Patent ID: 9698175
Date: 2017-07-04
CPC Classifications: G02F,H01L

Claim:
1. A manufacturing method for a thin film transistor, comprising step of: providing a substrate; forming a first metal layer on the substrate, wherein the first metal layer includes an aluminum metal layer, an aluminum oxide layer and a molybdenum metal layer stacked sequentially, wherein, the aluminum metal layer is formed on and above the substrate, the aluminum oxide layer is formed on and above the aluminum metal layer, and the molybdenum metal layer is formed on and above aluminum oxide layer; patterning the first metal layer in order to form a gate electrode of a thin film transistor; sequentially forming a gate insulation layer, a semiconductor layer and an ohmic contact layer on the gate electrode; forming a second metal layer on the ohmic contact layer; and patterning the second metal layer in order to form a source electrode and a drain electrode of the thin film transistor; wherein, the step of forming a first metal layer on the substrate comprises step of: utilizing a plasma to bombard an aluminum target for sputtering aluminum onto the substrate; injecting oxygen when the step of sputtering aluminum onto the substrate is almost completed such that when the aluminum is sputtering onto the substrate, simultaneously, the aluminum perform an oxidation reaction with the oxygen in order to form the aluminum oxide layer; and forming the molybdenum metal layer on the aluminum oxide layer.