Patent ID: 6573153
Filing Date: 2003-06-03
Classification: H01L,Y10S

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:(a) preparing a substrate having a main surface including a boundary between a first region and a second region; (b) selectively forming, in said main surface of said substrate, a concave portion in a portion including said boundary; (c) forming a negative photoresist on a structure obtained at said step (b); (d) exposing said photoresist by using a photomask through which a phase of a light emitted above said first region and a phase of a light emitted above said second region are reverse to each other; (e) developing said photoresist after said step (d); (f) removing said substrate in a portion exposed at said step (e), thereby forming a trench; and (g) filling said concave portion and said through trench with an insulating film.