US 12,109,771 B2
Manufacture of optical diffusers composed of reflowable materials
Ji Wang, Singapore (SG); Kam Wah Leong, Singapore (SG); QiChuan Yu, Singapore (SG); and Yeu Woon Chan, Singapore (SG)
Assigned to ams Sensors Singapore Pte. Ltd., Singapore (SG)
Appl. No. 17/422,255
Filed by ams Sensors Singapore Pte. Ltd., Singapore (SG)
PCT Filed Feb. 20, 2020, PCT No. PCT/SG2020/050083
§ 371(c)(1), (2) Date Jul. 12, 2021,
PCT Pub. No. WO2020/176037, PCT Pub. Date Sep. 3, 2020.
Claims priority of provisional application 62/810,058, filed on Feb. 25, 2019.
Prior Publication US 2022/0088895 A1, Mar. 24, 2022
Int. Cl. B29D 11/00 (2006.01); G02B 1/04 (2006.01); G02B 5/02 (2006.01)
CPC B29D 11/00798 (2013.01) [B29D 11/00307 (2013.01); G02B 5/0268 (2013.01); G02B 1/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method comprising:
providing a substrate composed of a polymer material and having openings therein;
dispensing an reflowable optical diffuser material into the openings;
hardening the optical diffuser material to form a sheet composed of regions of the optical diffuser material surrounded laterally by the polymer material; and
separating the sheet into a plurality of optical diffuser elements,
wherein the optical diffuser elements retain their mechanical stability and optical properties when subjected to reflow processes at a temperature of more than 270° C.