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Dive into the research topics where Yasuharu Matsumura is active.

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Featured researches published by Yasuharu Matsumura.


Bunseki Kagaku | 1991

Quantitative analysis of tungsten silicide film and borophosphosilicate glass film deposited on a silicon wafer using electron probe microanalysis.

Noriko Makiishi; Akira Yamamoto; Teruo Okano; Yasuharu Matsumura

ウエハ上のタングステンシリサイド(WSix)膜とボロホスホシリケイト(BPSG)膜についてX線マイクロアナライザー(EPMA)による組成定量法を検討した.基板シリコンの影響を防止するため電子の侵入深さが浅い低加速電圧法を採用し,分析深さと感度を基準に加速電圧や分析線など最適な測定条件を決定した.又定量補正(ZAF)条件及びカーボン蒸着による強度減衰の補正法も検討した.その結果WSix膜ではタングステンのMα線(WMα)とケイ素のKα線(SiKα)を用いれば分析深さがサブミクロンレベルで制御できること,ZAFの原子番号補正にはPhilibert-Tixier法が適していることが分かった.加速電圧10kVで0.5μmの膜を分析した結果,タングステンとケイ素のモル比xの分析精度σは0.02(x=2.42)であった.BPSG膜では加速電圧5kVが組成分析に最適で,20kVで酸素のKα線(OKα)強度を測定すれば膜厚も分析できることが分かった.カーボン蒸着によるX線強度の減衰は同時に測定した炭素のKα線(CKα)強度を用いて補正した.検量線の正確さσdは,ホウ素濃度が0.12wt%(測定範囲2~5wt%),リン濃度が0.10wt%(2~5wt%),膜厚が170Å(3000~11000Å)であった.


Archive | 1985

Test medium and method for detecting phosphorus segregates in metallic material

Yoshiko Funahashi; Yoshikazu Kamino; Yasuharu Matsumura; Sen-ichi Harimaya


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1991

Analysis of High-purity Iron with Inductively Coupled Plasma Source Mass Spectrometry

Teruo Okano; Yasuharu Matsumura


Analytical Sciences | 1991

INVESTIGATION OF DIRECT SAMPLE INSERTION AND TUNGSTEN FILAMENT ELECTROTHERMAL VAPORIZATION FOR MICRO SAMPLE ANALYSIS BY ICP-AES

Kyoko Fujimoto; Teruo Okano; Yasuharu Matsumura


Bulletin of the Japan Institute of Metals | 1987

Method for detecting phosphorus segregates in steel

Yoshiko Funahashi; Yasuharu Matsumura; Sen-ichi Harimaya; Yoshikazu Kamino; Hidenari Kitaoka


Bunseki Kagaku | 1986

Determination of trace amounts of phosphorus and boron in steel and simplification of classified calibrations by ICP-AES using micro injection technique.

Kyoko Fujimoto; Teruo Okano; Yasuharu Matsumura; Sen-ichi Harimaya


Archive | 1985

Method for detecting phosphorus segregates in metallic material

Yoshiko Funahashi; Yoshikazu Kamino; Yasuharu Matsumura; Sen-ichi Harimaya


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 1992

State Analysis of Laves Phase in 9Cr-1Mo Steel by Controlled-Potential Secondary Electrolysis Method

Yoshiko Funahashi; Sachiko Tanimoto; Naoshi Yoshida; Yasuharu Matsumura; Atsushi Sasaki


Bunseki Kagaku | 1992

Determination of trace elements in solid samples by ICP-AES utilizing direct sample insertion technique.

Kyoko Fujimoto; Teruo Okano; Yasuharu Matsumura


Archive | 1985

Test medium solution for detecting phosphorus segregates in metallic material

Yoshiko Funahashi; Yoshikazu Kamino; Yasuharu Matsumura; Sen-ichi Harimaya

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Yoshiko Funahashi

Kawasaki Steel Corporation

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Sen-ichi Harimaya

Kawasaki Steel Corporation

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Yoshikazu Kamino

Kawasaki Steel Corporation

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Teruo Okano

Kawasaki Steel Corporation

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Yoshihide Endo

Kawasaki Steel Corporation

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Kyoko Fujimoto

Kawasaki Steel Corporation

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Takashi Sugihara

Kawasaki Steel Corporation

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Akira Yamamoto

Kawasaki Steel Corporation

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Sachiko Tanimoto

Kawasaki Steel Corporation

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Akira Yasuda

Kawasaki Steel Corporation

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