	US 12,074,261 B2
	Phosphor protective film, wavelength conversion sheet with release film, wavelength conversion sheet, and production method for wavelength conversion sheet
Hiroki Ichiba, Tokyo (JP); Satoshi Maruyama, Tokyo (JP); Masato Kurokawa, Tokyo (JP); and Yasuhiko Saito, Tokyo (JP)
Assigned to TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed by TOPPAN PRINTING CO., LTD., Tokyo (JP)
Filed on Apr. 23, 2021, as Appl. No. 17/239,198.
Application 17/239,198 is a continuation of application No. PCT/JP2019/041802, filed on Oct. 24, 2019.
Claims priority of application No. 2018-201688 (JP), filed on Oct. 26, 2018.
Prior Publication US 2021/0249568 A1, Aug. 12, 2021
Int. Cl. H01L 33/50 (2010.01); B32B 7/023 (2019.01); B32B 37/14 (2006.01); G02B 1/11 (2015.01)

CPC H01L 33/502 (2013.01) [B32B 7/023 (2019.01); B32B 37/14 (2013.01); G02B 1/11 (2013.01)]

17 Claims

1. A production method for a wavelength conversion sheet, comprising the steps of:

a bonding step of bonding a multilayer film and a release film together to obtain a phosphor protective film, the multilayer film including a barrier film, the release film being releasable from the multilayer film;

a phosphor layer formation step of forming a phosphor layer containing phosphors on a surface of the multilayer film of the phosphor protective film to obtain a wavelength conversion sheet with the release film; and

a release step of releasing the release film from the wavelength conversion sheet with the release film.