Metal working – Piezoelectric device making
Reexamination Certificate
2005-05-31
2005-05-31
Tugbang, A. Dexter (Department: 3729)
Metal working
Piezoelectric device making
C029S593000, C029S594000, C029S830000, C029S831000, C029S896220, C310S370000
Reexamination Certificate
active
06898832
ABSTRACT:
In a method for manufacturing a quartz crystal unit, a quartz crystal tuning fork resonator is formed by etching a quartz crystal wafer to form a quartz crystal tuning fork base, quartz crystal tuning fork tines connected to the quartz crystal tuning fork base, and a groove having stepped portions in at least one of opposite main surfaces of each of the quartz crystal tuning fork tines. A first electrode is disposed on at least one of the stepped portions of each of the grooves and a second electrode is disposed on each of side surfaces of each of the quartz crystal tuning fork tines. A frequency of oscillation of the quartz crystal tuning fork resonator is adjusted at least twice and in different steps. The quartz crystal tuning fork resonator is then mounted in a case and an open end of the case is covered with a lid.
REFERENCES:
patent: 3683213 (1972-08-01), Staudte
patent: 4099078 (1978-07-01), Shibata et al.
patent: 4437773 (1984-03-01), Dinger et al.
patent: 5334900 (1994-08-01), Kawashima
patent: 5929723 (1999-07-01), Kimura et al.
patent: 56065517 (1981-06-01), None
patent: 00044092 (2000-07-01), None
patent: 00223992 (2000-08-01), None
Adams & Wilks
Nguyen Tai
Piedek Technical Laboratory
Tugbang A. Dexter
LandOfFree
Method for manufacturing a quartz crystal unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for manufacturing a quartz crystal unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing a quartz crystal unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3438095