Patent ID: 6767808
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A method for forming a p-channel metal-oxide semiconductor(PMOS) device, the method comprises the steps of:forming a channel region below a surface of a semiconductor substrate; activating dopants implanted into the channel region through a first annealing process performed twice by rising temperature velocities different to each other; forming a gate oxidation layer and a gate electrode on the semiconductor substrate subsequently; forming a source/drain regions at both sides of the gate electrode in the semiconductor substrate; and activating dopants implanted into the source/drain regions through a second annealing process performed at the same conditions of the first annealing process, wherein each of the first annealing and the second annealing processes includes a first step for first annealing by a velocity of a first rising temperature to a first process temperature at which a solid phase polycrystalline growth is occurred and a second step for annealing by a velocity of a second rising temperature from the first process temperature to a second process temperature from the first process temperature, respectively, and wherein the velocity of the second rising temperature is relatively larger than that of the first annealing temperature.