Electrically insulating substrate

Details Electrically insulating substrate Electrically insulating substrate

1985-09-12

1987-08-25

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

156 89, 174 685, 264 60, 264 61, 427 96, 428209, 428210, 428247, 428256, 428901, B32B 1800, C04B 3574, C04B 3702, H05K 103

Patent

active

046892621

ABSTRACT:
An apparatus for fabricating composite porcelain substrates employing alternating layers of wire cloth and porcelain green sheet material is 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.

REFERENCES:
patent: 4572754 (1986-02-01), Bloom

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