Geometrical instruments
Patent
1979-06-19
1981-02-24
McCamish, Marion
Geometrical instruments
428119, 339 60C, 339 61R, 174 69, 174 73SC, 174 98, 338 13, 338 47, 338 99, 338114, 338220, B32B 700, H01C 1010
Patent
active
042523915
ABSTRACT:
Anisotropically pressure-sensitive electroconductive composite sheets are provided which have a very low electric conductive resistance in the direction perpendicular to the plane of the sheet when compressed with an adequate pressure in the direction but a high insulating resistance in all directions within the plane of the sheet. The composite sheets are constructed so that electrically conductive fibers are uniformly dispersed in the matrix of an electrically insulating substance, the average length of the fibers ranging from 20 to 80% of the thickness of the sheet, and are aligned in the direction substantially perpendicular to the plane. They are useful as a switching material in various miniaturized electronic circuits.
REFERENCES:
patent: 3359145 (1967-12-01), Salyer
McCamish Marion
Shin-Etsu Polymer Co. Ltd.
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