Patent ID: 7877848

Claim:
A method for fabricating an angular velocity sensor having a tuning-fork vibrator that has a base and arms extending from the base comprising: cutting a substrate made of one of LiNbO 3 and LiTaO 3 into a piece; forming grooves extending from external side surfaces of opposite sides of the piece to inside of the piece alternately, the grooves having a length equal to or greater than half of a distance connecting the external side surfaces of the opposite sides and forming a side surface of a part that forms the base and a part that forms the arms except for an end part of the arms, and dividing the piece into parts by dividing grooves that are formed in the piece located between an end of the grooves extending from either one of the external side surfaces of the opposite sides and an external side surface located in front of the end of the grooves, the dividing grooves being narrower than the grooves.