Patent ID: 7507611
Filing Date: 2009-03-24
Classification: H01L

Abstract:
1. A method for manufacturing a thin film transistor comprising the steps of: forming a gate oxide film on a substrate; forming a first nitride layer on the gate oxide film; forming a polysilicon layer on the first nitride layer; forming a second nitride layer on sidewalls of the gate oxide film, the first nitride layer, and the polysilicon layer; forming an oxide layer on the sidewall of the second nitride layer; forming a first buffer layer on a sidewall of the oxide layer; forming a third nitride layer on a sidewall of the first buffer layer; forming a second buffer layer on a sidewall of the third nitride layer; implanting impurity ions to form a pocket below the second nitride layer; and nitridizing an edge portion of the gate oxide film to form a bottom portion of the second nitride layer that is below the first nitride layer.