Journal of the Horological Institute of Japan

[title in Japanese]

Article type: Cover
1992 Volume 143 Pages Cover1-
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_Cover1

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[title in Japanese]

Article type: Cover
1992 Volume 143 Pages Cover2-
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_Cover2

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Analysis of Various Characteristics for Length Extensional Mode Quartz Crystal Resonator Comprising Plural Vibration Bars

Hirofumi KAWASHIMA, Mitsuhiro NAKAZATO

Article type: Article
1992 Volume 143 Pages 1-14
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_1

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This paper describes an analysis of various characteristics for a length extensional mode quartz crystal resonator comprising plural vibration bars. An object of this paper is to clarify motional inductance L_1, frequency characteristics and frequency temperature behavior for the resonator. Another object is to provide a resonator with very short start-up time in an oscillator circuit. First, it is shown theoretically and experimentally that motional inductance L_1 is inversely proportional to number of vibration bars. Start-up time becomes very short in proportion to L_1. Finally, resonant frequency and frequency temperature behavior for a resonator comprising plural vibration bars are found to be approximately the same as that with one vibration bar.

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Color of TiN Film by RF Ion Plating

Yutaka NAKAMURA

Article type: Article
1992 Volume 143 Pages 15-26
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_15

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RF ion plating is a dry coating process. We have investigated the relation between nitrogen gas flow rate and color of titanium nitride film by use of the RF ion plating method. We have also investigated the relation between pressure change during film deposition and color reproducibility of titanium nitride film by use of a quadrupole mass spectrometer. It was observed that color of titanium nitride changes from titanium color to gold and further to red brown gradually with the increase of nitrogen gas flow rate. Gas elements of deposited titanium nitride film was found to be nitrogen gas as reactive gas and hydrogen gas. Hydrogen gas produced by oxyhydrogen out of equipment decreased with the lapse of evaporation time. It is considered that oxigen element reacted to titanium vapor. Color of titanium nitride film is brighter for less hydrogen element and darker for more hydrogen element under the same condition.

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[title in Japanese]

[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...

Article type: Article
1992 Volume 143 Pages 27-43
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_27

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[title in Japanese]

[in Japanese]

Article type: Article
1992 Volume 143 Pages 44-47
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_44

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[title in Japanese]

[in Japanese]

Article type: Article
1992 Volume 143 Pages 48-52
Published: December 20, 1992
Released on J-STAGE: November 09, 2017

DOIhttps://doi.org/10.20805/tokeieafj.143.0_48

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