Lead frame with gutter

Abstract

The utility model relates to the technical field of lead frames, in particular to a lead frame with gutters, which comprises a plurality of lead frame groups, the lead frame groups are arranged side by side, each lead frame group comprises a plurality of lead modules arranged at intervals and a plurality of ribs used for connecting the lead modules, each lead module comprises a packaging area and an installation area, a plurality of water guide grooves are arranged between the packaging area and the installation area, each water guide groove comprises a first groove surface and a second groove surface, and the bottom wall of the second groove surface is lower than the bottom wall of the first groove surface. And the tin liquid flows from a high point to a low point more quickly and is finally discharged, so that the advantage that the tin liquid can be discharged more quickly is realized.

Description

Technical Field

[0001] The present application relates to the technical field of lead frames, and more specifically to a lead frame with a water guide groove. Background Art

[0002] The lead frame is a key structural component that uses bonding materials such as copper wire to achieve electrical connection between the internal circuit leads of the chip and the external leads.

[0003] Our company currently has a lead frame consisting of several Figure 1 The lead frame module shown in the figure is composed of a packaging area 901 and a mounting area 902. The packaging area 901 needs to be sealed with an external film by tinning. During sealing, tin liquid needs to be applied to the packaging area 901. In order to prevent the tin liquid from flowing into the mounting area 902, each lead frame module 90 has a water diversion groove 903. The water diversion groove 903 is located at the connection between the packaging area 901 and the mounting area 902. When the tin liquid is applied too much, the sealing personnel press the external film, and the excess tin liquid flows to the water diversion groove 903 and is discharged from the water diversion groove 903. However: the existing water diversion groove 903 is usually composed of one or more groove bodies with equal groove depth, and the bottom wall of the groove body is a plane, resulting in that when the lead frame module 90 is arranged horizontally, the speed at which the tin liquid flows out of the water diversion groove 903 is slow, affecting the overall packaging efficiency.

[0004] Therefore, there is a need to provide a lead frame with a water channel that helps the tin liquid to drain faster. Summary of the invention

[0005] The main purpose of the present application is to provide a lead frame with a water diversion groove, wherein the lead frame with a water diversion groove comprises a plurality of lead frame groups, the lead frame groups are arranged side by side, each of the lead frame groups comprises a plurality of lead modules arranged at intervals and a plurality of ribs for connecting the lead modules, each of the lead modules comprises a packaging area and an installation area, a plurality of water diversion grooves are provided between the packaging area and the installation area, each of the water diversion grooves comprises a first groove surface and a second groove surface, the bottom wall of the second groove surface is lower than the bottom wall of the first groove surface, and by setting the first groove surface and the second groove surface of different heights, the tin liquid can flow from a high point to a low point more quickly and finally be discharged, which has the advantage of facilitating the faster discharge of the tin liquid compared with the prior art.

[0006] Another object of the present application is to provide a lead frame with a water diversion groove, wherein each of the lead frame groups includes a first lead module, a second lead module and a third lead module, the first lead module and the third lead module have a first rectangular notch on one side close to the second lead module, the first lead module and the third lead module have a second rectangular notch on one side away from the installation area, the first rectangular notch and the second rectangular notch are both connected to the water diversion groove, the water diversion grooves of the first lead module and the third lead module are both composed of a first horizontal section and a first vertical section, and the first horizontal section and the first vertical section are spliced ​​to form an L shape, the through holes in the first lead module and the third lead module are located at the connection between the first horizontal section and the first vertical section, the second groove surfaces in the first horizontal section and the first vertical section are arranged obliquely, and the lowest point of the second groove surface in the first horizontal section faces the first rectangular notch, and the lowest point of the second groove surface in the first vertical section faces the second rectangular notch, and when the tin liquid flows into the second groove surface, it will quickly flow into the first rectangular notch or the second rectangular notch.

