Patent ID: 6037195
Filing Date: 2000-03-14
Classification: H01L,Y10S

Abstract:
A method of producing a thin film transistor, comprising the steps of:forming an insulation film and an electrically conductive film on a semiconductor layer;forming a resist mask of a first pattern on said conductive film;patterning said conductive film into said first pattern;forming a resist mask of a second pattern, by removing an outer peripheral portion of the resist mask of said first pattern;performing first implantation of impurities into said semiconductor layer, with the conductive film of said first pattern as a mask;patterning the conductive film into said second pattern, with the resist mask of said second pattern as a mask;removing the resist mask of said second pattern; andperforming second implantation of impurities into said semiconductor layer, with the conductive film of said second pattern as a mask, after removing the resist mask of said second pattern.