Patent ID: 8800377
Filing Date: 2014-08-12
Classification: A61B,G01L,Y10T

Abstract:
1. A contact force sensor package comprising: a substrate layer formed of silicon and having a vibration detection unit that includes a shape deformation element which changes shape by a contact force and a pair of first junction pads that are electrical connection ports which are provided on an upper surface of the substrate layer; a flexible circuit substrate layer formed of an elastic material and having a pair of second junction pads provided at a position corresponding to the first junction pads and electrically connected to the first junction pads, via a pair of metal bumps; a vibration transfer unit having one side contacting the shape deformation element of the vibration detection unit and the other side contacting a human body to detect a sphygmus wave and transferring the sphygmus wave to the vibration detection unit; and an adhesion layer formed between the substrate layer and the flexible circuit substrate layer to reinforce a junction force between the substrate layer and the flexible circuit substrate layer, the adhesion layer being not formed in an area overlapping at least the vibration transfer unit, and wherein the elastic material of the flexible circuit substrate layer has an elastic coefficient which is less than an elastic coefficient of the shape deformation element.