Title:
POLYCRYSTALLINE DIAMOND THIN FILM, PHOTOCATHODE AND ELECTRON TUBE USING IT
Document Type and Number:
WIPO Patent Application WO/2001/063025
Kind Code:
A1
Abstract:
A polycrystalline diamond thin film which has an average particle size of at least 1.5 $g(m)m and a peak intensity in the vicinity of wavelength of 1580 cm?-1¿ in a Raman spectrum obtained by a Raman spectroscopy having a ratio of up to 0.2 with respect to a peak intensity in the vicinity of wave number of 1335 cm?-1¿. A photocathode (2) and an electron tube (1) are each provided with the above polycrystalline diamond thin film as a light absorbing layer (22).
Inventors:
Niigaki, Minoru c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Uchiyama, Shoichi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kan, Hirofumi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Uchiyama, Shoichi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kan, Hirofumi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Application Number:
PCT/JP2001/001287
Publication Date:
August 30, 2001
Filing Date:
February 22, 2001
Export Citation:
Assignee:
HAMAMATSU PHOTONICS K.K. (1126-1, Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Niigaki, Minoru c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Uchiyama, Shoichi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kan, Hirofumi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Niigaki, Minoru c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Uchiyama, Shoichi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
Kan, Hirofumi c/o Hamamatsu, Photonics 1126-1 K. K. (Ichino-cho Hamamatsu-shi, Shizuoka, 435-8558, JP)
International Classes:
C30B29/04; C23C16/27; H01J1/34; H01J40/06; H01J43/08; (IPC1-7): C30B29/04; H01J1/34; H01J40/06
Attorney, Agent or Firm:
Hasegawa, Yoshiki (SOEI PATENT AND LAW FIRM, Okura-honkan 6-12 Ginza 2-chome Chuo-ku, Tokyo, 104-0061, JP)
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