Rectifier diode for vehicle

Abstract

The utility model belongs to the technical field of semiconductors, and particularly relates to a vehicle rectifier diode. The utility model comprises: a crystal grain; the lead wire is arranged above the crystal grain; the copper particles are arranged below the crystal grains; the packaging body is arranged on the outer layer of the crystal grain and partially wraps the lead and the copper particles; the top surface of the copper base is provided with a recess, the packaging body and the copper particle are recessed in the recess, and the copper particle is welded with the top surface of the recess through a soldering lug; and a circle of fixing teeth are arranged on the peripheral surface of the copper base. The utility model is used for solving the technical problems that the production time is long and matched welding equipment is needed because the existing bump diode needs to be welded in the use process.

Description

Technical Field

[0001] The utility model belongs to the technical field of semiconductors, and in particular relates to a rectifier diode for a vehicle. Background Art

[0002] Automotive rectifier diodes come in a variety of types and have a wide range of applications. Among these automotive rectifier diodes is a type called the button series. This type of diode generally consists of an internal crystal grain, copper grains above and below the grain, and an external package that encapsulates the crystal grain and copper grain together, with only the outer end of the copper grain protruding from the package. These button automotive rectifier diodes require soldering leads to the outer end of the copper grain or welding to other circuit boards before use. This method is extremely cumbersome and requires supporting soldering equipment, which not only increases production time but also costs. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a vehicle rectifier diode to solve the technical problem that the existing button diode needs to be welded during use, resulting in a long production time and the need for matching welding equipment.

[0004] The utility model solves the above technical problems with the following technical solutions: A vehicle rectifier diode, comprising:

[0005] grains;

[0006] A lead, the lead being arranged above the die;

[0007] Copper particles, the copper particles are arranged below the crystal particles;

[0008] A package body, the package body being provided on the outer layer of the die and partially encapsulating the lead and the copper die;

[0009] A copper base, wherein a top surface of the copper base is provided with a recess, the package body and the copper particle are sunken in the recess, and the copper particle is welded to the top surface of the recess via a welding sheet;

[0010] The outer peripheral surface of the copper base is provided with a circle of fixed teeth.

[0011] The utility model pre-packages the leads, crystal grains and copper grains, and then welds the exposed copper grains to the copper base. When the automotive rectifier diode produced in this way is used, it only needs to embed the copper base into the rectifier bridge frame in an interference fit manner, and no further welding is required, so the welding step can be omitted.

[0012] Furthermore: the surfaces of the lead and the copper base are plated with a nickel layer.

[0013] The beneficial effect of adopting this step is that the nickel layer has good corrosion resistance, can protect the substrate from corrosion, and effectively extend the service life of the diode.

[0014] Furthermore, the lead, the grain, the copper grain and the copper base are coaxially welded.

[0015] The beneficial effects of this step are: the coaxial welding of the lead, die, copper grain and copper base can not only maintain a good welding effect, but also allow the package body to be evenly distributed around the die and copper grain, achieving a good packaging effect.

[0016] Furthermore: a concave hole is provided on the top surface of the cavity, and the copper particles are sunken in the concave hole.

[0017] The beneficial effect of adopting this step is that the concave hole and the cavity form a stepped shape, so that the copper particles can sink into the concave hole, and the bottom surface of the package body can contact the cavity. In this way, the package body contacts the cavity, and the copper particles contact the concave hole. The combination of the two makes the contact area between the copper particles, the package body and the copper base larger and more stable.

[0018] Furthermore: the fixed teeth are composed of a plurality of vertical convex teeth, and the plurality of convex teeth are evenly distributed on the outer peripheral surface of the copper base.

[0019] The beneficial effects of this step are: the vertical protruding teeth are easy to insert and remove, and the evenly distributed protruding teeth do not need to distinguish the insertion angle, which is more conducive to quick installation.

[0020] The beneficial effects of the utility model are:

[0021] The present application pre-installs leads on the top of the existing button diode and a copper base on the bottom, so that the button diode can be directly pressed when in use and installed on the rectifier bridge through interference fitting, so that the user no longer needs to perform welding, which not only improves the installation speed, but also saves the welding process and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic diagram of the structure of a vehicle rectifier diode provided by the utility model;

[0024] Figure 2A partial cross-sectional schematic diagram of a first embodiment of a vehicle rectifier diode provided by the utility model;

[0025] Figure 3 The figure is a partial cross-sectional schematic diagram of a second embodiment of a vehicle rectifier diode provided by the utility model.

