Patent ID: 8283709

Claim:
A semiconductor structure comprising: I. a silicide substrate having two doping areas; II. a nitride layer disposed on the silicide substrate, (a) the nitride layer and the silicide substrate having a recess structure formed thereon, the doping areas of the silicide substrate are respectively arranged on the opposite sides of the recess structure, (b) the silicide substrate defines an etched space therein communicative with the lower end of the recess structure, the etched space having a cross section greater than that of the recess structure, (c) a protruding structure exposingly formed in the etched space on the silicide substrate; III. a pair of trench isolation areas disposed on the opposite sides of the silicide substrate and the recess (along the long symmetrical axis), wherein each trench isolation areas having a overlaying structure comprising an OX liner, a strain SiN liner, a SOD, and a HDP disposed from bottom to top in the above order; and IV. a strained nitride coating disposed on the side wall that defines the recess structure covering the doping areas of the silicide substrate.