Title:
The cover glass for photoelectric conversion devices
Document Type and Number:
Japanese Patent JP6039962
Kind Code:
B2
Abstract:
A cover glass of the present invention for photoelectric conversion devices includes a glass sheet having surface asperities and a reflection-reducing film formed over the surface asperities of the glass sheet. The surface asperities of the glass sheet have an average spacing Sm of 0.3 mm or more and 2.5 mm or less and an arithmetic average roughness Ra of 0.3 µm to 5 µm. The reflection-reducing film includes fine silica particles having an average particle diameter of 50 to 200 nm and a binder for the fine silica particles, and the fine silica particles are uniformly arranged in a single layer on peak portions of the surface asperities in such a manner that a filling fraction F is 35 to 65%. A transmittance gain is 2.37% or more, the transmittance gain being obtained by subtracting an average transmittance of the glass sheet as measured when light having wavelengths ranging from 380 to 1100 nm are incident on a face of the glass sheet that has the surface asperities, from an average transmittance of the cover glass as measured when light having the wavelengths are incident on a reflection-reducing film side of the cover glass. Thus, a cover glass for photoelectric conversion devices that exhibits a high transmittance gain is provided.
Inventors:
Fumika Kondo
Takeshi Takeda
Mitsuhiro Kawazu
Takeshi Takeda
Mitsuhiro Kawazu
Application Number:
JP2012171266A
Publication Date:
December 07, 2016
Filing Date:
August 01, 2012
Export Citation:
Assignee:
NIPPON SHEET GLASS COMPANY,LIMITED
International Classes:
G02B5/02; G02B1/11; G02B1/111; H01L31/04; H01L31/048
Domestic Patent References:
| JP2009088503A |
Foreign References:
| WO2011070714A1 |
Attorney, Agent or Firm:
Koichi Kamata