Patent ID: 7100448

Claim:
An accelerometer, comprising: a sensor chip including a weight portion that detects force imparted from outside, a frame portion that surrounds the weight portion, a beam portion that flexibly supports the weight portion by connecting an upper portion of the weight portion to an upper portion of the frame portion so that a bottom surface of the weight portion is placed at a position higher than a the bottom surface of the frame portion by a predetermined amount, and a sensor element having electric resistance that varies depending on an amount by which the beam portion deflects; a mounting substrate on which said sensor chip is mounted by fixing the bottom surface of the frame portion of said sensor chip at a predetermined position using an adhesive portion having a first thickness applied thereto; and a spacer formed from an adhesive applied at a position on a surface of said mounting substrate, which position corresponds to a central position of the weight portion of said sensor chip, by an amount of a second thickness that is larger than said first thickness, with a predetermined gap being formed between the bottom surface of the weight portion and said spacer, said spacer being provided so as to restrict an amount of movement of said weight portion in a downward directions; wherein the adhesive that forms said spacer, and said adhesive portion, are formed from a same adhesive material, with said spacer and said adhesive portion being formed at a same time.