Katsumi Endo

Toyama College

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The Application of a Carbon Protective Layer to Metal Evaporated Tape

Japanese Journal of Applied Physics (1996)

Katsumi Endo Junko Ishikawa Osamu Yoshida Noriyuki Kitaori

Carbon protective layers for metal evaporated (ME) tapes were prepared using electron cyclotron resonance chemical vapor deposition (ECR-CVD). Raman spectroscopy was used to evaluate the carbon protective layers. It was found that the quantity of luminescent substances in the carbon film affected the overall durability of the protective layer. Raman spectroscopy was very useful in this analysis. Our results imply that not only hardness but also flexibility is required for the application of carbon films. The quantity of luminescent substances in the films was measured using a new parameter I b / I p , obtained from the Raman spectra. Protective layers with a particular range of I b / I p were found to be optimum durability. It is significant for the investigation of carbon protective layers that their durability can be easily determined by Raman spectroscopy.

Carbon fibers

Deposition

10.1143/jjap.35.3565

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Citations (10)

Time-resolved measurements of aromatic hydrocarbon in exhaust gas using resonance enhanced multi-photon ionization method

Kotaro Suzaki Hiroyuki Yamada Yuichi Goto Kentaro Misawa Jun Matsumoto

Flame ionization detector

Aromatic hydrocarbon

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Influence of Underlayer Magnetic Properties upon Output in Metal Particulate Double-Layered Tape

Japanese Journal of Applied Physics (1999)

Katsumi Endo Hideyuki Kobayashi Osamu Yoshida Kazuhiko Nakayama Kazuo Maki

To investigate the influence of the magnetic material and magnetic properties of the underlayer on double-layered tape output, we fabricated magnetic/magnetic double-coated metal particulate (MP) tapes with two different underlayer materials: aciculate iron (Fe) metal powder and plane barium ferrite (Ba-ferrite) powder. The aciculate Fe underlayer does not enhance the output, however the plane Ba-ferrite underlayer does, depending on the perpendicular orientation of the underlayer. A more high-density medium can be obtained using a Ba-ferrite powder oriented perpendicular to the magnetic underlayer.

Barium ferrite

Double layered

10.1143/jjap.38.l1021

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Bevel depth profiling by high-spatial-resolution sputtered neutral mass spectrometry with laser postionization

Journal of Vacuum Science & Technology B Nanotechnology and Microelectronics Materials Processing Measurement and Phenomena (2018)

Takahiro Kashiwagi Satoru Nagashima Takeharu Ishikawa Akio Takano Suet-Yi Liu

Secondary-ion mass spectrometry (SIMS) sputter depth profiling is used for the quantitative depth profile analysis of impurities. However, SIMS suffers from a large quantitative uncertainty and depth-scale uncertainty at the interfaces of heteromultilayers and in the near-surface region, because the secondary ion yield and sputtering yield are significantly influenced by matrix effects and accumulation effects of the primary ion. In this paper, the authors report on the development of a new depth profiling method with good depth-scale accuracy and low matrix effects to overcome these problems. This was achieved through the combination of high-spatial-resolution bevel depth profiling and sputtered neutral mass spectrometry with laser postionization (laser-SNMS). The sample used to evaluate this new bevel depth profiling method was a silicon on insulator wafer obtained using the separation by implantation of oxygen technique and implanted with boron. Depth profiles were obtained using both SIMS and laser-SNMS and evaluated by comparison with the stopping and range of ions in matter (SRIM) simulation. Although both methods afforded quite good depth resolutions, in SIMS the secondary ion signal intensity for boron was amplified by the influence of the matrix effect and showed a discontinuous profile shape at the interfaces, whereas the profile for boron obtained using laser-SNMS was consistent with the SRIM results and exhibited high continuity. By using a combination of the bevel depth profiling method and laser-SNMS method, it was confirmed that an easy-to-analyze depth profile could be obtained for the dopant concentration in multilayer samples, which is difficult to obtain using the conventional SIMS method.

10.1116/1.5019692

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Property Test of the Q-Factor for High Purity Copper at the Temperature of 20K

7th International Particle Accelerator Conference (IPAC'16), Busan, Korea, May 8-13, 2016 (2016)

Akihiro Iino Katsumi Endo S. Yamaguchi

10.18429/jacow-ipac2016-mopmw010

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Real-time Mass Spectrometry of Exhaust Gas from Automobiles Utilizing Laser Ionization (First Report) : Development of Simultaneous Analyzer of Multicomponents

JSAE Transactions (2009)

Kentaro Misawa Kotaro Tanaka Koichi Tanaka Jun Matsumoto Ishiuchi Shun-ichi

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Metal Particulate (MP)/Metal Evaporation (ME) Double-Layered Media for High-Density Recording

Japanese Journal of Applied Physics (1999)