[0007] Another object of the present application is to provide a lead frame with a water diversion groove, wherein the water diversion groove of the second lead module is composed of a second horizontal section and a second vertical section, and the second horizontal section and the second vertical section are spliced ​​to form a T shape, and the through hole in the second lead module includes a waist-shaped hole and four circular holes, the waist-shaped hole and the two circular holes are arranged at intervals in the second horizontal section, and the remaining two circular holes are arranged at intervals in the second vertical section, and the second groove surface between the two circular holes of the second horizontal section is two symmetrically arranged inclined surfaces, and the intersection of the two inclined surfaces is the highest point of the bottom wall of the second groove surface, and when the tin liquid flows into the second groove surface, it will quickly flow into the circular holes along the two inclined surfaces.

[0008] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a lead frame with a water guide groove, wherein the lead frame with a water guide groove comprises:

[0009] A plurality of lead frame groups are arranged side by side, each of the lead frame groups comprises a plurality of lead modules arranged at intervals and a plurality of ribs for connecting the lead modules, each of the lead modules comprises a packaging area and a mounting area, a plurality of water diversion grooves are provided between the packaging area and the mounting area, each of the water diversion grooves comprises a first groove surface and a second groove surface, and a bottom wall of the second groove surface is lower than a bottom wall of the first groove surface.

[0010] In one or more embodiments of the present application, each of the lead frame groups includes a first lead module, a second lead module and a third lead module, and the first lead module and the third lead module have a first rectangular notch on a side close to the second lead module, and the first lead module and the third lead module have a second rectangular notch on a side away from the installation area, and the first rectangular notch and the second rectangular notch are both connected to the water diversion groove.

[0011] In one or more embodiments of the present application, the water guide groove of each of the lead modules has a plurality of through holes.

[0012] In one or more embodiments of the present application, the water diversion trough of the first lead module and the third lead module is composed of a first horizontal section and a first vertical section, and the first horizontal section and the first vertical section are spliced ​​to form an L shape, and the through hole in the first lead module and the third lead module is located at the connection between the first horizontal section and the first vertical section.

[0013] In one or more embodiments of the present application, the second groove surfaces in the first horizontal segment and the first vertical segment are arranged at an angle, and the lowest point of the second groove surface in the first horizontal segment faces the first rectangular notch, and the lowest point of the second groove surface in the first vertical segment faces the second rectangular notch.

[0014] In one or more embodiments of the present application, the water diversion groove of the second lead module is composed of a second horizontal section and a second vertical section, and the second horizontal section and the second vertical section are spliced ​​to form a T shape, and the through hole in the second lead module includes a waist-shaped hole and four circular holes, the waist-shaped hole and the two circular holes are arranged at intervals in the second horizontal section, and the remaining two circular holes are arranged at intervals in the second vertical section.

[0015] In one or more embodiments of the present application, the second groove surface between the two circular holes of the second horizontal section is two symmetrically arranged inclined surfaces, and the junction of the two inclined surfaces is the highest point of the bottom wall of the second groove surface.

[0016] In one or more embodiments of the present application, the second groove surface located between the waist-shaped hole and the circular hole in the second horizontal section is arranged inclined, and the lowest point of the second groove surface faces the waist-shaped hole.

[0017] In one or more embodiments of the present application, the first lead module and the third lead module have a plurality of sawtooth grooves on a side facing away from the mounting area, and the sawtooth grooves are connected to the second rectangular notch.

[0018] In one or more embodiments of the present application, the installation area of ​​each of the lead modules includes a plurality of bar holes and a plurality of positioning holes.

[0019] In an embodiment of the present application, a lead frame with a water diversion groove includes several lead frame groups, which are arranged side by side, each lead frame group includes several lead modules arranged at intervals and several ribs for connecting the lead modules, each lead module includes a packaging area and an installation area, and there are several water diversion grooves between the packaging area and the installation area, each water diversion groove includes a first groove surface and a second groove surface, and the bottom wall of the second groove surface is lower than the bottom wall of the first groove surface. By setting the first groove surface and the second groove surface of different heights, the tin liquid can flow from a high point to a low point more quickly and finally be discharged. Compared with the prior art, it has the advantage of helping the tin liquid to be discharged faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0021] Figure 1 The figure shows a structural schematic diagram of an existing lead frame module;

