Patent ID: 8759182
Filing Date: 2014-06-24
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device comprising: forming a first insulating layer on a substrate; forming a second insulating layer by performing a first nitridation on the first insulating layer; forming a third insulating layer by sequentially performing a first anneal and a second anneal on the second insulating layer, the first anneal performed at a first temperature with a stream of a first gas, and the second anneal performed at a second temperature higher than the first temperature with a stream of a second gas different from the first gas; forming a fourth insulating layer by performing a second nitridation on the third insulating layer; and forming a fifth insulating layer by sequentially performing a third anneal and a fourth anneal on the fourth insulating layer, wherein the third anneal is performed at a third temperature higher than the first temperature with a stream of a third gas, and the fourth anneal is performed at a fourth temperature higher than the second temperature with a stream of a fourth gas different from the third gas.