Patent ID: 7795110
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A method of fabricating a trench isolation type semiconductor device, the method comprising: forming a trench in a field region of a semiconductor substrate using an etching mask, the etching mask including a buffer insulating layer pattern defining a trench region and a hard mask; conformally forming an oxide layer along the inside of the trench; conformally forming a liner layer along the oxide layer; forming a first field insulating layer in the trench including the oxide layer and the liner layer; forming a top protection layer on the first field insulating layer; forming a second field insulating layer on the top protection layer; at least partially removing the hard mask and the top protection layer formed on the hard mask; forming a corner protection layer compensating for portions of each of the top protection layer formed on the first field insulating layer and beneath the second field insulating layer and the liner layer that are damaged in the removing of the hard mask and the top protection layer; and removing excess portions of the corner protection layer and the second field insulating layer to complete a field protection layer.