Method of making an electrically insulative substrate

Details Method of making an electrically insulative substrate Method of making an electrically insulative substrate

1984-05-21

1986-02-25

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

428209, 428210, C04B 3326

Patent

active

045727546

ABSTRACT:
Method and apparatus for fabricating composite porcelain substrates employing alternating layers of wire cloth and porcelain green sheet material are disclosed, wherein those alternating layers are compressed toward one another at a somewhat elevated temperature and then kiln fired at a further elevated temperature to form a glazed porcelain surface for receiving further electrical circuitry, for example, of the microelectronic type. Such a composite porcelain substrate has good thermal properties of high conductivity and low coefficient of expansion as well as good electrical insulating properties and mechanical strength. In particular its thermal expansion properties are well matched to many surface mounted devices that may be placed on the substrate thereby reducing the likelihood of thermal damage of device connections. The substrate cost is very low in comparison to the currently available alternatives.

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patent: 4256796 (1981-03-01), Hang et al.
patent: 4296272 (1981-10-01), Schelhorn
patent: 4413061 (1983-11-01), Kumar et al.

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