Patent ID: 7843523
Filing Date: 2010-11-30
Classification: H01L

Abstract:
1. A thin film transistor comprising: a source area and a drain area provided on a semiconductor thin film crystallized on a glass base plate; a gate insulating film provided between said source area and drain area on said semiconductor thin film; a gate electrode provided on said gate insulating film; a second insulating film provided on said gate electrode, said source area, and said drain area; and contact holes provided on said second insulating film and having a conductor layer for electrically contacting at least one of said gate electrode, said source area, and said drain area, wherein a planar shape of the contact holes is in a plane parallel to a major surface of the second insulating film, wherein the planar shape of said contact holes is generally rectangular with long and short sides, and wherein a length dimension of the long sides of the contact holes of planar shape is as long as or longer than 1.4 times a length dimension of the short sides.