Patent ID: 11859277
Assignee: APPLIED MATERIALS, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C

Claim 0:
1. A method of forming a seam-free gap fill, the method consisting of:
depositing a second metal film in a feature on a substrate to partially fill the feature with the second metal film by a process using a zero-valent metal arene precursor and an alkyl halide catalyst, the feature comprising a bottom and at least one sidewall, the bottom comprising a first metal and the at least one sidewall comprising a dielectric, the second metal film forming selectively on the bottom relative to the at least one sidewall and having a top surface below a top surface of the dielectric;
depositing a liner on the sidewall of the feature above the second metal film and the top surface of the dielectric, substantially no liner deposited on the top surface of the second metal film within the feature;
filling the feature with the second metal film to cover the liner and the top surface of the dielectric; and
removing the second metal film, the liner from the top surface of the dielectric and at least some of the dielectric, leaving some of the liner within the feature, to form a seam-free gap fill, wherein the first metal comprises one or more of cobalt, tungsten, ruthenium or molybdenum and the second metal film comprises one or more of tungsten, ruthenium or molybdenum.