Coating processes – Measuring – testing – or indicating – Thickness or uniformity of thickness determined
Patent
1982-12-30
1984-03-06
Newsome, John H.
Coating processes
Measuring, testing, or indicating
Thickness or uniformity of thickness determined
427 44, 427 531, 427 541, 427100, B05D 306
Patent
active
044354410
ABSTRACT:
The adjustment of the resonant frequency of a surface acoustical wave (SAW) evice is achieved utilizing the elastic deformation which occurs in a polymer when the polymer is energized. A film or patch of a polymer coating is applied to the substrate of the SAW device before sealing. The device is then subjected to an elevated temperature, to precure the polymer, and sealed. After being sealed with an appropriate transparent material, the device is subjected to a polymer-energizing media such as a light beam, high temperature or an electron beam. The applied polymer patch is energized resulting in elastic deformation of the patch. The polymer deformation results in a change in the elastic stiffness of the piezoelectric medium and thereby a change in the resonant frequency of the device.
REFERENCES:
patent: 4015319 (1977-04-01), Levine
patent: 4107349 (1978-08-01), Vig
Ballato Arthur
Mariani Elio
Dougherty Anne Vachon
Gibson Robert P.
Murray Jeremiah G.
Newsome John H.
The United States of America as represented by the Secretary of
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