IGBT (Insulated Gate Bipolar Translator) integrated S-shaped curved needle

Abstract

The utility model discloses an IGBT integrated S-shaped curved needle, and specifically relates to the IGBT technology field, the IGBT integrated S-shaped curved needle comprises an integrated body, the body comprises a rod body, one end of the rod body is provided with an S-shaped bending part, the other end of the rod body is provided with a guide head, and one end of the bending part is fixedly connected with a flat head pedestal with a T-shaped structure. According to the utility model, the body is provided with the S-bent bending part, the bending part has elasticity, and the S-bent part is in smooth transition, so that when the body is welded with a copper substrate, the stress borne when the body is connected with the substrate is dispersed, and the copper substrate is effectively protected, thereby reducing the damage risk caused by overlarge stress, preventing tension fracture and prolonging the service life; due to the design of the reticulate pattern part, the roughness of the surface of the flat head base is increased, more welding contact points are provided, solder balls can be better attached to the flat head base in the welding process, firmer welding connection is formed, and failure is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to IGBT technical field, concretely is a kind of IGBT integrated S bend needle. BACKGROUND

[0002] IGBT is insulated gate bipolar transistor, it is a kind of whether the semiconductor device controlled by control circuit to control to conduct, it has the advantages of both MOSFET's high input impedance and GTR's low on-voltage two aspects.IGBT module is a kind of modular electronic component integrated with multiple IGBT chips, drive circuit, protection circuit and other functions, with high voltage, large current, high frequency and other characteristics, widely used in various power electronic systems, such as frequency converter, new energy vehicle, wind power generation and other fields.

[0003] Through the retrieval, the utility model patent with disclosure number CN210182372U discloses a kind of IGBT's contact pin, improve the perpendicularity of contact pin, reduce solder joint, improve installation quality and use quality.

[0004] In the prior art, the contact pin is tinned or gold-plated as a whole, but when the contact pin is connected with the substrate, the substrate may be damaged, and tin needs to be used for soldering when connected with the substrate, and there is a risk of false soldering after tin soldering, which may cause product failure. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of IGBT integrated S bend needle to solve the problems mentioned in the above background.

[0006] The utility model mainly solves the technical problems of:

[0007] When the contact pin is connected with the substrate, the substrate may be damaged, and tin needs to be used for soldering when connected with the substrate, and there is a risk of false soldering after tin soldering, which may cause product failure.

[0008] The utility model can be realized by the following technical solutions:

[0009] A kind of IGBT integrated S bend needle, including integrally-formed body, the body includes stem, the one end of the stem is provided with S-bend-shaped bending part, and the other end of the stem is provided with guide head, one end of the bending part is fixedly connected with the head of T-shaped structure base, the top of the stem is connected with the head of T-shaped structure base through bending part, the bending part includes smooth transition arc part one and arc part two, the setting direction of arc part one and arc part two is opposite and arc length is same, arc part one is connected with the head of T-shaped structure base, and arc part two is connected with the stem.

[0010] Further technical improvement of the utility model lies in that the end surface of the head of T-shaped structure base is provided with netted part or smooth plane.

[0011] Further technical improvements of the utility model lie in that the guide head is provided with a circular truncated cone shape, the diameter of the upper part of the guide head is same with the diameter of the rod body, both are 1mm, and the diameter of the bottom of the guide head is less than the radius of the rod body, being 0.45mm.

[0012] Further technical improvements of the utility model lie in that the thickness of the bending part is less than the diameter of the bottom of the guide head, being 0.2mm, and the width of the bending part is greater than the diameter of the rod body, being 1.55mm.

[0013] Further technical improvements of the utility model lie in that the included angle formed between the extension line of the arc surface outside the guide head and the vertical edge of the corresponding rod body is 45 degrees.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、The body has the bending part of S bend, the bending part has elasticity, the S bend is smoothly transitioned, when being welded with the copper base plate, the stress received when being connected with the base plate is dispersed, the copper base plate is effectively protected, so that the damage risk caused by excessive stress is reduced, the risk of being pulled apart is prevented, and the service life is prolonged.

[0016] 2、The design of the netted part increases the roughness of the surface of the flat head base, more welding contact points are provided, the soldering ball is better adhered to the flat head base in the soldering process, more firm soldering connection is formed, and failure is prevented; in addition, the netted design can also increase the flowability of the soldering ball, so that the soldering ball can be more evenly distributed on the surface of the flat head base when being soldered, since the netted part increases the surface area of the surface of the flat head base, heat can be more quickly transmitted and dissipated, the temperature of the body in the working process is reduced, and the stability and service life of the body are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with the drawings.

[0018] Figure 1 It is the external structure schematic diagram of the utility model;

[0019] Figure 2 It is the plane structure schematic diagram of the utility model;

[0020] Figure 3 It is the three-dimensional structure schematic diagram of another embodiment of the utility model.

[0021] In the drawing: 1, rod body;2, bending part;3, flat head base;4, netted part;5, guide head. DETAILED DESCRIPTION

[0022] To further illustrate the technical means and effects taken by the utility model to achieve the predetermined utility model purposes, the following will combine with the drawings and the preferred embodiments to specifically explain the specific implementation, structure, features and effects of the utility model, and the details are as follows.