[0022] Figure 2 The figure shows a schematic structural diagram of a lead frame with a water diversion groove of the utility model;

[0023] Figure 3 Pictured Figure 2 A local enlarged view of point C;

[0024] Figure 4 Pictured Figure 2 A local enlarged view of D;

[0025] Figure 5 Pictured Figure 2 A schematic diagram of the local structure at another viewing angle at C;

[0026] Figure 6 Pictured Figure 2 Schematic diagram of the local structure at point D from another perspective. DETAILED DESCRIPTION

[0027] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0029] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0030] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0031] Application Overview

[0032] The existing water diversion groove is usually composed of one or more groove bodies with equal groove depth, and the bottom wall of the groove body is flat, resulting in that when the lead frame module is arranged horizontally, the speed at which the tin liquid flows out of the water diversion groove is slow, affecting the overall packaging efficiency.

[0033] Based on the above technical problems, the present application proposes a lead frame with a water groove, wherein the lead frame with a water groove has a simple structure, does not involve complicated manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the lead frame with a water groove provided by the present application is easy to produce and low in cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0034] Schematic diagram of a lead frame with water diversion grooves.

[0035] refer to Figures 2 to 6 According to a preferred embodiment of the present invention, a lead frame with a water diversion groove includes a plurality of lead frame groups 10 and a plurality of connectors 20 for connecting each of the lead frame groups 10 .

[0036] Specifically, Figure 2As shown, the lead frame groups 10 are arranged side by side and spaced a predetermined distance apart, and the connector 20 includes an end connecting strip 201 and a plurality of side connecting pieces 202, wherein the end connecting strip 201 is located at one end of each of the lead frame groups 10 and connected to the end of each of the lead frame groups 10, and the side connecting piece 202 is located at one end of the lead frame group 10 away from the end connecting strip 201, and a side connecting piece 202 is provided between two adjacent lead frame groups 10, and both ends of each of the side connecting pieces 202 are respectively connected to the corresponding two lead frame groups 10.

[0037] Furthermore, if Figure 2 As shown, each of the lead frame groups 10 includes a plurality of lead modules 101 arranged at intervals and a plurality of ribs 102 for connecting the lead modules 101 .

[0038] It should be noted that in the embodiments of the present application, Figure 2 As shown, the number of the lead modules 101 in each lead frame group 10 is three, and two adjacent lead modules 101 are connected with two ribs 102; in addition, each lead module 101 includes a packaging area 1011 and a mounting area 1012, and a plurality of water diversion grooves 1013 are provided between the packaging area 1011 and the mounting area 1012, such as Figure 3 and Figure 4 As shown, each of the water diversion grooves 1013 includes a first groove surface 10131 and a second groove surface 10132 , and the bottom wall of the second groove surface 10132 is lower than the bottom wall of the first groove surface 10131 .

[0039] It should be noted that by setting a plurality of groove surfaces of different heights in the water diversion groove 1013, when the excess overflowed tin liquid flows into the water diversion groove 1013, and in the process of flowing from the high groove surface to the low groove surface, part of the gravitational potential energy of the tin liquid is converted into kinetic energy, and the discharge of the tin liquid is accelerated. Compared with the prior art in which the groove surfaces of the water diversion groove 1013 are all flat and the groove depths are equal, the present application has the advantage of facilitating faster discharge of the tin liquid. It should also be pointed out that since the lead frame with the water diversion groove 1013 has a plurality of the lead frame groups 10, the small drainage advantages on a single lead frame group 10 can be accumulated multiple times, which can effectively reduce the overall drainage speed of the lead frame with the water diversion groove 1013, thereby improving the packaging efficiency, and has promotion value.

[0040] More specifically, in the embodiments of the present application, Figure 2As shown, the three lead modules 101 in each lead frame group 10 are respectively a first lead module 1014 , a second lead module 1015 and a third lead module 1016 , that is, each lead frame group 10 includes a first lead module 1014 , a second lead module 1015 and a third lead module 1016 .

