Patent ID: 9608089
Date: 2017-03-28
CPC Classifications: H01L

Claim:
1. A method of manufacturing a thin-film transistor substrate, the method comprising: forming a semiconductor pattern layer on a substrate; forming a first insulating film on the semiconductor pattern layer; forming, on the first insulating film, a metal pattern layer comprising a gate electrode and first and second alignment electrodes respectively spaced apart from two sides of the gate electrode; forming a cover layer covering the gate electrode, and removing the first and second alignment electrodes, wherein the cover layer is formed by forming a photoresist layer on the metal pattern layer, and then exposing and developing the photoresist layer by using a first mask having a first pattern, wherein a width of the first pattern is larger than a width of the cover layer; performing a first doping process by doping the semiconductor pattern layer with a first impurity by using the cover layer as a mask; removing the cover layer; and performing a second doping process by doping the semiconductor pattern layer with a second impurity having a lower impurity concentration than the first impurity by using the gate electrode as a mask.