Lead frame material belt

Abstract

The utility model belongs to the technical field of lead frame production, and particularly relates to a lead frame material belt which comprises a material belt body, the upper portion and the lower portion of the material belt body are respectively provided with a plurality of frames A and frames B which are transversely arranged, and the lower ends of the frames A and the upper ends of the frames B are arranged in a staggered mode. The upper end of the frame A is arranged on the upper edge of the material belt body, and the lower end of the frame B is arranged on the lower edge of the material belt body. According to the utility model, two lead frame products can be punched at the same time, and the width of the material belt can be reduced, so that the material used by the material belt is saved, the production cost of the lead frame is reduced, the resource utilization rate of the material belt is improved, the production effect and the production efficiency of the lead frame products are ensured, and the die is suitable for mass production.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead frame production, and in particular relates to a lead frame material strip. Background Art

[0002] Lead frame is the chip carrier of integrated circuit. It is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to realize the electrical connection between the internal circuit lead end of the chip and the external lead to form an electrical circuit. The lead frame is made by punching a metal strip through a punch press. At present, the stamping method of using metal strip to form a single-row lead frame has the problems of low metal strip utilization, serious resource waste, high production cost and low efficiency.

[0003] There are studies in the prior art on the problems of stamping metal strips into single-row lead frames, such as patent application CN208336210U, a TO lead frame, etc., which uses the relatively staggered arrangement of the package unit pins to achieve the stamping of two adjacent rows of lead frames, solving the current problems of serious waste of resources, high production costs and low efficiency in forming single-row lead frames with metal strips. However, the existing metal strips formed with two adjacent rows of lead frames can only guarantee the production of a single product, but it is difficult to effectively control the width of the metal strip for the production of two products, resulting in serious waste of metal strip materials. Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0004] The utility model aims to provide a lead frame material strip to solve the problem mentioned in the background technology that it is difficult to effectively control the width of two products produced by the metal material strip at the current stage, resulting in serious material waste of the metal material strip.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lead frame strip, including a strip body, wherein the upper and lower parts of the strip body are respectively provided with a plurality of transversely arranged frames A and frames B with the same structure, the lower end of the frame A and the upper end of the frame B are staggered, the upper end of the frame A is arranged at the upper edge of the strip body, and the lower end of the frame B is arranged at the lower edge of the strip body.

[0006] Furthermore, the upper, middle and lower parts of the frame A are respectively configured as an upload segment A, a pin segment A and a download segment A; an upper transition segment A is connected between the upload segment A and the pin segment A; an upper end of the upper transition segment A is connected to a lower end of the upload segment A; an upper end of the upload segment A is arranged at an upper edge of the material strip body; a lower end of the upper transition segment A is connected to an upper end of the pin segment A; a lower transition segment A is connected between the pin segment A and the download segment A; an upper end of the lower transition segment A is connected to a lower end of the pin segment A; and a lower end of the lower transition segment A is connected to an upper end of the download segment A.

[0007] Furthermore, a U-shaped groove A is provided at the lower end of the download segment A and the upper end of the upload segment A, and the two ends of the U-shaped groove A at the lower end of the download segment A are staggered with the two sides of the upper end of the frame B respectively.

[0008] Furthermore, the upper, middle and lower parts of the frame B are respectively configured as an upload segment B, a pin segment B and a download segment B; an upper transition segment B is connected between the upload segment B and the pin segment B; an upper end of the upper transition segment B is connected to a lower end of the upload segment B, and a lower end of the upper transition segment B is connected to an upper end of the pin segment B; a lower transition segment B is connected between the pin segment B and the download segment B, an upper end of the lower transition segment B is connected to a lower end of the pin segment B, and a lower end of the lower transition segment B is connected to an upper end of the download segment B; and the lower end of the download segment B is arranged at the lower edge of the material strip body.

[0009] Furthermore, a U-shaped groove B is provided at the lower end of the download segment B and the upper end of the upload segment B, and the two ends of the U-shaped groove B at the upper end of the upload segment B are respectively staggered with the two ends of the U-shaped groove A at the lower end of the download segment A.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model adopts the setting of a plurality of frames A and frames B arranged transversely, so that the material strip body can achieve the purpose of producing two lead frame products, effectively improving the production efficiency of the lead frame products. By staggering the lower end of the frame A and the upper end of the frame B, the width of the material strip body is effectively controlled, effectively saving the material used in the material strip body, reducing the production cost of the lead frame, improving the resource utilization rate of the material strip body, ensuring the production effect of the lead frame product, and being suitable for mass production;

[0012] 2. The utility model adopts the setting of the upload segment, the lead segment and the download segment to form the frame A or the frame B, so that the frame A and the frame B also have the characteristics of a single lead frame product, so that the material strip body can achieve the purpose of producing two lead frame products, effectively improving the production efficiency of the lead frame products;

