Patent ID: 7393765

Claim:
A method of forming coatings on a workpiece having complementary metal oxide semiconductor (CMOS) devices consisting of a set of N-channel devices and a set of P-channel devices, said method comprising: successively masking with photoresist each one of the sets of N-channel and P-channel devices while unmasking or leaving unmasked the other set, and after each step of successively masking one of the sets of devices, carrying out the following deposition steps: placing the workpiece in a reactor chamber facing a processing region of the chamber; introducing a process gas containing any of a semiconductor element, nitrogen, hydrogen or oxygen into the reactor chamber; generating a torroidal RF plasma current in a reentrant path through the processing region by applying RF plasma source power at a first frequency to a region of a reentrant conduit external of the chamber and forming a portion of the reentrant path; applying an RF plasma bias voltage at a second frequency to the workpiece; maintaining the temperature of the workpiece below a threshold photoresist removal temperature; setting said RF plasma source power at a level at which the coating is deposited non-conformally; and setting said RF bias voltage at a level at which the coating is deposited with a first stress when the unmasked set consists of the P-channel devices and with a second stress when the unmasked set consists of N-channel devices.