Applied Materials, Inc.

Zhimin Qi

Aixi Zhang

Yu Lei

Yi Xu

Rongjun Wang

Wei Lei

Xingyao Gao

Dien-Yeh Wu

Shirish A Pethe

Geraldine M Vasquez

Shiyu Yue

Xianyuan Zhao

Mark Joseph Saly

Xianmin Tang

Feng Quan Liu

Bhaskar Jyoti Bhuyan

Yixiong Yang

Sahil Patel

Xiangjin Xie

Tao Huang

Liqi Wu

Xiaodong Wang

Kevin Kashefi

Tsung-Han Yang

Jiang Lu

David Michael Thompson

Jie Zhang

Jiajie Cen

Da He

Wei Dou

Ju Hyun Oh

Patrick Po-Chun Li

James Hugh Connolly

Xiang Chang

Embodiments of the disclosure are directed to methods of removing metal oxide from a substrate surface by exposing the substrate surface to a hydrogen (H) plasma and pulses of RF. In some embodiments, the substrate surface has at least one feature thereon, the at least one feature defining a trench having a top surface, a bottom surface, and two opposed sidewalls. The hydrogen (H) plasma and pulses of RF remove substantially all of the metal oxide, e.g., tungsten oxide (WOx), molybdenum oxide (MoOx), or ruthenium oxide (RuOx), from the substrate surface, without damaging the dielectric and/or critical dimension (CD)/profile of the structure. A metal fill can then be selectively deposited in the trench.

Selective metal selectivity improvement with RF pulsing

Embodiments of methods and associated apparatus for filling a feature in a substrate are provided herein. In some embodiments, a method of depositing tungsten in features of a substrate includes: depositing a seed layer consisting essentially of tungsten in the features via a physical vapor deposition (PVD) process; and depositing a bulk layer consisting essentially of tungsten in the features via a chemical vapor deposition (CVD) process to fill the features such that the deposition of the bulk layer is selective to within the features as compared to a field region of the substrate, wherein the CVD process is performed by flowing hydrogen gas (H) at a first flow rate and a tungsten precursor at a second flow rate, and wherein the first flow rate is less than the second flow rate.

Self field-suppression CVD tungsten (W) fill on PVD W liner

A method of pre-cleaning in a semiconductor structure includes performing a plasma pre-treatment process to remove impurities from a surface of a semiconductor structure comprising a metal layer and a dielectric layer, performing a selective etch process to remove molybdenum oxide from a surface of the metal layer, the selective etch process comprising soaking the semiconductor structure in a precursor including molybdenum chloride (MoCl, MoCl) at a temperature of between 250° C. and 350° C., and performing a post-treatment process to remove chlorine residues and by-products of the selective etch process on the surface of the semiconductor structure.

Metal oxide preclean for bottom-up gapfill in MEOL and BEOL

Methods for reducing resistivity of metal gapfill include depositing a conformal layer in an opening of a feature and on a field of a substrate with a first thickness of the conformal layer of approximately 10 microns or less, depositing a non-conformal metal layer directly on the conformal layer at a bottom of the opening and directly on the field using an anisotropic deposition process. A second thickness of the non-conformal metal layer on the field and on the bottom of the feature is approximately 30 microns or greater. And depositing a metal gapfill material in the opening of the feature and on the field where the metal gapfill material completely fills the opening without any voids.

Methods for forming metal gapfill with low resistivity

Embodiments of the disclosure relate to methods for selectively removing metal material from the top surface and sidewalls of a feature. The metal material which is covered by a flowable polymer material remains unaffected. In some embodiments, the metal material is formed by physical vapor deposition resulting in a relatively thin sidewall thickness. Any metal material remaining on the sidewall after removal of the metal material from the top surface may be etched by an additional etch process. The resulting metal layer at the bottom of the feature facilitates selective metal gapfill of the feature.

Selective metal removal with flowable polymer

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Fremont, CA, United States of America

Zhimin Qi