[0013] 3. The utility model makes the bending of the lead frame product more convenient and quick by respectively setting an upper transition section between the upper segment and the pin segment and between the lower transition section and the pin segment, and further makes the frame A or frame B easier to assemble by setting a U-shaped groove on the upper segment and the downloading segment, thereby effectively improving the assembly efficiency of the frame A and the frame B and ensuring the production efficiency of the lead frame product;

[0014] 4. The utility model utilizes the staggered arrangement of the two ends of the U-shaped groove A of the download segment A and the two ends of the U-shaped groove A of the upload segment B, so that the two lead frame products of frame A and frame B can be staggered on the material strip body, so that the width of the material strip body is effectively controlled, the material used in the material strip body is effectively saved, the production cost of the lead frame is reduced, the resource utilization rate of the material strip body is improved, the production effect of the lead frame product is guaranteed, and it is suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural schematic diagram of the material belt body of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle area A;

[0017] Figure 3 for Figure 2 Schematic diagram of the structure after bending;

[0018] Figure 4 for Figure 2 Schematic diagram of the structure after bending and trimming;

[0019] Figure 5 for Figure 2 Schematic diagram of the upper part of the structure;

[0020] Figure 6 for Figure 2 Schematic diagram of the lower part of the structure;

[0021] Figure 7 It is a schematic diagram of the side structure of the frame A or frame B of the utility model after forming a product.

[0022] Wherein: 1. Material strip body; 2. Frame A; 201. Upload segment A; 202. Pin segment A; 203. Download segment A; 204. Upper transition segment A; 205. Lower transition segment A; 206. U-shaped groove A; 3. Frame B; 301. Upload segment B; 302. Pin segment B; 303. Download segment B; 304. Upper transition segment B; 305. Lower transition segment B; 306. U-shaped groove B. DETAILED DESCRIPTION

[0023] The following examples are used to further illustrate the content of the utility model, but do not limit the application of the utility model.

[0024] See also Figure 1-Figure 7 A lead frame strip includes a strip body 1 for producing lead frame materials, wherein a plurality of frames A2 and frames B3 which are arranged laterally and have the same structure are respectively arranged at the upper and lower parts of the strip body 1, and the lead frame product is formed by stamping the strip body 1, wherein the lower end of the frame A2 and the upper end of the frame B3 are alternately arranged, the upper end of the frame A2 is arranged at the upper edge of the strip body 1, and the lower end of the frame B3 is arranged at the lower edge of the strip body 1.

[0025] See also Figure 1-Figure 5 and Figure 7 , the upper part, the middle part and the lower part of the frame A2 are respectively set as the upload segment A201, the pin segment A202 and the download segment A203, and the upload segment A201, the pin segment A202 and the download segment A203 are the main components constituting the frame A2 as a single lead frame product;

[0026] An upper transition section A204 for transition is connected between the upload segment A201 and the pin segment A202. The upper end of the upper transition section A204 is connected to the lower end of the upload segment A201. The upper end of the upload segment A201 is arranged at the upper edge of the material strip body 1. The lower end of the upper transition section A204 is connected to the upper end of the pin segment A202.

[0027] A lower transition segment A205 for transition is connected between the pin segment A202 and the download segment A203. The upper end of the lower transition segment A205 is connected to the lower end of the pin segment A202, and the lower end of the lower transition segment A205 is connected to the upper end of the download segment A203.

[0028] Both the lower end of the download segment A203 and the upper end of the upload segment A201 are provided with a U-shaped groove A206. The two ends of the U-shaped groove A206 at the upper end of the upload segment A201 are connected to the upper edge of the material belt body 1, and the two ends of the U-shaped groove A206 at the lower end of the download segment A203 are staggered with the two sides of the upper end of the frame B2.

[0029] See also Figure 1-Figure 4 and Figure 6-Figure 7 , the upper part, the middle part and the lower part of the frame B3 are respectively set as an upload segment B301, a pin segment B302 and a download segment B303, and the upload segment B301, the pin segment B302 and the download segment B303 are the main components constituting the frame B3 as a single lead frame product;

[0030] An upper transition segment B304 for transition is connected between the upload segment B301 and the pin segment B302. The upper end of the upper transition segment B304 is connected to the lower end of the upload segment B301, and the lower end of the upper transition segment B304 is connected to the upper end of the pin segment B302.

[0031] A lower transition section B305 for transition is connected between the pin section B302 and the downloading section B303. The upper end of the lower transition section B305 is connected to the lower end of the pin section B302, and the lower end of the lower transition section B305 is connected to the upper end of the downloading section B303. The lower end of the downloading section B303 is arranged at the lower edge of the material strip body 1.

