Patent ID: 7073387
Filing Date: 2006-07-11
Classification: A61B,A61N,G01L

Abstract:
1. A pressure sensor structure comprising: a substrate formed with a passage oriented orthogonally to said neutral plane; a compliant member mounted on said substrate in a manner such that said compliant member spans said passage and has first and second opposing exposed surfaces, wherein said compliant member is positioned at least proximal to said structure's neutral plane; and first and second strain transducers are associated with said compliant member so that their outputs respond oppositely to deflection of said compliant member resulting from differential pressure across said compliant member but respond similarly to deformation of the substrate; wherein said first and second strain transducers are piezoresistors fabricated from a stable gauge material; and wherein said structure has a sensitivity sufficient to measure pressure changes of about ±1 mmHg.