A kind of preparation method of aluminum silicon carbide electronic packaging box body connector hole

Abstract

The invention relates to the field of electronic packaging, and discloses a method for preparing a connector hole of an aluminum silicon carbide electronic packaging box body. The method first manufactures a silicon carbide prefabricated part according to a set size and structure, and processes the porous silicon carbide prefabricated part. Mechanical features such as electrical connector holes and screw holes; secondly, pre-fill aluminum alloy powder or blocks in the holes to form silicon carbide prefabricated parts pre-embedded with aluminum alloy; and then prepare aluminum silicon carbide blanks by vacuum pressure infiltration body; finally, the blank body is machined, and the green body is processed into an aluminum silicon carbide box body with an electrical connector hole. The method can solve the difficult problem that the aluminum silicon carbide box body is difficult to machine the electrical connector hole, and is suitable for mass production. The prepared electrical connector hole has no casting defects, no interface microscopic cracks, and has good mechanical properties, which can ensure the airtightness of the box body after brazing the electrical connector, and can be widely used in the processing of microwave integrated circuits, hybrid integrated circuits, etc. Aluminum silicon carbide box body for electrical connector holes.

Description

technical field [0001] The invention relates to the field of electronic packaging, in particular to a method for preparing a connector hole of an aluminum silicon carbide electronic packaging box body. Background technique [0002] Silicon carbide reinforced aluminum matrix composite material (hereinafter referred to as aluminum silicon carbide), due to its high thermal conductivity and elastic modulus, low density and suitably adjustable expansion coefficient, is an ideal packaging material for microwave components. Electrical connectors have functions such as mechanical support, signal transmission, and hermetic packaging, and are widely used in microwave components. Since aluminum silicon carbide contains a large amount of silicon carbide reinforcement phase with extremely high hardness, it is difficult to process the mounting holes of the silicon carbide box electrical connector by mechanical means. [0003] In order to solve the problem that the electrical connector ho...

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Problems solved by technology

However, brittle intermetallic compounds such as Fe3Al and TiAl will be formed at the interface between the two, which will easily form microcracks and affect the airtightness of the packaging box.

[0005] Or prepare a layered silicon-silicon carbide preform first, and then use vacuum liquid phase pressure infiltration to infiltrate aluminum into the layered preform to obtain a layered aluminum-silicon-aluminum-silicon carbide composite material. Electrical connector holes and screw holes are processed on the softer aluminum silicon layer, but when the electrical connector holes pass through the aluminum silicon-aluminum silicon carbide interface, it is easy to crack at the junction of the two interfaces

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