Showa Shinku Co., Ltd.

John R Leitz

System for frequency adjustment of piezoelectric resonators by ion etching in vacuum, based on arranging the resonators in rows and columns on a tray that can be moved to simultaneously expose two rows of resonators to the two straight-track portions of an ion gun having a race-track-shaped beam pattern whose straight tracks are spaced at an integer multiple of the inter-row spacing d. As the tray is moved in steps of d, two rows can be etched simultaneously, and each row can be sequentially exposed to a &ldquo;pre-etch&rdquo; and &ldquo;final-etch&rdquo; stage, with time between the two stages for the resonators to cool down after the &ldquo;pre-etch&rdquo; stage.

Growing community of inventors

Victoria, Australia

John R Leitz