SOT23 lead frame with high row number

Abstract

The utility model discloses a high-row-number SOT23 lead frame, and belongs to the technical field of integrated circuits. The lead frame comprises a frame body, the upper edge of the frame body is provided with multiple groups of positioning holes which are arranged at intervals along the transverse direction of the frame body, and the lower edge of the frame body is provided with multiple groups of identification holes which are arranged at intervals along the transverse direction of the frame body and are arranged in one-to-one correspondence with the multiple groups of positioning holes. A plurality of rows of small unit groups which are arranged at intervals along the vertical direction of the whole frame are arranged between each group of positioning holes and each group of identification holes which are correspondingly arranged, the plurality of rows of small unit groups form a column, and each row of small unit groups comprises a plurality of small units which are arranged at intervals along the transverse direction of the whole frame. The method has the beneficial effects that materials are fully utilized, the material cost input is reduced, the plastic packaging time is effectively prolonged, the production efficiency is improved, the typesetting density of a plastic packaging mold is reduced, and the cost input of the mold is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of integrated circuits, and in particular relates to a SOT23 lead frame with a high number of rows. Background Art

[0002] As the chip carrier of integrated circuits, the lead frame is a key structural component that uses bonding materials (gold wire, aluminum wire, copper wire) to achieve electrical connection between the internal circuit lead ends of the chip and the external leads to form an electrical circuit. It serves as a bridge to connect to external wires and is also the main way to dissipate heat inside the chip. Lead frames are required in most semiconductor integrated blocks and are an important basic material in the electronic information industry.

[0003] like Figure 1 As shown in the figure, it is an existing SOT23-12R lead frame. It can be seen that the existing SOT23 lead frame generally has 12 rows of small units, each row of small units corresponds to a group of positioning holes and identification holes, and each row of small units and plastic sealing channels and cutting straight holes are arranged relatively loosely, not only the material utilization rate is relatively low, but also the production efficiency is low, which cannot meet the existing market demand for 23 products. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a SOT23 lead frame with a high number of rows, which solves the problems of existing similar SOT23 lead frame products with a small number of rows, a loose arrangement, low material utilization, high material cost, relatively more mold accessories and a large initial investment; through new product research and development, while meeting the needs of domestic and foreign markets, the production efficiency of the product is significantly improved, thereby solving at least one technical problem involved in the background technology.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] An embodiment of the present application provides a high-row SOT23 lead frame, including a frame as a whole, wherein a plurality of groups of positioning holes are arranged at intervals along the lateral direction of the frame as a whole at the upper edge of the frame as a whole, and a plurality of groups of identification holes are arranged at intervals along the lateral direction of the frame as a whole and are arranged one-to-one with the plurality of groups of positioning holes at the lower edge of the frame as a whole, and a plurality of rows of small unit groups are arranged spaced apart from each other along the vertical direction of the frame as a whole between each group of the positioning holes and each group of the identification holes arranged corresponding to it, and the plurality of rows of the small unit groups form a column, and each row of the small unit groups includes a plurality of small units arranged spaced apart along the lateral direction of the frame as a whole, and along the lateral direction of the frame as a whole, elliptical injection molding runners and rectangular cutting holes are cross-arranged between each group of the small unit groups.

[0007] As a preferred improvement of the utility model, each group of the positioning holes includes a positioning circular hole and a positioning elliptical hole; each group of the identification holes includes two identification holes arranged in parallel and at intervals.

[0008] As a preferred improvement of the present invention, the diameter of the positioning circular hole is 1.524 mm, the hole length of the positioning elliptical hole is 0.508 mm, and the diameter of the identification hole is 1.000 mm.

[0009] As a preferred improvement of the present invention, each row of the small unit groups includes four small units.

[0010] As a preferred improvement of the utility model, the small unit is respectively provided with three inner pins and outer pins at the top and the bottom, and the inner and outer pins are connected by connecting ribs.

[0011] As a preferred improvement of the present invention, the overall length of the frame is 271.6 mm, the width is 83 mm, and the thickness is 0.127 mm.

[0012] As a preferred improvement of the present invention, stress release grooves and air holes are provided between each row of the small unit groups along the vertical direction of the entire frame.

[0013] As a preferred improvement of the present invention, the frame as a whole includes 64 columns and 17 rows of the small unit groups.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] By increasing the number of SOT23 rows, with four small units in a group, the spacing between small units is reduced, so that the material can be fully utilized and the material cost investment can be reduced. At the same time, the compact structure of the product can effectively improve the plastic sealing time, increase production efficiency, reduce the layout density of the plastic sealing mold, and reduce the cost investment of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of an existing SOT23-12R lead frame;

[0018] Figure 2 This is a schematic diagram of the overall structure of a high-row SOT23-17R lead frame provided by the utility model;

[0019] Figure 3 This is a schematic structural diagram of multiple small units provided by the utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0022] See also Figure 2 and Figure 3 As shown, an embodiment of the present application provides a high-row SOT23 lead frame, including a frame as a whole 1, wherein the upper edge of the frame as a whole 1 is provided with a plurality of groups of positioning holes arranged at intervals along the lateral direction of the frame as a whole 1, and the lower edge of the frame as a whole 1 is provided with a plurality of groups of identification holes 13 arranged at intervals along the lateral direction of the frame as a whole 1 and arranged one by one with the plurality of groups of positioning holes.

