Cover glass for photoelectric conversion devices and method for producing the same
US9188705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2010 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Mar 2, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In order to eliminate non-uniformity in the appearance of a cover glass for photoelectric conversion devices, the reflectance curve of the cover glass is extremely flattened. Provided is a cover glass for photoelectric conversion devices that includes a glass sheet having an uneven surface such as a figured glass, and a reflection-reducing film formed on the uneven surface. The reflection-reducing film includes silica fine particles and a binder for the silica fine particles. The silica fine particles are arranged in a single layer on the top portion of the uneven surface of the glass sheet, while the silica fine particles are arranged in stacks to a thickness equivalent to at least three layers on the bottom portion of the uneven surface. The uneven surface of the glass sheet has an average spacing Sm of at least 0.4 mm but not more than 2.5 mm and an arithmetic average roughness Ra of 0.5 μm to 5 μm. The cover glass has a reflectance of at least 1.5% but not more than 3% over the entire wavelength range of 380 nm to 780 nm for incident light from the side on which the reflection-reducing film is formed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.