[0041] To intuitively show that the first lead module 1014 and the third lead module 1016 are located at two sides during packaging, as shown in FIG. Figure 2 As shown, the first lead module 1014 and the third lead module 1016 have a first rectangular notch 10141 on one side close to the second lead module 1015, and the first lead module 1014 and the third lead module 1016 have a second rectangular notch 10142 on one side away from the installation area 1012, and the first rectangular notch 10141 and the second rectangular notch 10142 are both connected to the water diversion groove 1013.

[0042] It should be noted that, during packaging, tin liquid is applied to one side of the lead module 101, and the external film is pressed against the side of the lead module 101 coated with tin liquid. At this time, excess tin liquid flows into the water guide groove 1013, and flows along the water guide groove 1013 to the first rectangular notch 10141 or the second rectangular notch 10142 or the spacing area between two adjacent lead modules 101. After the external film on this side is bonded, the tin liquid flowing to the first rectangular notch 10141 or the second rectangular notch 10142 or the spacing area between two adjacent lead modules 101 is cleaned, and then the other side is packaged.

[0043] Furthermore, in order to facilitate the tin liquid to flow out faster, Figure 3 and Figure 4 As shown, the water guide groove 1013 of each lead module 101 has a plurality of through holes 1017 , that is, the tin liquid can also flow out from the through holes 1017 to improve the drainage efficiency.

[0044] Further, in the embodiments of the present application, Figure 3 As shown, the first lead module 1014 includes and the water diversion trough 1013 of the third lead module 1016 is composed of a first horizontal section 10133 and a first vertical section 10134, and the first horizontal section 10133 and the first vertical section 10134 are spliced ​​to form an L shape, and the through hole 1017 in the first lead module 1014 and the third lead module 1016 is located at the connection between the first horizontal section 10133 and the first vertical section 10134.

[0045] In addition, if Figure 4As shown, the water diversion trough 1013 of the second lead module 1015 is composed of a second horizontal section 10135 and a second vertical section 10136, and the second horizontal section 10135 and the second vertical section 10136 are spliced ​​to form a T shape, and the through hole 1017 in the second lead module 1015 includes a waist-shaped hole 10171 and four circular holes 10172, the waist-shaped hole 10171 and the two circular holes 10172 are arranged at intervals in the second horizontal section 10135, and the remaining two circular holes 10172 are arranged at intervals in the second vertical section 10136.

[0046] Furthermore, if Figure 2 , Figure 3 and Figure 5 As shown, the second groove surfaces 10132 in the first horizontal section 10133 and the first vertical section 10134 are arranged at an angle, and the lowest point of the second groove surface 10132 in the first horizontal section 10133 faces the first rectangular notch 10141, and the lowest point of the second groove surface 10132 in the first vertical section 10134 faces the second rectangular notch 10142.

[0047] It should be noted that, after the tin liquid flows toward the first horizontal section 10133 or the first vertical section 10134, it flows toward the second groove surface 10132 along the first horizontal section 10133 or the first vertical section 10134. Since the second groove surface 10132 is arranged at an angle, the tin liquid can easily flow toward the first rectangular notch 10141 or the second rectangular notch 10142 along the inclined second groove surface 10132, thereby realizing the rapid discharge of the tin liquid.

[0048] Furthermore, if Figure 2 , Figure 4 and 6 As shown, the second groove surface 10132 between the two circular holes 10172 of the second horizontal section 10135 is two symmetrically arranged inclined surfaces, and the intersection of the two inclined surfaces is the highest point of the bottom wall of the second groove surface 10132.

[0049] In addition, if Figure 4 As shown, the second groove surface 10132 located between the waist-shaped hole 10171 and the circular hole 10172 in the second horizontal section 10135 is arranged inclined, and the lowest point of the second groove surface 10132 faces the waist-shaped hole 10171 .

[0050] It should be noted that when the tin liquid flows to the two inclined surfaces of the second horizontal section 10135, it flows along the inclined surfaces into the corresponding circular holes 10172; when the tin liquid flows to the second groove surface 10132 between the waist-shaped hole 10171 and the circular hole 10172, it is quickly discharged from the waist-shaped hole 10171 along the second groove surface 10132. It should also be noted that the second groove surface 10132 is arranged in an inclined manner after stamping through the inclined convex block structure on the external stamping upper die.

