Patent ID: 8956926
Filing Date: 2015-02-17
Classification: H01L

Abstract:
1. A method for manufacturing a self-aligned thin film transistor, comprising a step of forming a gate electrode, wherein the metal gate electrode is formed on a substrate; a step of forming gate dielectric layer, wherein the gate dielectric layer covering the gate electrode is formed on the substrate; a step of forming and processing an active region, wherein a metal oxide semiconductor layer having a high carrier concentration is formed on the gate dielectric layer and processed to form the active region including a source region, a drain region and a channel region, a layer of photoresist is then coated on the metal oxide semiconductor layer, exposed from a back surface of the substrate by using the gate electrode as a mask and developed so that a photoresist pattern is formed, the photoresist pattern is processed so that the channel region on the metal oxide semiconductor layer is exposed and oxidized by a plasma having oxidbillity at a temperature which is lower than the highest temperature that the substrate can stand; and a step of leading electrodes, wherein electrode leads for the source region, drain region and gate electrode are formed.