Patent ID: 7673519
Filing Date: 2010-03-09
Classification: G01L,Y10T

Abstract:
1. A pressure sensor, comprising: a first set of electrodes overlying an insulative surface; a second set of electrodes overlying the insulative surface, the second set of electrodes being configured in an interleaved arrangement with the first set of electrodes, wherein a geometry of individual electrodes of the first set of electrodes substantially matches a geometry of individual electrodes of the second set of electrodes; and a common electrode (i) overlying, (ii) spaced from, and (iii) configured in connection with the first and second sets of electrodes to form a common pressure cavity, wherein the common electrode includes first portions corresponding to sense membrane portions and second portions corresponding to reference membrane portions, further wherein an area of a sense membrane portion is greater than an area of a reference membrane portion.