CN218647930U

CN218647930U - Plastic package lead frame with split radiating fins

Info

Publication number: CN218647930U
Application number: CN202220675027.0U
Authority: CN
Inventors: 张富华; 鲍梅
Original assignee: Nantong Zhenxiong Electronics Technology Co ltd
Current assignee: Nantong Zhenxiong Electronics Technology Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2023-03-17
Anticipated expiration: 2032-03-24

Abstract

The utility model relates to a plastic envelope lead frame technical field specifically is a plastic envelope lead frame with components of a whole that can function independently fin, lead wire that openly set up including the lead frame and being located the lead frame, two spread grooves have been seted up in the front of lead wire, and the inside of spread groove is fixed with the inserted block, and the inside joint of spread groove has the shell fragment, has seted up the through hole on the shell fragment, is fixed with the fin between the front of two shell fragments. This plastic envelope lead frame with components of a whole that can function independently fin improves the stability of lead frame and pin line location through a locating hole and No. two locating holes, simultaneously under the effect of reference column, can be accurate find the position and carry out the plastic envelope and handle, and can be convenient for fix a position fin and pin line, also be convenient for simultaneously fix a position the conducting strip in the inside of base member, consequently can effectively improve the convenience, and under the packing of heat conduction silicone grease, can improve the stability that fin and conducting strip are connected.

Description

Plastic package lead frame with split radiating fins

Technical Field

The utility model relates to a plastic envelope lead frame technical field specifically is a plastic envelope lead frame with components of a whole that can function independently fin.

Background

The plastic package lead frame is used as a chip carrier of an integrated circuit, is a key structural member for realizing the electrical connection between a leading-out end of an internal circuit of a chip and an external lead by means of bonding materials (gold wires, aluminum wires and copper wires) to form an electrical circuit, plays a role of a bridge connected with an external lead, needs to be used in most semiconductor integrated blocks and is an important basic material in the electronic information industry.

At present, there is certain weak point in current plastic envelope lead frame when using, because the fin of general plastic envelope lead frame is concentrated to can reduce radiating effect, and all be fixed through the welded form, can lead to the fin to appear not hard up when the heat is higher, thereby can lead to the position to take place the skew when the plastic envelope, during metal connection, all can have the gap between, consequently also can lead to the fixity relatively poor.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a plastic envelope lead frame with components of a whole that can function independently fin has possessed the stability when improving the fin installation, also is convenient for simultaneously install advantages such as the fin, has solved the problem that can have the gap when current plastic envelope lead frame is not convenient for install and install.

(II) technical scheme

For the stability when realizing the installation of above-mentioned improvement fin, also be convenient for simultaneously install the purpose to the fin, the utility model provides a following technical scheme: the utility model provides a plastic envelope lead frame with components of a whole that can function independently fin, includes lead frame and the pin line that is located the positive setting of lead frame, two spread grooves have been seted up in the front of pin line, and the inside of spread groove is fixed with the inserted block, and the inside joint of spread groove has the shell fragment, has seted up the through hole on the shell fragment, is fixed with the fin between the front of two shell fragments.

Furthermore, a heat conducting fin is fixed on one side of the radiating fin, two extending columns are fixed on one side of the heat conducting fin, and limiting blocks are fixed outside the extending columns.

Further, the front of the lead frame is connected with a base body, the front of the base body is provided with heat dissipation holes, two inner holes are formed in the base body, and the front of the base body is provided with two filling ports.

Furthermore, a first positioning hole is formed in the front face of the lead frame, and a second positioning hole is formed between the lead frame and the pin line.

Furthermore, the front of the lead frame is provided with a pressure groove, and the front of the lead frame is fixed with a positioning column.

Further, the inside of hole and spread groove all is filled with heat conduction silicone grease.

