Patent ID: 7538009
Filing Date: 2009-05-26
Classification: C23C,H01L

Abstract:
1. A method for fabricating an STI gap fill oxide layer for a semiconductor device, comprising: forming a shallow trench for forming an STI on a semiconductor substrate; forming an STI liner oxide layer in the shallow trench for the STI; depositing an APCVD oxide layer on the STI liner oxide layer for an oxide layer gap fill in the shallow trench of the STI; performing a densifying annealing process to densify the APCVD oxide layer; and depositing an HDP-CVD oxide layer on the APCVD oxide layer so that the STI shallow trench is completely gap-filled, wherein depositing the APCVD oxide layer comprises: wherein the plurality of APCVD oxide layer deposition injectors includes first, second, third, and fourth injectors, which are installed along a moving path of the semiconductor loaded on the belt, wherein the first and second injectors perform an APCVD oxide layer deposition at a temperature higher than that of the third and fourth injectors to perform a surface reaction between first and second laminate APCVD oxide layers to the STI liner oxide layer.