Method and Apparatus for Correcting the Angles of Cut of Quartz Plates.
DEPARTMENT OF THE ARMY WASHINGTON DC
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An improvement in the technique of correcting the angles of cut of quartz resonator plates is disclosed. Photolytic etching the crystal blanks comprises the preferred method. Flat pack or pill-box type holders include masking members which mask the appropriate portion of the blank. Teflon and Kalrez comprise preferred materials for fabricating the masking elements since such materials are resistant to the etching material utilized. Mesas are formed during etching and the blanks are thereafter lapped to provide the desired angle of cut. When desirable, the masking element is withdrawn at a uniform rate during etching so that the angle is corrected without the need for lapping. Author
- Electrical and Electronic Equipment