Patent ID: 8097517
Filing Date: 2012-01-17
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device, comprising the steps of: forming first and second gates over PMOS and NMOS areas of a semiconductor substrate, respectively; selectively ion implanting boron ions into a surface of the PMOS area of the semiconductor substrate corresponding to both sides of the first gate; growing first and second epitaxial layers over a portion of the PMOS area of the semiconductor substrate corresponding to both sides of the first gate and a portion of the NMOS area of the semiconductor substrate corresponding to both sides of the second gate, respectively; forming a first junction area in a portion of the PMOS area of the semiconductor substrate corresponding to both sides of the first gate including the first epitaxial layer by ion implantation of P-type impurities; and forming a second junction area, having a depth from a surface of the semiconductor substrate deeper than a depth of the first junction area, in a portion of the NMOS area of the semiconductor substrate corresponding to both sides of the second gate including the second epitaxial layer by ion implantation of N-type impurities, wherein the step of growing first and second epitaxial layers is implemented such a manner that the first epitaxial layer grow at a faster speed than the second epitaxial layer, thus the first epitaxial layer have a higher height than the second epitaxial layer.