Membrane switch with means for impeding silver migration
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United States of America Patent
Stats
-
Jan 6, 1981
Grant Date -
N/A
app pub date -
Apr 16, 1979
filing date -
Apr 16, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A membrane switch has a first silver conductor formed on a flexible membrane and a second silver conductor formed on a substrate, which may also be a flexible membrane. A spacer is positioned between and adhesively secured to the substrate and membrane in such a way that there is an opening in the spacer in register with the first and second conductors. Pressure applied to the membrane moves it toward the substrate through the opening in the spacer to cause electrical contact between the first and second conductors. There are means for impeding migration of the silver between the first and second conductors which essentially consists of orienting the conductors so as to provide the longest possible path between portions thereof.
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