Patent ID: 11932935
Assignee: ENTEGRIS, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. A process for the vapor deposition of a molybdenum or tungsten-containing film onto the surface of a microelectronic device in a reaction zone, the reaction zone operated at a pressure of about 1 to about 1000 Torr and a temperature of about 300° C. to about 1000° C.; wherein the surface is chosen from nitrides, oxides, metals, semiconductors, and superconductors, which comprises:
a. repeatedly introducing into a reaction zone containing the surface, a molybdenum or tungsten precursor in a pulse for a duration of about 0.1 to about 120 seconds followed by a pause of about 1 to about 120 seconds, wherein a first precursor concentration in the reaction zone is about 1 to about 5000 ppm at its peak, while continuously introducing into the reaction zone a reducing gas, until a film having a thickness of about 3 Å to about 25 Å has been deposited with a smooth surface morphology, and
b. repeatedly introducing into a reaction zone containing the surface, the molybdenum or tungsten precursor in a pulse for a duration of about 0.1 to about 120 seconds, thereby reaching a second precursor concentration, followed by a pause of about 1 to about 120 seconds; wherein the second precursor concentration is about 1.3 to about 100 times the first precursor concentration, while continuously introducing into the reaction zone a reducing gas, until a film having a desired thickness has been deposited.