Method for adjusting center frequency and bandwidth of monolithi

Details Method for adjusting center frequency and bandwidth of monolithi Method for adjusting center frequency and bandwidth of monolithi

1992-06-30

1997-07-01

Utech, Benjamin

Coating processes

Measuring, testing, or indicating

427 10, 427100, 427282, B05D 512

Patent

active

056436297

ABSTRACT:
Method and apparatus for adjusting the electrical parameters of monolithic crystal filters having an electrode pattern that includes resonator electrodes and inter-resonator gap and constitutes two coupled resonators, based on thin-film deposition on the electrode pattern of one side of the filter through a single-aperture mask, with mask and filter movable relatively to each other during the adjustment process, such as to be able to guide said deposition in response to measurements of said electrical parameters to any area of said electrode pattern for the purpose of adjusting said parameters to their target values.

REFERENCES:
patent: 3864161 (1975-02-01), Thompson
patent: 4112147 (1978-09-01), Thompson
patent: 4273812 (1981-06-01), Tsutsui et al.
patent: 4427711 (1984-01-01), Martin
patent: 4627379 (1986-12-01), Roberts et al.
patent: 4676993 (1987-06-01), Roberts et al.

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