[0023] Specifically, each group of the positioning holes includes a positioning circular hole 11 and a positioning elliptical hole 12; each group of the identification holes 13 includes two identification holes 13 arranged in parallel and at intervals.

[0024] The diameter of the positioning circular hole is 1.524 mm, the hole length of the positioning elliptical hole is 0.508 mm, and the diameter of the identification hole is 1.000 mm.

[0025] Between each group of the positioning holes and each group of the identification holes corresponding thereto, a plurality of rows of small unit groups are arranged spaced apart from each other in the vertical direction of the frame as a whole 1 , and the plurality of rows of small unit groups form a column.

[0026] Each row of the small unit groups includes a plurality of small units 14 spaced apart along the lateral direction of the frame as a whole 1 , and along the lateral direction of the frame as a whole 1 , elliptical injection molding channels 15 and rectangular cutting holes 16 are cross-arranged between each group of the small unit groups.

[0027] Specifically, each row of the small unit group includes four small units 14. Glue injection ports 145 are provided on both sides of each row of the small unit group to improve the glue injection efficiency of the elliptical injection flow channel 15 and reduce the impact force on the pressure welding gold wire during glue injection.

[0028] The small unit 14 is provided with three inner pins 141 and outer pins 142 at the top and bottom, respectively. The inner and outer pins are connected by connecting ribs 143. Furthermore, the small unit 14 is also provided with a seagull-shaped base island 144.

[0029] The frame as a whole 1 has a length of 271.6 mm, a width of 83 mm, and a thickness of 0.127 mm.

[0030] The outer pins 142 between the small units 14 are symmetrical in vertical direction. Along the vertical direction of the frame 1, stress release grooves (not shown) and air holes (not shown) are provided between each row of the small unit groups, and the vertical spacing between two small units 14 is 4.48 mm.

[0031] The six external pins 142 of the small unit 14 are distributed on the upper and lower sides of the base island 144 . The width of the external pins 142 is 0.350 mm, and the spacing between the external pins 142 on the same side is 0.950 mm.

[0032] The base island 144 has a length of 1.726 mm and a width of 1.016 mm, and is designed as a seagull shape, which can increase the reliability of the base island plastic packaging process.

[0033] The frame assembly 1 includes 64 columns and 17 rows of the small unit groups.

[0034] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0035] In addition, it should be noted that the scope of the methods and systems in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0036] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A high-row SOT23 lead frame, characterized in that: It includes a frame as a whole, wherein the upper edge of the frame as a whole is provided with a plurality of positioning holes spaced apart along the lateral direction of the frame as a whole, and the lower edge of the frame as a whole is provided with a plurality of identification holes spaced apart along the lateral direction of the frame as a whole and arranged one-to-one with the plurality of positioning holes, and between each group of the positioning holes and each group of the identification holes corresponding thereto are a plurality of rows of small unit groups spaced apart from each other along the vertical direction of the frame as a whole, and the plurality of rows of the small unit groups form a column, and each row of the small unit groups includes a plurality of small units spaced apart along the lateral direction of the frame as a whole, and along the lateral direction of the frame as a whole, elliptical injection molding runners and rectangular cutting holes are cross-arranged between each group of the small unit groups.

2. The high-row SOT23 lead frame according to claim 1, characterized in that: Each group of the positioning holes includes a positioning circular hole and a positioning elliptical hole; each group of the identification holes includes two identification holes arranged in parallel and at intervals.

3. The high-row SOT23 lead frame according to claim 2, characterized in that: The diameter of the positioning circular hole is 1.524 mm, the hole length of the positioning elliptical hole is 0.508 mm, and the diameter of the identification hole is 1.000 mm.

4. The high-row SOT23 lead frame according to claim 1, characterized in that: Each row of the small unit group includes four small units.

5. The high-row SOT23 lead frame according to claim 1 or 4, characterized in that: The small unit is respectively provided with three inner pins and outer pins at the top and the bottom, and the inner and outer pins are connected by connecting ribs.

6. The high-row SOT23 lead frame according to claim 1, characterized in that: The overall length of the frame is 271.6 mm, the width is 83 mm, and the thickness is 0.127 mm.

7. The high-row SOT23 lead frame according to claim 1, characterized in that: Along the vertical direction of the entire frame, stress release grooves and air holes are arranged between each row of the small unit groups.

8. The high-row SOT23 lead frame according to claim 1, characterized in that: The frame as a whole includes 64 columns and 17 rows of the small unit groups.

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