Title:
WAVELENGTH CONVERSION SHEET, SHEET COVERING ELEMENT, AND OPTICAL SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP2018041860
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a wavelength conversion sheet capable of suppressing backscattering while reducing variations in chromaticity, a sheet covering element having excellent long-term reliability, and an optical semiconductor device having good light extraction efficiency.SOLUTION: A wavelength conversion sheet 1 includes in order in a thickness direction; a phosphor layer 3 for covering an optical semiconductor element; and a light diffusing layer 2 disposed on a side of the phosphor layer 3 opposite to the optical semiconductor element. The light diffusing layer 2 contains a first resin and light diffusing particles. The light diffusing layer 2 has a thickness T of 30 μm or more and 100 μm or less. An absolute value D1 of a refractive index difference between the first resin and the light diffusing particles is 0.12 or more and 0.18 or less.SELECTED DRAWING: Figure 1
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Inventors:
SUZUKI KAZUAKI
MATSUDA HIROKAZU
MATSUDA HIROKAZU
Application Number:
JP2016175383A
Publication Date:
March 15, 2018
Filing Date:
September 08, 2016
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
H01L33/58; B32B7/02; G02B5/02; G02B5/20; H01L33/50; H01L33/54; H01L33/56; H01L33/60
Attorney, Agent or Firm:
Hiroyuki Okamoto
Shinichi Uda
Shinichi Uda