Patent ID: 7645627
Filing Date: 2010-01-12
Classification: B81B,B81C

Abstract:
1. A method for manufacturing a sensor device having a circuit portion and a movable sensing portion, the method comprising the steps of: providing a substrate having an insulation layer on a top surface; providing a silicon layer on top of the insulation layer; forming a first trench extending through the silicon layer and reaching the insulation layer so as to isolate a first portion of the silicon layer from a second portion of the silicon layer; disposing a fill material within the first trench; forming one or more electrical components on the first portion of the silicon layer; forming one or more contacts on the second portion of the silicon layer; forming one or more second trenches in the second portion of the silicon layer so as to provide one or more movable elements within the second portion of the silicon layer, wherein the one or more movable elements serve as sensing elements; and forming one or more anti-stiction bumps to prevent a portion of movable element from sticking to an adjacent feature of the sensor; wherein the step of forming the second trench exposes at least a portion of the anti-stiction bumps.