[0051] Furthermore, if Figure 2 As shown, the first lead module 1014 and the third lead module 1016 have a plurality of sawtooth grooves 10143 on one side away from the mounting area 1012 , and the sawtooth grooves 10143 are connected to the second rectangular notch 10142 to meet packaging requirements.

[0052] In addition, if Figure 2 As shown, the installation area 1012 of each lead module 101 includes a plurality of strip holes 10121 and a plurality of positioning holes 10122 to facilitate installation and positioning. Specifically, each lead module 101 has one strip hole 10121, the first lead module 1014 has two positioning holes 10122, and the third lead module 1016 has one positioning hole 10122.

[0053] In summary, the lead frame with water guide grooves according to the embodiment of the present application is explained, which provides the lead frame with water guide grooves with advantages such as helping the tin liquid to be discharged faster.

[0054] It is worth mentioning that in the embodiment of the present application, the lead frame with water guide groove has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the lead frame with water guide groove provided by the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0055] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A lead frame with a water diversion groove, characterized in that: The lead frame with water diversion groove comprises A plurality of lead frame groups are arranged side by side, each of the lead frame groups comprises a plurality of lead modules arranged at intervals and a plurality of ribs for connecting the lead modules, each of the lead modules comprises a packaging area and a mounting area, a plurality of water diversion grooves are provided between the packaging area and the mounting area, each of the water diversion grooves comprises a first groove surface and a second groove surface, and a bottom wall of the second groove surface is lower than a bottom wall of the first groove surface.

2. The lead frame with water diversion groove according to claim 1, characterized in that: Each of the lead frame groups includes a first lead module, a second lead module and a third lead module, the first lead module and the third lead module have a first rectangular notch on a side close to the second lead module, the first lead module and the third lead module have a second rectangular notch on a side away from the installation area, and the first rectangular notch and the second rectangular notch are both connected to the water diversion groove.

3. The lead frame with water diversion groove according to claim 2, characterized in that: The water guide groove of each lead module is provided with a plurality of through holes.

4. The lead frame with water diversion groove according to claim 3, characterized in that: The water diversion groove of the first lead module and the third lead module are both composed of a first horizontal section and a first vertical section, and the first horizontal section and the first vertical section are spliced ​​to form an L shape, and the through hole in the first lead module and the third lead module is located at the connection between the first horizontal section and the first vertical section.

5. The lead frame with water diversion groove according to claim 4, characterized in that: The second groove surfaces in the first horizontal section and the first vertical section are arranged obliquely, and the lowest point of the second groove surface in the first horizontal section faces the first rectangular notch, and the lowest point of the second groove surface in the first vertical section faces the second rectangular notch.

6. The lead frame with water diversion groove according to claim 4, characterized in that: The water diversion groove of the second lead module is composed of a second horizontal section and a second vertical section, and the second horizontal section and the second vertical section are spliced ​​to form a T shape, and the through hole in the second lead module includes a waist-shaped hole and four circular holes, the waist-shaped hole and the two circular holes are arranged at intervals in the second horizontal section, and the remaining two circular holes are arranged at intervals in the second vertical section.

7. The lead frame with water diversion groove according to claim 6, characterized in that: The second groove surface between the two circular holes of the second horizontal section is two symmetrically arranged inclined surfaces, and the intersection of the two inclined surfaces is the highest point of the bottom wall of the second groove surface.

8. The lead frame with water diversion groove according to claim 7, characterized in that: The second groove surface located between the waist-shaped hole and the circular hole in the second horizontal section is arranged in an inclined manner, and the lowest point of the second groove surface faces the waist-shaped hole.

9. The lead frame with water diversion groove according to any one of claims 2 to 8, characterized in that: The first lead module and the third lead module each have a plurality of sawtooth grooves on one side away from the mounting area, and the sawtooth grooves are connected to the second rectangular notch.

10. The lead frame with water guide groove according to claim 9, characterized in that: The installation area of ​​each lead module includes a plurality of strip holes and a plurality of positioning holes.

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