Patent ID: 7736985
Filing Date: 2010-06-15
Classification: G01S,H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: (a) a step of preparing a semiconductor substrate having a first main surface and a second main surface positioned on opposite sides in a thickness direction; (b) a step of forming a plurality of sensor cells in each of a plurality of chip areas on the first main surface of the semiconductor substrate; (c) a step of depositing a negative-type photosensitive insulating film on the first main surface of the semiconductor substrate so as to cover the plurality of sensor cells; (d) a step of performing an exposure process to the negative-type photosensitive insulating film in each of the plurality of chip areas, thereby transferring a desired pattern onto the negative-type photosensitive insulating film; and (e) a step of performing a development process to the negative-type photosensitive insulating film, thereby forming the desired pattern on the negative-type photosensitive insulating film, wherein each of the plurality of sensor cells includes: a first electrode formed on the first main surface of the semiconductor substrate; a second electrode provided so as to be opposed to the first electrode; and a cavity portion provided between the first electrode and the second electrode, wherein the step (d) includes a step of dividing one chip area into a plurality of exposure areas in each of the chip areas and performing the exposure of the divided exposure areas, wherein, in the step of exposing the plurality of exposure areas, the exposure process is performed so that a stitching exposure area where parts of adjacent exposure areas are superposed is formed in joint portions of the adjacent exposure areas of the plurality of exposure areas, whereby a protrusion is formed on an upper surface of the negative-type photosensitive insulating film, said protrusion being part of the negative-type photosensitive insulating film, and wherein the stitching exposure area is formed so that its center in a short-side direction is positioned at a center of a line which connects centers of the sensor cells adjacent with interposing the stitching exposure area therebetween.