Katsumi Endo Osamu Yoshida Kenji Sasaki Kazuhiko Nakayama Kazuo Maki

We have fabricated a double-layered tape composed of a metal thin film underlayer and a metal particulate (MP) upper layer. Two kinds of metal thin films–Cu nonmagnetic and Co magnetic–were deposited under the MP layer by metal evaporation (ME). We found that the magnetic underlayer affected the magnetic recording properties of the tape in high-density recording. Co magnetic underlayer tape output was significantly enhanced compared to Cu nonmagnetic underlayer tape output, especially at shorter recording wavelengths. It is possible to enhance output by introducing another high-density recording layer under the main magnetic layer. We consider that the internal magnetization of the magnetic underlayer assists the upper layer recording under this condition, providing a new way to improve the recording density of MP media.

Recording media

Double layer (biology)

Double layered

10.1143/jjap.38.l374

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MoS₂ sputtering coating for ultrahigh vacuum manipulation

Journal of Physics Conference Series (2013)

Toshiyuki Maruyama Jun Nakagawa Katsumi Endo Akira Kasahara Masahiro Goto

Lubrication applied to sliding part is one of the key components for the development of high performance driving mechanism and manipulator in ultrahigh vacuum. Some solid lubrication has been widely used for this purpose, especially molybdenum disulfide (MoS2). Low friction, low wear and low outgassing during the sliding motion on lubrication are required for a high performance manipulation in ultrahigh vacuum. Although the tribology of MoS2 has been reported to be suitable in a vacuum, the outgassing characteristics while sliding are not clean, in this work, we investigate the characteristics of MoS2 sputtering coating in order to develop high performance ultrahigh vacuum driving mechanism. Their friction and outgassing characteristics were evaluated and we have found out suitable parameters for manipulation.

Outgassing

Molybdenum disulfide

Ultra-high vacuum

Dry lubricant

10.1088/1742-6596/417/1/012048

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Investigation on the Changes in Physical Property of Bread during Storage by Using a Continuous Minute Deformation Method of the Multi-Biting Test.

NIPPON SHOKUHIN KOGYO GAKKAISHI (1992)

Shojiro Tsuji Katsumi Endo

家庭用自動製パン機で製造した食パンについて,加水量やでん粉質の添加などの条件を変えて,食パンの貯蔵にともなう物性変化を連続式微小変形多重バイト試験法などで検討した.(1) 食パンの貯蔵(常温および冷蔵)にともなうみかけの硬さの変化は,板状プランジャーを用いた連続式微小変形多重バイト試験法のバイト率(10～35%)とプランジャーのプラスの仕事量との関係を示す一次式の勾配で明瞭に示された.(2) 小麦粉に20%のポテトフレークを置換添加した食パンにおいて,一定の範囲で加水量を増加させると,貯蔵(老化)にともなうクラムのみかけの硬さの増加が少なくなることが数字的に示された.(3) 食パンの組織の老化にともなうクラムの回復力のバイト率(変形の程度)にともなう微細な変化も,連続式微小変形多重バイト試験法の2バイト型の同一バイト率におけるプランジャーの仕事量の比で比較できる.(4) 食パンのクラムの回復力の差は,バイト率と1回目のバイトのプランジャーの仕事量に対する特定のバイト率におけるプランジャーの仕事量の比の値との関係を示す一次式の勾配で比較できる.貯蔵にともない食パンのクラムの組織の老化が進むとこの勾配の値は小さくなった.(5) 食パンの液状試料の多重バイト試験法による各種のパラメーターの値の比較により,食パンの貯蔵にともなうでん粉の老化による物性変化(液状試料のみかけの粘度の低下など)を明瞭に示すことができる.これらの変化はパンを口腔内でだ液と共にそしゃくした時の物性変化の解析にも有用であると考えられる.

Physical property

Biting

10.3136/nskkk1962.39.25

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Effect of Surface Treatments on Adsorption and Tribology of the Diamond-Like-Carbon Layer for Metal-Evaporated Tape

Japanese Journal of Applied Physics (1998)

Tatsuo Miyamura Osamu Yoshida Katsumi Endo Akira Ishikawa Noriyuki Kitaori

Metal-evaporated (ME) tape presents greater problems for smooth tracking and has poor durability than metal-particulate (MP) tape; a diamond-like-carbon (DLC) layer and a lubricant layer were used to cover the magnetic layer to overcome these problems. The surface state of the DLC protective layer must be controlled to enable the adsorption of fluorine of the lubricant. We investigated the surface state of the DLC protective layer using three types of surface treatments–aqua dipping, N 2 plasma treatment, and a combination of the two–to study the change in lubricant adsorption. We found that N 2 plasma treatment provided the most favorable surface for the realizaton of optimal ME tape properties.

Diamond-like carbon

Carbon fibers

Surface layer

10.1143/jjap.37.6153

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Citations (2)