Patent ID: 9685534
Date: 2017-06-20
CPC Classifications: H01L

Claim:
1. A method of forming a semiconductor device, the method comprising: providing a substrate; depositing a flowable dielectric material layer over the substrate; performing a wet annealing process to the flowable dielectric material layer; and after the performing of the wet annealing process, performing a dry annealing process to the flowable dielectric material layer, wherein: the wet annealing process includes a first portion of wet annealing followed by a second portion of wet annealing, the second portion of wet annealing is performed at a temperature above 850 degrees Celsius and the first portion of wet annealing is performed at a temperature lower than that of the second portion and is performed for longer duration than the second portion; and the dry annealing process is performed at a temperature at least 500 degrees Celsius and includes a third portion of dry annealing followed by a fourth portion dry annealing, the fourth portion of dry annealing is performed at a temperature above 850 degrees Celsius, and the third portion of dry annealing is performed at a temperature lower than that of the fourth portion and is performed for longer duration than the fourth portion.