Patent ID: 11862473
Assignee: LAM RESEARCH CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC H

Claim 0:
1. A method comprising:
providing to a chamber a high aspect ratio (HAR) structure having a stimulus responsive polymer (SRP) in a high aspect ratio gap formed between features of the HAR structure, the high aspect ratio gap having an aspect ratio of at least 8 and a total thickness Ttotal; and
performing one or more cycles of removing the SRP from the gap comprising, each cycle comprising:
(a) pulsing a first reactant to the chamber such that the first reactant diffuses into the gap only to a depth less than Ttotal,
(b) after (a), purging the chamber,
(c) after (b), pulsing a second reactant to the chamber such that the second reactant diffuses into the gap only to a depth less than Ttotal;
(d) reacting the first reactant and the second reactant to form a compound that degrades the SRP;
(e) degrading a thickness of SRP that is less than Ttotal; and
(f) removing the degraded SRP.