Crystal unit and method of adjusting crystal unit
AssigneeFujitsu Limited
InventorsHajime Kubota, Masayuki ITOH, Masakazu Kishi
Life of this patent
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Abstract
A crystal unit includes: a capacitor body in which a plurality of light-transmitting dielectrics and a plurality of internal electrodes are alternately stacked; a crystal piece arranged above the capacitor body and having excitation electrodes on both surfaces thereof; an external electrode formed on a surface of the capacitor body; and a first conductor portion formed in an inner layer of the capacitor body, and including one end electrically coupled to a first internal electrode among the plurality of internal electrodes, and the other end electrically coupled to the external electrode.
Claims15
A crystal unit comprising:
- a capacitor body in which a plurality of light-transmitting dielectrics and a plurality of internal electrodes are alternately stacked;
- a crystal piece arranged above the capacitor body and having excitation electrodes on both surfaces thereof;
- an external electrode formed on a surface of the capacitor body;
- and
- a first conductor portion formed in an inner layer of the capacitor body, and including one end electrically coupled to a first internal electrode among the plurality of internal electrodes, and the other end electrically coupled to the external electrode.
A crystal unit comprising:
- a capacitor body in which a plurality of light-transmitting dielectrics and a plurality of internal electrodes are alternately stacked;
- a crystal piece arranged above the capacitor body and having excitation electrodes on both surfaces thereof;
- an external electrode formed on a surface of the capacitor body;
- a first conductor portion formed in an inner layer of the capacitor body, and including one end electrically coupled to a first internal electrode among the plurality of internal electrodes, the other end electrically coupled to the external electrode, and a disconnecting portion formed between the one end and the other end;
- and
- a coated conductor portion formed in the disconnecting portion and including a conductor coated with an insulating material.
A method of adjusting a crystal unit including a crystal piece, a capacitor body having a stacked structure of a light-transmitting dielectric and a plurality of internal electrodes, an external electrode formed on a surface of the capacitor body, an excitation electrode formed on the crystal piece and electrically coupled to ground through the capacitor body, and a first conductor portion formed in an inner layer of the capacitor body, and including one end electrically coupled to a first internal electrode among the plurality of internal electrodes, and the other end electrically coupled to the external electrode, the method comprising:
- irradiating a laser light to the first conductor portion to physically cut the first conductor portion after the crystal unit is mounted.
Dependencies are inferred from the claim text.