US Government As Represented by the Secretary of the Army

Sally M Laffey

John R Vig

Mary A Hendrickson

An improved quartz resonator is obtaind using a mask which is kept in intte contact with the quartz substrate during the electrode metallization.

Method of metallizing a quartz resonator

A piezoelectric material langasite, having a defect free surface is obtai by polishing the surface of the material with a colloidal silica suspension diluted with water to about 10 to 30% concentration by weight and etching the surface of the polished piezoelectric material in an approximate 1:50:150 solution of HCl:HF:H.sub.2 O at about 70.degree. C.

Method of polishing langasite

An adherent gold film is deposited onto an oxide substrate by cleaning the xide surface so as to remove all contaminants and then vacuum depositing onto the clean oxide surface a gold film of up to 40 nm in thickness.

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Eatontown, NJ, United States of America

Sally M Laffey