[0023] Embodiment 1

[0024] Please refer to Figure 1 and Figure 2 The utility model provides a kind of IGBT integrated S-bend needle, including integrally-formed body, body includes stem body 1, the one end of stem body 1 is provided with S-bend-shaped bending part 2, and the other end of stem body 1 is provided with guide head 5, and the one end of bending part 2 is fixedly connected with the flat head base 3 of T-shaped structure, the top of stem body 1 is connected with flat head base 3 via bending part 2, and bending part 2 includes smooth transition arc part one and arc part two, the setting direction of arc part one and arc part two is opposite and arc length is same, arc part one is connected with flat head base 3, and arc part two is connected with stem body 1, and the body in the application is made of copper, and metal plating layer is provided on the outer surface of body, to increase the strength of copper;Bending part 2 is bent by the mold that is accurately matched with the shape and size of body, and lubricant or coating is used in bending to reduce the friction between mold and body, to reduce the risk of plating damage, and bending part 2 forms S-bend after bending, and bending part has elasticity, effectively protects copper substrate when being welded with copper substrate, prevents cracking, and prolongs service life.

[0025] Please refer to Figure 1 The end surface of flat head base 3 is provided with netted part 4, the roughness of the surface of flat head base 3 is increased by the design of netted part 4, more welding contact points are provided, which helps soldering ball to better adhere to flat head base 3 in the welding process, forms more firm welding connection, and prevents failure;In addition, the design of netted part can also increase the flowability of soldering ball, so that it can be more evenly distributed on the surface of flat head base 3 when welding, since the netted part increases the surface area of the surface of flat head base 3, heat can be more quickly transferred and dissipated, which helps to reduce the temperature of body in the working process, improves its stability and life.

[0026] Please refer to Figure 1 The guide head 5 is provided as a circular truncated cone shape, the diameter of the upper part of guide head 5 is same with the diameter of stem body 1, and both are 1mm, and the diameter of the bottom of guide head 5 is less than the radius of stem body 1, which is 0.45mm.

[0027] The thickness of bending part 2 is less than the diameter of the bottom of guide head 5, which is 0.2mm, and the width of bending part 2 is greater than the diameter of stem body 1, which is 1.55mm.

[0028] The included angle formed between the extension line of the outer arc surface of guide head 5 and the vertical edge of corresponding stem body 1 is 25 degrees.

[0029] Embodiment 2

[0030] Different from embodiment 1, referring to Figure 3 As shown in the figure, the surface of the flat base 3 is provided as a smooth plane. Due to the smooth surface, the residual flux and solder balls are easier to clean after the welding is completed. According to different use scenarios, the flat base 3 with a smooth surface or the netted part 4 is used for targeted use, thereby increasing economic benefits.

[0031] In use, the body has a bending part 2 with an S-shaped bending part. The bending part has elasticity, which effectively protects the copper substrate during welding, prevents cracking, and prolongs the service life. The design of the netted part 4 increases the roughness of the surface of the flat head base 3, provides more welding contact points, helps the solder balls to better adhere to the flat head base 3 during the welding process, forms a more secure welding connection, and prevents failure. In addition, the netted design can also increase the flowability of the solder balls, so that they can be more evenly distributed on the surface of the flat head base 3 during welding. Since the netted part increases the surface area of the flat head base 3, heat can be transferred and dissipated more quickly, which helps to reduce the temperature of the body during operation, improves its stability and service life.

[0032] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as above with a preferred embodiment, it is not intended to limit the utility model. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the utility model. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model, which does not depart from the technical solution of the utility model, still belongs to the scope of the technical solution of the utility model.

Claims

1. An IGBT integrated S-bend needle comprising an integrally formed body, characterized in that: The body comprises a rod body (1), one end of the rod body (1) is provided with an S-shaped bending part (2), and the other end of the rod body (1) is provided with a guide head (5), one end of the bending part (2) is fixedly connected with a T-shaped flat head base (3), the top of the rod body (1) is connected with the flat head base (3) through the bending part (2), the bending part (2) comprises arc part one and arc part two, the setting directions of the arc part one and the arc part two are opposite and the arc lengths are the same, the arc part one is connected with the flat head base (3), and the arc part two is connected with the rod body (1).

2. The IGBT integrated S-bend needle of claim 1, wherein, The end surface of the flat head base (3) is provided with a netted part (4) or a smooth plane.

3. The IGBT integrated S-bend needle of claim 1, wherein, The guide head (5) is provided in a circular truncated cone shape, the diameter of the upper part of the guide head (5) is the same as that of the rod body (1), and is 1mm, and the diameter of the bottom of the guide head (5) is smaller than the radius of the rod body (1), and is 0.45mm.

4. The IGBT integrated S-bend needle of claim 3, wherein, The thickness of the bending part (2) is smaller than the diameter of the bottom of the guide head (5), and is 0.2mm, and the width of the bending part (2) is greater than the diameter of the rod body (1), and is 1.55mm.

5. The IGBT integrated S-bend needle of claim 1, wherein, The included angle formed between the extension line of the outer arc surface of the guide head (5) and the vertical edge of the corresponding rod body (1) is 25 degrees.

Images