Method for manufacturing membranes
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United States of America Patent
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-
Nov 2, 2004
Grant Date -
Feb 5, 2004
app pub date -
Jul 31, 2002
filing date -
Jul 31, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for manufacturing membranes after having defined the button key position circuit and matrix layout under the conditions of without jumping and without generating ghost keys includes the steps of: heating and pre-shrinking the PET of a membrane, printing a circuit made from silver paste on the membrane, printing an insulation layer on the printed silver paste circuit or printing carbon powders, folding the membrane and welding the membrane by supersonic wave, and finally punching structural holes on the membrane to complete the membrane production.
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