[0026] Reference numerals:

[0027] 1-Chip; 2-Lead; 3-Copper chip; 4-Package; 5-Copper base; 6-Solder pad;

[0028] 51-concave; 52-concave hole. DETAILED DESCRIPTION

[0029] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0030] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] Example

[0036] like Figures 1 to 3 As shown, the present invention provides a vehicle rectifier diode, comprising:

[0037] Grain 1;

[0038] A lead 2, the lead 2 being provided above the die 1;

[0039] Copper grains 3, the copper grains 3 being disposed below the crystal grains 2;

[0040] A package body 4, which is provided on the outer layer of the die 1 and partially wraps the lead 2 and the copper die 3;

[0041] A copper base 5, wherein a recess 51 is formed on the top surface of the copper base 5, the package body 4 and the copper particle 3 are sunken in the recess 51, and the copper particle 3 is welded to the top surface of the recess 51 via a welding piece 6;

[0042] The outer circumference of the copper base 4 is provided with a circle of fixed teeth.

[0043] The present invention pre-packages the lead 2, the crystal grain 1 and the copper grain 3, and then welds the exposed copper grain 3 to the copper base 5. When the automotive rectifier diode produced in this way is used, it is only necessary to embed the copper base 5 into the rectifier bridge frame in an interference fit manner, and no further welding is required, so the welding step can be omitted.

[0044] On the basis of the above technical solution, the surfaces of the lead 2 and the copper base 5 are plated with a nickel layer.

[0045] The nickel layer has good corrosion resistance, can protect the substrate from corrosion, and effectively extend the service life of the diode.

[0046] On the basis of the above technical solution, the lead 2, the crystal grain 1, the copper grain 3 and the copper base 5 are coaxially welded.

[0047] The coaxially welded lead 2, die 1, copper die 3 and copper base 5 can not only maintain a good welding effect, but also allow the package body 4 to be evenly distributed around the die 1 and copper die 3, achieving a good packaging effect.

[0048] On the basis of the above technical solution, a concave hole 52 is provided on the top surface of the cavity 51 , and the copper particles 3 are trapped in the concave hole 52 .

[0049] The concave hole 52 cooperates with the cavity 51 to form a stepped shape, so that the copper particle 3 can sink into the concave hole 52, and the bottom surface of the package body 4 can contact the cavity 51. In this way, the package body 4 contacts the cavity 51, and the copper particle 3 contacts the concave hole 52. The combination of the two makes the contact area between the copper particle 3, the package body 4 and the copper base 5 larger and more stable.

[0050] On the basis of the above technical solution, the fixed teeth are composed of a plurality of vertical protruding teeth, and the plurality of protruding teeth are evenly distributed on the outer peripheral surface of the copper base 5 .

[0051] The vertical protruding teeth are easy to insert and remove, and the evenly distributed protruding teeth do not need to distinguish the insertion angle, which is more conducive to quick installation.

[0052] In addition, the top and bottom edges of the copper base 5 are chamfered to facilitate plugging and unplugging with the rectifier bridge.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rectifier diode for automobile, characterized in that: include: grains; A lead, the lead being arranged above the die; Copper particles, the copper particles are arranged below the crystal particles; A package body, the package body being provided on the outer layer of the die and partially encapsulating the lead and the copper die; A copper base, wherein a top surface of the copper base is provided with a recess, the package body and the copper particle are sunken in the recess, and the copper particle is welded to the top surface of the recess via a welding sheet; The outer peripheral surface of the copper base is provided with a circle of fixed teeth.

2. The automotive rectifier diode according to claim 1, characterized in that: The surfaces of the lead and the copper base are plated with a nickel layer.

3. The automotive rectifier diode according to claim 1, characterized in that: The lead, the crystal grain, the copper grain and the copper base are coaxially welded.

4. The automotive rectifier diode according to claim 1, characterized in that: A concave hole is provided on the top surface of the cavity, and the copper particles are sunken in the concave hole.

5. The automotive rectifier diode according to claim 1, characterized in that: The fixed teeth are composed of a plurality of vertical convex teeth, and the plurality of convex teeth are evenly distributed on the outer peripheral surface of the copper base.

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