Patent ID: 7045379

Claim:
A method of manufacturing a surface shape recognition sensor, comprising the steps of: forming first and second interconnections on a semiconductor substrate; forming an interlayer dielectric film on the semiconductor substrate to cover the first and second interconnections; forming a first metal film of one material selected from the group consisting of TiW, Ti, TiN, Cr, and a composite film thereof, on the interlayer dielectric film and electrically connected to the first and second interconnections through first and second through holes formed in the interlayer dielectric film; forming a first mask pattern on the first metal film to cover predetermined first and second regions corresponding to openings of the first and second through holes, respectively; selectively removing the first metal film exposed to a bottom of the opening of the first mask pattern to form a sensor electrode and connection electrode film, formed of the first metal film connected to the first and second interconnections, in the first and second regions, respectively; forming a passivation film made of an insulating material on the interlayer dielectric film, the sensor electrode and the connection electrode film; forming a third through hole in the passivation film to reach the connection electrode film; forming a second metal film on the passivation film to be in contact with the connection electrode film exposed to a bottom of the third through hole; forming, on the second metal film, a second mask pattern having a pattern portion on a predetermined region including the third through hole excluding a region corresponding to the sensor electrode; and selectively removing the second metal film using the second mask pattern as a mask to form a ground electrode to be connected to the second interconnection through the connection electrode film.