Daishinku Corporation

Daishinku Corproation

Tomo Fujii

Syunsuke Satoh

Satoru Ishino

Yoshinari Morimoto

Yoshinobu Sakamoto

Hiroaki Yamashita

Tadataka Koga

Takashi Shirai

Kozo Shibutani

Kazuki Otani

Minoru Iizuka

Tatsuya Murakami

Hiroyuki Ishihara

Masato Itoh

A tuning fork-type vibration piece is provided, in which a cushioning portion is formed on the base of a package and allowed to contact parts for contact of arm portions which are any parts but their edges, and the parts for contact of the arm portions that contact the cushioning portion are electrodeless regions, which prevents the risk of frequency fluctuations caused by any electrode being chipped off by contact with the cushioning portion.

Tuning fork-type vibrator and manufacturing method for the same

A tuning fork-type vibration piece is provided, in which a cushioning portion is formed on the base of a package to make contact with abutting portions of arm portions which are any parts but their edges, and the abutting portions of the arm portions allowed to contact the cushioning portion are electrodeless regions including no electrode, which prevents the risk of frequency fluctuations that may occur in case an electrode is chipped off by possible contact with the cushioning portion.

Tuning fork-type vibrator

This piezoelectric wafer has: a piezoelectric vibration piece; a frame portion that supports the piezoelectric vibration piece; and a coupling portion that couples the piezoelectric vibration piece to the frame portion. A pair of first and second metal bumps is formed in juxtaposition on the piezoelectric vibration piece. The coupling portion has slits extending in its width direction except in a bridge, i.e., a part of the coupling portion in its width direction. An end in the width direction of the bridge is distantly spaced from the first and second metal bumps both in a direction perpendicular to the width direction of the coupling portion with no overlap with these metal bumps.

Piezoelectric wafer, piezoelectric vibration piece, and piezoelectric vibrator

This piezoelectric wafer has: a piezoelectric vibration piece; a frame portion that supports the piezoelectric vibration piece; and a coupling portion that couples the piezoelectric vibration piece to the frame portion. The piezoelectric vibration piece is broken off at the coupling portion and separated from the piezoelectric wafer. On front and back surfaces of the coupling portion, grooved slits extending along a width direction of the coupling portion are formed except for parts of the coupling portion in the width direction. An electrode on at least one of front and back surfaces of the piezoelectric vibration piece is extracted to a frame-portion side of the piezoelectric wafer by way of the part of the coupling portion in the width direction.

A tuning fork type piezoelectric vibration pieceincludes a base portionin which a piezoelectric vibration substrate has a connection area with an external element, and a pair of leg portionsprojecting from a first end face of the base portion. The pair of leg portions has vibrating portionsequipped with drive electrodes, wide weight portionsformed at tip ends of the vibrating portions, and connecting portionsbetween the vibrating portions and the weight portions. The connecting portions have widening sections whose width increases exponentially from the vibrating portions to the weight portions. The length of the widening sections is greater than their width. The weight portions have constant-width parts whose width is fixed from their connecting positions with the connecting portions. The weight portions are free of drive electrodes.

Tuning fork type piezoelectric vibration piece and tuning fork type piezoelectric vibrator

A tuning-fork type piezoelectric resonator plate includes: at least a plurality of leg portions serving as vibrating portions; a bonding portion bonded to the outside, and a base portion from which the leg portions and the bonding portion protrude. The plurality of leg portions protrude from a first end face of the base portion and are provided side-by-side on the first end face. The bonding portion protrude from a second end face located opposite the first end face of the base portion at a position located opposite a center position of the plurality of leg portions in a width direction of the first end face of the base portion. And, at least a base end portion of the bonding portion is used as a bond region that is bonded to the outside.

Tuning-fork type piezoelectric resonator plate comprising leg portions and a bonding portion respectively provided on first and second end faces of a base portion

An electrode forming region for providing lead electrodes () is provided on a crystal resonator plate (). Opposed side surfaces () of a substrate () are formed and inclined in the same direction with respect to a front major surface (). Also, an adhesion reinforcing portion () for reinforcing adhesion to a conductive adhesive () is provided in the electrode forming region for the lead electrodes (). For example, the adhesion reinforcing portion () is a notch portion which is cut and formed in the opposed side surfaces (). Thereby, an adhesion strength of the crystal resonator plate () and the conductive adhesive () is increased.

Piezoelectric resonator plate and piezoelectric resonator device

A tuning fork resonator includes a base portion and leg portions extending from the base portion. A groove portion is formed in a major surface of each leg portion. An in-groove electrode is formed in the groove portion. A side surface electrode is formed on a side surface of the leg portion. The in-groove electrode and the side surface electrode are connected via a base portion electrode formed in the base portion. An outward extending groove electrode extending on a vertical wall facing the base portion and a leg portion tip-side major surface from the in-groove electrode of the groove portion, and a beside-groove electrode for leading the outward extending groove electrode on the leg portion major surface along beside the groove portion to the base portion electrode, are formed.

Growing community of inventors

Kakogawa, Japan

Tomo Fujii