Patent ID: 6624088
Filing Date: 2003-09-23
Classification: C23C,H01L

Abstract:
A method of depositing a silicon oxynitride spacer film on a gate stack in a semiconductor device, comprising:contacting said gate stack with a gaseous mixture comprising bistertiarybutylaminosilane (BTBAS), at least one nitrogen-containing compound, and oxygen (O2) to form said deposited silicon oxynitride spacer film, said silicon oxynitride spacer film comprising 37.5% to about 42.5% silicon by weight, 22% to about 28% nitrogen by weight, 15% to 20% oxygen by weight and 5% to about 25% carbon by weight; and controlling the contact conditions to provide a wet etch rate for said deposited spacer film that is within the range of about 25 Angstroms/minute to less than or equal to about 1 Angstrom/minute.