Patent ID: 11972952
Assignee: LAM RESEARCH CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A method comprising:
(a) depositing a tungsten nucleation layer in a feature on a substrate by alternating pulses of a tungsten precursor and a boron-containing reducing agent;
(b) depositing a tungsten template layer on the tungsten nucleation layer by alternating pulses of a tungsten precursor and hydrogen (H2) at a substrate temperature between 250° C. and 350° C.;
(c) after (b), raising the substrate temperature by at least 50° C.; and
(d) after (c), depositing a tungsten bulk layer by alternating pulses of a tungsten precursor and hydrogen (H2) at a substrate temperature of at least 350° C.