04328441 is referenced by 54 patents and cites 4 patents.

A pressure sensitive apparatus for producing electrical signals on two electrodes having a layered structure consisting of a conductive layer, a piezoelectric polymer film layer, an electrode layer, an insulating layer, another electrode layer, another piezoelectric polymer film layer, and another conductive layer. The layered structure may be constructed from an insulating layer sandwiched between two piezoelectric polymer films each having an electrode on one surface thereof and having a conductive plane on the other surface thereof disposed on each side of the insulating layer with the electrodes in closest proximity to the insulating film. Further, support substrates may be disposed on each side of the piezoelectric polymer films, the support substrates having an opening where the electrodes are located. Still, further, the apparatus may be adapted for a pressure sensitive matrix keyboard having a plurality of keyboard switch positions arranged in a plurality of rows and columns where the electrodes are a strip constituting one of the rows and columns, respectively, of the keyboard switch positions. The piezoelectric polymer film may be polyvinylidene fluoride and the layered structure may be integrally bonded or physically sandwiched together and may have connected to it an electrical sensing circuit suitable for amplifying a small charge pulse induced by the strain upon the piezoelectric polymer film.

Title
Output circuit for piezoelectric polymer pressure sensor
Application Number
6/117296
Publication Number
4328441
Application Date
January 31, 1980
Publication Date
May 4, 1982
Inventor
Richard A Norquist
St. Paul
MN, US
Frederick R Kroeger Jr
St. Paul
MN, US
Agent
William D Bauer
Donald M Sell
Cruzan Alexander
Assignee
Minnesota Mining and Manufacturing Company
MN, US
IPC
H01L 41/08
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