(III) advantageous effects

Compared with the prior art, the technical scheme of the application has the following beneficial effects:

this plastic envelope lead frame with components of a whole that can function independently fin, improve the stability of lead frame and pin line location through a locating hole and No. two locating holes, simultaneously under the effect of reference column, can be accurate find the position carry out the plastic envelope and handle, and can be convenient for fix a position fin and pin line, also be convenient for fix a position the inside of base member with the conducting strip simultaneously, consequently can effectively improve the convenience, and under the packing of heat conduction silicone grease, can improve the stability that fin and conducting strip are connected.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a sectional view of the heat sink connecting structure according to the present invention;

fig. 3 is a partial front view of a lead connecting structure according to the present invention;

FIG. 4 is a left side view of the spring plate connecting structure of the structure of FIG. 2 according to the present invention;

fig. 5 is a bottom sectional view of the substrate connection structure of the present invention.

In the figure: the heat-conducting silicon chip comprises a lead frame 1, a pin line 2, a press groove 3, a positioning column 4, a positioning hole 5I, a connecting groove 6, an inserting block 7, a through hole 8, a spring plate 9, a heat radiating fin 10, a heat conducting fin 11, a base body 12, a heat radiating hole 13, a positioning hole 14 II, an extending column 15, a limiting block 16, an inner hole 17, a filling hole 18 and heat-conducting silicone grease 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-5, in the embodiment, the plastic package lead frame with the split heat sink includes a lead frame 1 and a lead wire 2 located on the front surface of the lead frame 1, the top end of the lead wire 2 is divided into two sections, the bottom end of the lead wire 2 is divided into three sections, two connecting grooves 6 are respectively formed on the front surfaces of the two sections on the top of the lead wire 2, insertion blocks 7 are respectively fixedly connected to the left and right side walls of the two connecting grooves 6, elastic pieces 9 are clamped inside the connecting grooves 6, through holes 8 are formed in the left sides of the elastic pieces 9, the through holes 8 are inserted into the insertion blocks 7, and heat sinks 10 are fixedly connected between the front surfaces of the two elastic pieces 9.

In addition, through the cooperation between the above-mentioned subassembly, can be through to the opposite side pressing shell fragment 9, be that shell fragment 9 inclines to warp, insert into spread groove 6 with shell fragment 9 in, when letting inserted block 7 and through hole 8 coincide, because shell fragment 9 has certain toughness to can resume the original form fast, consequently the inserted bar 7 inserts into through hole 8 in, thereby can be convenient for fix fin 10.

Wherein, the top fixedly connected with conducting strip 11 of fin 10, two extension posts 15 of the positive fixedly connected with of conducting strip 11, the outside fixedly connected with stopper 16 that extends post 15, the front welding of lead frame 1 has base body 12, the top of conducting strip 11 extends to the inside of base body 12, louvre 13 has been seted up in the front of base body 12, two holes 17 have been seted up to the front side wall of base body 12, the front one end that extends post 15 extends to the inside of hole 17, the diameter of stopper 16 is greater than the diameter of hole 17, two filling openings 18 have been seted up in the front of base body 12, filling opening 18 is linked together with hole 17.

In addition, through the cooperation between the above-mentioned subassembly, can be through the inside that extends to base member 12 with conducting strip 11 pushes down, conducting strip 11 possesses certain toughness simultaneously, consequently, when conducting strip 11 drove extension post 15 and hole 17 and coincide mutually, conducting strip 11 can be fixed a position in can going into the interior accuse with extension post 15 bullet, consequently, can play and fix a position conducting strip 11, simultaneously because the diameter of stopper 16 is greater than the diameter of hole 17, consequently, can cover one side of hole 17, consequently also be convenient for guide-in heat conduction silicone grease 19 through filling opening 18 and fix a position, also can not overflow the inside of base member 12 simultaneously.

Wherein, a locating hole 5 has been seted up on lead frame 1's front, and the shape of locating hole 5 is the hexagon, has seted up a plurality of No. two locating holes 14 between lead frame 1 and the lead wire 2, and indent 3 has been seted up on lead frame 1's front, and lead frame 1's front fixedly connected with reference column 4, and the inside of hole 17 and spread groove 6 all is filled with heat conduction silicone grease 19.

