Piezoelectric tone generator and a process for producing it
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United States of America Patent
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Mar 23, 1993
Issued Date -
N/A
app pub date -
May 10, 1991
filing date -
May 12, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To produce a piezoelectric tone generator, a layer of filler-free bonding agent whose dynamic viscosity is 800 to 18,000 mPa.multidot.s is applied between a metallized carrier plate and a piezoceramic wafer. The package composed of carrier plate, bonding layer and ceramic plate is pressed together, the quantity of bonding agent being chosen to be so large that during pressing a bead covering the edge of the ceramic wafer is formed. The bonding layer is cured thereafter, firstly catalytically or thermally and then by UV irradiation.
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