Manufacture of optical diffusers composed of reflowable materials
Assigneeams Sensors Singapore Pte. Ltd.
InventorsJi Wang, Kam Wah Leong, QiChuan Yu, Yeu Woon Chan
Life of this patent
Estimating the term…
Abstract
A method of making optical diffuser elements (20) includes providing a substrate (100) composed of a polymer material and having openings (102) therein. An optical diffuser material (110) is dispensed into the openings (102), and the optical diffuser material (110) is hardened to form a sheet (200) composed of regions of the optical diffuser material (110) surrounded laterally by the polymer material. The method includes separating the sheet (200) into multiple optical diffuser elements (30) that retain their mechanical stability and optical properties when subjected to a reflow process.
Claims12
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.
An optical diffuser element comprising:
- a first epoxy operable to diffuse light in the visible range part of the electromagnetic spectrum;
- and
- a black epoxy material laterally surrounding the first epoxy material,
- wherein the optical diffuser element retains its mechanical stability and optical properties when subjected to a reflow process,
- wherein the optical diffuser elements retains its mechanical stability and optical properties when subjected to a temperature of higher than 270° C.
Dependencies are inferred from the claim text.