Patent ID: 8559086
Filing Date: 2013-10-15
Classification: G01L,G02B,G09G

Abstract:
1. A piezoresistive stress sensor, comprising: a plurality of piezoresistive elements coupled together at a plurality of nodes in a bridge circuit; wherein the bridge circuit is disposed on, near, or contiguous to a flexure to detect torsional flexing about an axis of the flexure, the bridge circuit having at least two nodes disposed along the axis of the flexure and at least two nodes disposed off the axis of the flexure to maximize, or nearly maximize, an output of the bridge circuit in response to the torsional flexing of the flexure; and a plurality of contact pads coupled to the plurality of nodes to electrically contact with the bridge circuit, the plurality of contact pads being sufficiently oversized with respect to a width dimension of the plurality of piezoresistive elements to accommodate misalignment of the contact pads with the plurality of nodes.