[0032] A U-shaped groove B306 is provided at the lower end of the download segment B303 and the upper end of the upload segment B301. The two ends of the U-shaped groove B306 at the lower end of the download segment B303 are on the lower edge of the material strip body 1, and the two ends of the U-shaped groove B306 at the upper end of the upload segment B301 are respectively staggered with the two ends of the U-shaped groove A206 at the lower end of the download segment A203, so that the width of the material strip body 1 is reduced, thereby saving the material used in the material strip body 1.

[0033] The working principle and use process of this embodiment are as follows: Figure 1-Figure 7 As shown in the figure, two lead frame products are obtained at the same time after the lead frame strip is punched by a punching machine. Specifically: when two lead frame products need to be produced at the same time, the operator first places the strip body 1 (the strip body 1 is a metal strip, and a copper strip can be selected) on the mold of the punching machine (the functions and structures of conventional equipment such as punching machines are well known in the art, and the connection settings are also common knowledge, so they are not explained here and are not shown in the attached drawings), and then operates the punching machine to punch out the upper and lower parts of the strip body 1 into a plurality of horizontally arranged and structurally equal frames A2 and B3, and the lower end of frame A2 is staggered with the upper end of frame B3 (that is, the two ends of the U-shaped groove B306 at the upper end of the upload segment B301 are staggered with the two ends of the U-shaped groove A206 at the lower end of the download segment A203, respectively). Figure 1-Figure 4 As shown), in this way, not only can two lead frame products be stamped out at the same time, but also the width of the strip body 1 can be reduced, thereby saving the material used in the strip body 1, reducing the production cost of the lead frame, improving the resource utilization rate of the strip body 1, ensuring the production effect and production efficiency of the lead frame product, and being suitable for mass production;

[0034] After the two lead frame products are stamped, frame A2 and frame B3 are bent (the bent frame A2 and frame B3 are as shown in FIG. Figure 3 As shown), after bending, frame A2 and frame B3 are trimmed (frame A2 and frame B3 after trimming are as shown in Figure 4 After trimming, the final two lead frame products are obtained (the initial side view of a single lead frame product is shown in Figure 7 as shown).

Claims

1. A lead frame strip, comprising a strip body, characterized in that: The upper and lower parts of the material strip body are respectively provided with a plurality of transversely arranged frames A and frames B, the lower end of the frame A and the upper end of the frame B are staggered, the upper end of the frame A is arranged at the upper edge of the material strip body, and the lower end of the frame B is arranged at the lower edge of the material strip body.

2. A lead frame strip according to claim 1, characterized in that: The structure of the frame A is the same as that of the frame B.

3. A lead frame strip according to claim 2, characterized in that: The upper, middle and lower parts of the frame A are respectively configured as an upload segment A, a pin segment A and a download segment A; an upper transition segment A is connected between the upload segment A and the pin segment A; and a lower transition segment A is connected between the pin segment A and the download segment A.

4. The lead frame strip according to claim 3, characterized in that: The upper end of the upper transition section A is connected to the lower end of the upper upload segment A, the upper end of the upper upload segment A is arranged at the upper edge of the material strip body, and the lower end of the upper transition section A is connected to the upper end of the pin segment A.

5. The lead frame strip according to claim 3, characterized in that: The upper end of the lower transition section A is connected to the lower end of the pin section A, and the lower end of the lower transition section A is connected to the upper end of the download segment A.

6. The lead frame strip according to claim 3, characterized in that: The lower end of the download segment A and the upper end of the upload segment A are both provided with a U-shaped groove A, and the two ends of the U-shaped groove A at the lower end of the download segment A are staggered with the two sides of the upper end of the frame B respectively.

7. The lead frame strip according to claim 6, characterized in that: The upper, middle and lower parts of the frame B are respectively configured as an upload segment B, a pin segment B and a download segment B; an upper transition segment B is connected between the upload segment B and the pin segment B; and a lower transition segment B is connected between the pin segment B and the download segment B.

8. The lead frame strip according to claim 7, characterized in that: The upper end of the upper transition segment B is connected to the lower end of the upper segment B, and the lower end of the upper transition segment B is connected to the upper end of the pin segment B.

9. The lead frame strip according to claim 7, characterized in that: The upper end of the lower transition section B is connected to the lower end of the pin section B, the lower end of the lower transition section B is connected to the upper end of the download segment B, and the lower end of the download segment B is arranged at the lower edge of the material strip body.

10. The lead frame strip according to claim 7, characterized in that: The lower end of the download segment B and the upper end of the upload segment B are both provided with a U-shaped groove B, and the two ends of the U-shaped groove B at the upper end of the upload segment B are respectively arranged alternately with the two ends of the U-shaped groove A at the lower end of the download segment A.

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