Patent ID: 8268680

Claim:
A method of fabricating a transistor of a semiconductor device, the method comprising: forming a gate electrode in an NMOS region and a PMOS region of a semiconductor substrate; forming gate spacers over sidewalls of the gate electrodes; implanting first dopants in the NMOS region to form a first junction region in the NMOS region; depositing an oxide film over the gate electrode, the gate spacers, and the NMOS and PMOS regions of the semiconductor substrate; removing hydrogen (H) atoms from the oxide film and the gate spacers disposed over the gate electrode in the NMOS region and the gate electrode in the PMOS region to reduce a level of hydrogen in the oxide film and a level of hydrogen in the gate spacers; after the step of removing hydrogen atoms, removing a portion of the oxide film provided over the PMOS region, wherein the oxide film remains over the NMOS region; and implanting second dopants in the PMOS region to form a second junction region in the PMOS region, wherein the first dopants and the second dopants have different conductivity.