US 11,888,095 B2
Manufacturing process for an optoelectronic device
Ralf Grottenmueller, Wiesbaden (DE); Abraham Casas Garcia-Minguillan, Wiesbaden (DE); Fumio Kita, Wiesbaden (DE); Christoph Landmann, Darmstadt (DE); and Fabian Blumenschein, Mossautal (DE)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 16/755,175
Filed by Merck Patent GmbH, Darmstadt (DE)
PCT Filed Oct. 10, 2018, PCT No. PCT/EP2018/077539
§ 371(c)(1), (2) Date Apr. 10, 2020,
PCT Pub. No. WO2019/072881, PCT Pub. Date Apr. 18, 2019.
Claims priority of application No. 17196362 (EP), filed on Oct. 13, 2017.
Prior Publication US 2021/0193879 A1, Jun. 24, 2021
Int. Cl. H01L 33/50 (2010.01); C08G 77/54 (2006.01); C08G 77/62 (2006.01); C09K 11/02 (2006.01)
CPC H01L 33/502 (2013.01) [C08G 77/54 (2013.01); C08G 77/62 (2013.01); C09K 11/02 (2013.01); H01L 2933/0041 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A process for manufacturing an optoelectronic device comprising the following steps:
(a-1) applying a layer of a formulation comprising (i) a polymer containing a silazane repeating unit M1, and (ii) at least one wavelength converting material to an optoelectronic device precursor;
(a-2) precuring the layer on the precursor by exposure to radiation, wherein steps (a-1) and (a-2) are successively carried out two or more times so that a precursor comprising two or more precured layers is obtained; and
(b) curing the precured layers on the precursor by exposure to heat or radiation
wherein the silazane repeating unit M1 is represented by formula (I):
—[—SiR1R2—NR3—]—  (I)
wherein R1, R2 and R3 are independently from each other hydrogen or alkyl; and
wherein the polymer contains a further repeating unit M2, wherein M2 is represented by formula (II):
—[—SiR4R5—NR6—]—  (II)
wherein R4, R5 and R6 are independently from each other hydrogen or alkyl; and
wherein M2 is different from M1.