Patent ID: 6927088

Claim:
A method for manufacturing an electrooptical substrate device that includes a substrate, an insulator layer, a semiconductor layer formed above said insulator layer and including source region, drain region, and a channel region, a gate electrode formed above said semiconductor layer in said channel region through a gate insulating film, a scanning line connected to said gate electrode, a data line connected to one of said source region and said drain region, a pixel electrode connected to the other of said source region and said drain region, a transistor being architected by said semiconductor layer, said gate insulating film and said gate electrode to switch-control said pixel electrode, an interlayer insulating film formed above said gate electrode, a source electrode formed by conductor layer above said interlayer insulating film and connected to said source region, a drain electrode formed by conductor layer above said interlayer insulating film and connected to said drain region, said data line being connected to one of said source region and said drain region by way of connecting one of said source electrode and said drain electrode, and said pixel electrode being connected to the other of said source region and said drain region by way of connecting the other of said source electrode and said drain electrode, the method comprising: connecting said source electrode to said source region through a contact hole opened in said interlayer insulating film and said gate insulating film, and said drain electrode being connected to said drain region through a contact hole opened in said interlayer insulating film and said gate insulating film; forming said interlayer insulating film above said semiconductor layer via a first depositing step; opening said contact hole in said interlayer insulating film and said gate insulating film; forming a material film of a predetermined kind to be formed into said conductor layer, above said interlayer insulating film where the contact hole is opened via a second depositing step; and implanting ions to said formed material film to thereby form said conductor layer, said ions being implanted with an inclination by a predetermined angle X with respect to a centerline of said contact hole, such that said ions are implanted to a region of said material film formed on a side surface of said contact hole, and said predetermined angle X being set within a range that the ions are implanted at the whole region of said material film formed on a bottom surface of said contact hole by changing the inclination direction of the ions; and in the opening step, said contact hole being opened in a pillar form, said predetermined angle X in the ion implant step being set to satisfy 0<X≦tan −1 {(a−2c)/2e}, where a diameter of said contact hole is “a”, a depth of said contact hole is “e”, and a film thickness of said material film is “c”.