Patent ID: 9142574
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A method for manufacturing an active matrix display device, comprising: forming a semiconductor layer over a glass substrate; forming a first insulating film over the semiconductor layer; forming a conductive layer on and in contact with the first insulating film; forming a mask over the conductive layer, the mask having a first width; etching the conductive layer by using the mask so as to form a wiring; adding an element selected from an n-type impurity element and a p-type impurity element into a first portion of the semiconductor layer at a first concentration rate, wherein the first portion is not covered with the wiring; etching both the wiring and the mask so that the mask has a second width, the second width being smaller than the first width; and adding the element into the first portion and a second portion of the semiconductor layer at a second concentration rate smaller than the first concentration rate.