Method for manufacturing multi-layered high-deformation piezoele

Details Method for manufacturing multi-layered high-deformation piezoele Method for manufacturing multi-layered high-deformation piezoele

1998-07-21

2000-02-29

Yao, Sam Chaun

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156311, 29 2535, 29446, B32B 3104, B32B 3120, H01L 4122

Patent

active

060304804

ABSTRACT:
A method and apparatus for manufacturing prestressed piezoelectric actuators which maximizes output, and increases the precision and efficiency with which the multi-layer actuators are made. Individual layers of the piezoelectric actuators are automatically stacked and registered with respect to each other within press members prior to bonding the layers to each other with a thermoplastic adhesive. Compressive force is applied while heat is conductively transferred from a heating element to the actuator in order to raise the temperature of each of the layers above the melting point of the thermoplastic. The temperature of the heating element is then decreased until the temperature of the actuator layers drops to below the melting point of the thermoplastic adhesive, thereby bonding the layers. Compressive force is then released, and the actuators are removed, further cooled and polarized. The temperature of the actuator may be sensed, and the pressure and the heat applied to the actuator varied in accordance with the sensed temperature.

REFERENCES:
patent: 3532570 (1970-10-01), Cotter
patent: 3960635 (1976-06-01), La Roy et al.
patent: 5632841 (1997-05-01), Helbaum et al.
patent: 5891291 (1999-04-01), Okamoto et al.

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