hole opened on the workpiece to be welded, so that the positioning pin can position the workpiece to be welded. The outer diameter of the mounting part is larger than the outer diameter of the positioning part, and it is located inside the clearance hole.

3. The sheet-type circular bump lead frame welding mold as described in claim 1, characterized in that, The center of each pin hole is collinear with the center of multiple welding holes inside the corresponding material feeding groove.

4. The sheet-type circular bump lead frame welding mold as described in claim 1, characterized in that, The limiting groove is provided with a limiting hole that is compatible with the positioning pin; When multiple molds are stacked, the limiting hole on the upper mold is fitted onto the positioning pin.

5. A sheet-type circular bump lead frame welding mold as described in claim 1, characterized in that, An avoidance groove is provided on surface B of the mold body.

6. The sheet-type circular bump lead frame welding mold as described in claim 1, characterized in that, The mold body has positioning holes.

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