Patent ID: 6844744
Filing Date: 2005-01-18
Classification: A61B,G06K

Abstract:
1. A surface shape recognition sensor comprising: a plurality of sensor electrodes arranged in the same plane on a substrate as to be insulated/isolated from each other; an insulating protective film which is made of an insulator and formed to over said sensor electrodes; capacitance detection means for detecting a capacitance formed by said sensor electrode; a surface protective film which has a hydrophobic property and is formed on said insulating protective film; a ground electrode which is formed on the substrate such that said ground electrode is partly exposed on surfaces of said insulating protective film and said surface protective film so as to be insulated/isolated from said sensor electrode and come into contact with a surface of a detection target; a detection surface which is formed from said plurality of sensor electrode and covered with said insulating protective film and said surface protective film; and an external connection terminal formed from a bump structure which is formed on a portion of the substrate which is located around the detection surface and protrudes from an upper surface of said surface protective film, wherein said capacitance detection means is configured to detect a capacitance between said ground electrode and each of said sensor electrodes.