Title:
NEAR INFRARED CUT-OFF FILTERS
Document Type and Number:
WIPO Patent Application WO/2011/055726
Kind Code:
A1
Abstract:
Provided is an inexpensive near infrared cut-off filter which, by being provided with a thin-film attenuation layer that effectively blocks α rays emitted from substrate glass and that is in a form so as to not influence optical characteristics, can even be used as cover glass for a solid state imaging sensor package. The thin-film attenuation layer for attenuating α rays emitted from substrate glass is formed on at least one light-permeable surface of substrate glass produced from fluorophosphate glass containing CuO or phosphate glass containing CuO.
Inventors:
KAMIJYO KATSUSHI (JP)
HOSHINO HAJIME (JP)
HOSHINO HAJIME (JP)
Application Number:
PCT/JP2010/069523
Publication Date:
May 12, 2011
Filing Date:
November 02, 2010
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
KAMIJYO KATSUSHI (JP)
HOSHINO HAJIME (JP)
KAMIJYO KATSUSHI (JP)
HOSHINO HAJIME (JP)
International Classes:
G02B5/22; H01L27/14
Foreign References:
| JP2009075189A | 2009-04-09 | |||
| JP2005353718A | 2005-12-22 | |||
| JPH08306894A | 1996-11-22 | |||
| JP2009139925A | 2009-06-25 | |||
| JP2007277043A | 2007-10-25 | |||
| JP2009157273A | 2009-07-16 | |||
| JP2002373977A | 2002-12-26 |
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
Spring name Kenji (JP)
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