Kazuhiko Tonari

Title: Kazuhiko Tonari: Semiconductor Process and Deposition Inventions.

Introduction

Kazuhiko Tonari is an inventor associated with Susono, Japan. His work includes inventions in semiconductor processing and deposition technology. He is credited with 6 patents and has worked with Ulvac, Inc. and Sanyo Electric Co., Ltd.

Latest Patents

Tonari’s latest patent, “Etching Method,” describes a process that uses reactive plasma containing hydrogen and nitrogen, together with a fluorine-containing gas, to generate a precursor for etching a workpiece. The method also treats the discharge tube’s inorganic-oxide inner surface with hydrogen plasma followed by oxygen plasma.

His “Deposition Apparatus and Deposition Method” patent addresses the inclusion of unwanted components at interfaces between deposited films. The apparatus uses a quartz partition wall and a protective plate containing yttria, silicon nitride, or silicon carbide. It alternates between plasma deposition of a silicon-containing semiconductor film and selective plasma etching of material deposited on trench or hole sidewalls.

Career Highlights

Tonari’s listed professional affiliations include Ulvac, Inc. and Sanyo Electric Co., Ltd. His patent work reflects a focus on plasma-based etching and controlled semiconductor-film deposition.

Collaborations

His listed coworkers include Tsutomu Nishihashi and Hiroshi Hashimoto.

Conclusion

Kazuhiko Tonari’s patents address practical challenges in semiconductor manufacturing, including etching performance and the control of film composition at deposition interfaces.