Patent ID: 6277680
Filing Date: 2001-08-21
Classification: H01L

Abstract:
A semiconductor processing method of forming a thin film transistor comprising:forming a depletion region within a semiconductive layer, the depletion region having a different thickness in one portion of the semiconductive layer relative to another portion of the semiconductive layer;while the depletion region is formed, exposing the semiconductive layer to an electrolytic etching composition to etch the semiconductive layer to about the depletion region, the etched semiconductive layer comprising a different thickness within the one portion relative to the other portion, one of the etched portions being a channel region location for a thin film transistor and the other being a location for a source/drain region of the thin film transistor;forming a transistor gate proximate the channel region location; andincorporating the transistor gate, transistor source/drain region location and transistor channel region location into a thin film transistor.