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US 2022/0199892 A1Published application
Piezoelectric vibrator and manufacturing method therefor
AssigneeMurata Manufacturing Co., Ltd.
InventorsShigeo OJIMA, Masaki USHIRO
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Abstract
A piezoelectric vibrator having a piezoelectric vibration element that includes a piezoelectric piece and a pair of electrodes that face each other with the piezoelectric piece interposed therebetween; a holder that accommodates the piezoelectric vibration element; a resin layer covering at least one electrode of the pair of electrodes; and a water-repellent layer, which has a lower moisture permeability than the resin layer, between the electrode and the resin layer.
Claims20
A piezoelectric vibrator comprising:
- a piezoelectric vibration element that includes a piezoelectric piece and a pair of electrodes that face each other with the piezoelectric piece interposed therebetween;
- a holder that accommodates the piezoelectric vibration element;
- a resin layer covering at least one electrode of the pair of electrodes;
- and
- a water-repellent layer, which has a lower moisture permeability than the resin layer, between the electrode and the resin layer.
2 more elements
A method of manufacturing a piezoelectric vibrator, the method comprising:
- preparing a piezoelectric piece;
- providing a pair of electrodes that face each other with the piezoelectric piece interposed therebetween to form a piezoelectric vibration element;
- mounting the piezoelectric vibration element on a base member using an electrically conductive holding member;
- adjusting a frequency of the piezoelectric vibration element by removing part of a first electrode of the pair of electrodes that is on a side of the piezoelectric vibration element opposite to a side facing the base member;
- annealing the pair of electrodes so as to cause part of the electrically conductive holding member to disperse and deposit on surfaces of the pair of electrodes to form a water-repellant layer;
- and
- bonding a cover member to the base member using a bonding member so as to cause part of the bonding member to disperse and deposit on the water-repellent layer to form a resin layer.
4 more elements
Dependencies are inferred from the claim text.