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Environment-friendly bolt type power electronic rectification chip forming process

A technology of rectifier chips and power electronics, which is applied in circuits, electrical components, manufacturing tools, etc., can solve problems such as hindering the health of workers and excessive lead solder, and achieve the effect of improving environmental protection index, good appearance and performance, and expanding the application market

Pending Publication Date: 2020-10-02
HUANGSHAN HENGYUE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an environmentally friendly bolt-type power electronic rectifier chip forming process to solve the problem that the existing bolt-type rectifier chip adopts the lead-filling process and lead-tin alloy as the solder forming chip. health problems

Method used

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] like figure 1 As shown, an environmentally friendly bolt-type power electronic rectifier chip molding process includes the following steps:

[0038] (1) Prepare multiple tin-copper alloy solder sheets and lead-tin alloy solder sheets, wherein the weight percentage of tin in each tin-copper alloy solder sheet is 96%~98%, and the weight percentage of copper is 4%~2%, And the proportion of tin and the proportion of copper in multiple tin-copper alloy solder pieces are the same;

[0039] In step (1), the weight percentage of tin in the tin-copper alloy solder sheet may be 96%, or 97%, or 98%, and the weight percentage of copper may be 4%, or 3%, or 2%. Wherein the optimal value is 97% by weight of tin and 3% by weight of copper. The weight percentage of each component in the lead-tin alloy solder sheet is the same as that of all the lead-tin alloy...

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Abstract

The invention discloses an environment-friendly bolt type power electronic rectification chip forming process which comprises the following steps: (1) preparing a plurality of tin-copper alloy soldering lugs and lead-tin alloy soldering lugs, wherein the weight percentage of tin in the tin-copper alloy soldering lugs is 96%-98%, and the weight percentage of copper in the tin-copper alloy solderinglugs is 4%-2%; (2) sequentially filling the tin-copper alloy soldering lugs, the lead-tin alloy soldering lugs, a cathode molybdenum plate, a siliceous rectification chip and an anode molybdenum plate into a die hole of each graphite sintering die; (3) feeding the plurality of graphite sintering dies into a vacuum chamber of a horizontal vacuum sintering furnace; and (4) carrying out sintering and molding by using the horizontal vacuum sintering furnace. According to the invention, tin-copper (97:3) alloy replaces lead-tin (95:5) alloy material to be used as the cathode and anode surface weld-aid layers of the rectification chip product, so that the environmental protection index of the product is greatly improved, the application market of the product is expanded, the production efficiency of the product is greatly improved, and the phenomenon that the traditional lead enameling process affects the health is avoided.

Description

technical field [0001] The invention relates to the field of rectifier chip molding technology, in particular to an environmentally friendly bolt-type power electronic rectifier chip molding technology. Background technique [0002] Power electronic rectifier chips (hereinafter referred to as: rectifier chips) are usually divided into two types: bolt type and flat type. Bolt type rectifier chips refer to the process of packaging devices, which are suitable to be drawn out from the chip electrodes (cathode and anode) by "welding" process The type of rectifier chip with wires; and the flat type rectifier chip refers to the type of rectifier chip that is suitable for using the "crimping" process to lead out wires from the chip electrodes in the process of packaging devices. [0003] Bolt-type rectifier chips are the core components for manufacturing small and medium power rectifier devices or equipment (such as single-phase and three-phase rectifier bridges, etc.), which are wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/50H01L21/60B23K1/008B23K3/08B23K101/36
CPCH01L21/50H01L24/83B23K1/008B23K3/082B23K2101/36H01L2224/8309H01L2224/8384H01L2224/83411H01L2224/83416H01L2224/83447H01L2224/83355
Inventor 洪忠健洪藏华
Owner HUANGSHAN HENGYUE ELECTRONICS
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