Patent ID: 8093634

Claim:
A method, comprising: forming a first crystalline semiconductor material in a first recess located in an active region of a transistor laterally adjacent to a gate electrode structure by performing a first epitaxial growth process, said first crystalline semiconductor material comprising a dopant species of a first conductivity type and a dopant species of a second conductivity type that is opposite to said first conductivity type; forming a second recess laterally offset from said gate electrode structure, said second recess extending through said first crystalline semiconductor material; forming a second crystalline semiconductor material in said second recess adjacent to said first crystalline semiconductor material by performing a second epitaxial growth process, said second crystalline semiconductor material comprising dopant species of said first and second conductivity types; forming a third recess laterally offset from said gate electrode structure, said third recess extending through a portion of said second crystalline semiconductor material; and forming a third crystalline semiconductor material in said third recess adjacent to said second crystalline semiconductor material by a performing third epitaxial growth process, wherein said third crystalline semiconductor material comprises dopant species of said first and second conductivity types.