Patent ID: 8927995
Filing Date: 2015-01-06
Classification: H01L

Abstract:
1. A thin film transistor with anti-diffusion portion comprising: a substrate; a semiconductor pattern including a source region, a drain region, a channel region and an anti-diffusion portion formed on the substrate; a first insulating layer on the semiconductor pattern; a gate electrode on the first insulating layer; a second insulating layer on the gate electrode; an interlayer insulating layer pattern formed on the second insulating layer pattern; a source electrode and a drain electrode on the second insulating layer and electrically connected to the source region and the drain region through contact holes of the first and second insulating layer; wherein the anti-diffusion portion protrudes from the source region, the drain region, or both and comprises a plurality of thin extensions, wherein a portion of metal ions from the source electrode and the drain electrode to the channel portion of the semiconductor pattern portion is diffused to the anti-diffusion portion, wherein the anti-diffusion portion reduces a diffusion of metal ions provided to the channel portion of the semiconductor pattern portion by conducting the diffusion of at least a portion of the metal ions from the source electrode and the drain electrode away from the channel portion.