Patent ID: 8975124
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A preparation method for a thin film transistor comprising: preparing a gate electrode and a gate insulating layer on a base substrate, preparing an active layer on the gate insulating layer, and preparing an ohmic contact layer, a source electrode, a drain electrode and a passivation layer on the active layer, wherein the active layer comprises an active layer lower portion that contacts the gate insulating layer and an active layer upper portion that is in direct contact with the ohmic contact layer, and preparing of the active layer on the gate insulating layer comprises: using a layer-by-layer growing process to prepare at least two layers of amorphous silicon thin film which are each treated by hydrogen plasma layer by layer to obtain microcrystalline silicon so as to form the active layer lower portion, and using a successive deposition process to prepare microcrystalline silicon so as to form the active layer upper portion.