Patent ID: 11888095
Assignee: MERCK PATENT GMBH
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
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.