Patent ID: 11967564
Assignee: DENSO CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for manufacturing a semiconductor device, comprising:
forming an insulating film on a surface of a semiconductor layer of a semiconductor substrate, including a region corresponding to an alignment key formed on the surface of the semiconductor layer, the alignment key having a stripe pattern including a plurality of lines;
forming a contact hole in the insulating film;
removing a part of the insulating film including the region corresponding to the alignment key including the plurality of lines and a periphery of the region so as to expose the semiconductor layer;
forming a conductor material on the insulating film and directly on the semiconductor layer exposed by the removing the part of the insulating film, the conductor material being in contact with the semiconductor layer through the contact hole and where the part was removed; and
patterning the conductor material using the alignment key inherited to a surface of the conductor material as a reference, wherein
the plurality of lines of the alignment key is provided by a plurality of recessed portions formed in the surface of the semiconductor layer, and
the periphery of the region is defined along the surface of the semiconductor layer of the semiconductor substrate outside of and around the recessed portions.