Patent ID: 6591689
Filing Date: 2003-07-15
Classification: G01L,H01L

Abstract:
A sensor comprising:a base having leads extending from a surface thereof; a sensor chip having a sensing portion to generate an electric signal according to an amount of physical quantity applied thereto, and having conductive bumps formed on a surface thereof; and a stress relief member interposed between one of the bumps and one of the leads, for preventing transmission of stress caused by a difference in a linear expansion coefficient between the base and the sensor chip from the base to the sensor chip; wherein the surface of the sensor chip faces the surface of the base with the bumps interposed therebetween, and the sensor chip is electrically connected to the leads through the bumps, the stress relief member is composed of a lead frame, the lead frame comprising: one end connected to the one of the bumps; another end connected to the one of the leads; and a mid portion capable of elastically deforming, disposed between the one end and the another end.