In addition, through the cooperation between the above-mentioned subassembly, can improve the location to lead frame 1 through locating hole 5, simultaneously under No. two locating holes 14's effect, improve the connection between pin line 2 and the lead frame 1, thereby can consolidate the fastness of connection, the indent 3 is the place chip region simultaneously, under the effect of reference column 4, calibrate when can effectively being convenient for the plastic envelope, thereby the deviation of emergence position during the plastic envelope, and under the effect of heat conduction silicone grease 19, can pour into hole 17 and spread groove 6 into, consequently, can fill inside space, and can improve the fastness that hole 17 and extension post 15 and inserted block 7 are connected with through hole 8, can avoid appearing becoming flexible simultaneously, also can play the effect of heat conduction simultaneously.

The working principle of the embodiment is as follows:

the pin wire 2 can be connected with the lead frame 1 through the second positioning hole 14, the substrate 12 is welded on the lead frame 1, then the heat conducting sheet 11 is pressed downwards, the heat conducting sheet 11 is made to be arc-shaped until the extension column 15 can be inserted into the substrate 12, when the extension column 15 is overlapped with the inner hole 17, the toughness of the heat conducting sheet 11 can drive the heat conducting sheet 11 to rebound and straighten, therefore, the extension column 15 can be inserted into the inner hole 17, the limiting block 16 covers and seals the back of the inner hole 17, connection between the heat conducting sheet 11 and the substrate 12 is completed, then the elastic sheet 9 is pressed in the opposite direction, the elastic sheet 9 is inserted into the connecting groove 6, when the through hole 8 in the elastic sheet 9 is overlapped with the insertion sheet 7, the insertion sheet 7 penetrates through the through hole 8, meanwhile, the elastic sheet 9 is restored to be straightened, therefore, the elastic sheet 9 can be positioned, the heat radiating sheet 10 can be positioned, then, the heat conducting silicone grease 19 can be injected into the connecting groove 6 and the filling port 18 through the positioning hole, the heat conducting grease 19 can reduce gaps in the connecting

groove

6 and 17, thereby avoiding the loosening of the plastic package, and achieving the effect of positioning through the first positioning hole 5, and the plastic package positioning, and the deviation can be avoided when the plastic package.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a plastic envelope lead frame with components of a whole that can function independently fin, includes lead frame (1) and is located lead frame (1) pin line (2) that openly set up, its characterized in that: two connecting grooves (6) are formed in the front face of each lead wire (2), an inserting block (7) is fixed inside each connecting groove (6), an elastic sheet (9) is clamped inside each connecting groove (6), a through hole (8) is formed in each elastic sheet (9), and a radiating fin (10) is fixed between the front faces of the two elastic sheets (9).

2. The plastic package lead frame with the split heat sink as claimed in claim 1, wherein: a heat conducting fin (11) is fixed on one side of the heat radiating fin (10), two extending columns (15) are fixed on one side of the heat conducting fin (11), and a limiting block (16) is fixed outside the extending columns (15).

3. The plastic package lead frame with the split heat sink as claimed in claim 1, wherein: the front surface of the lead frame (1) is connected with a base body (12), the front surface of the base body (12) is provided with a heat dissipation hole (13), two inner holes (17) are formed in the base body (12), and two filling ports (18) are formed in the front surface of the base body (12).

4. The plastic package lead frame with the split heat sink as claimed in claim 1, wherein: the front surface of the lead frame (1) is provided with a first positioning hole (5), and a second positioning hole (14) is formed between the lead frame (1) and the pin wire (2).

5. The plastic package lead frame with the split heat sink as claimed in claim 1, wherein: the front of the lead frame (1) is provided with a pressure groove (3), and the front of the lead frame (1) is fixed with a positioning column (4).

6. The plastic package lead frame with the split heat sink as claimed in claim 3, wherein: and heat-conducting silicone grease (19) is filled in the inner hole (17) and the connecting groove (6).