Manufacturing process for an optoelectronic device
AssigneeMerck Patent GmbH
InventorsRalf Grottenmueller, Abraham Casas Garcia-Minguillan, Fumio Kita, Christoph Landmann, Fabian Blumenschein
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Abstract
The present invention relates to a process for manufacturing an optoelectronic device, wherein a layer of a formulation containing a silazane polymer and a wavelength converting material is applied to an optoelectronic device precursor, precured by exposure to radiation and then cured. There is further provided an optoelectronic device, preferably a light emitting device (LED) or a micro-light emitting device (micro-LED), which is prepared by said manufacturing process.
Claims18
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.
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 M3, wherein M3 is represented by formula (III):
- —[—SiR7R8—[O—SiR7R8—]a—NR9—]— (III)
- wherein
- R7, R8, R9 are independently from each other hydrogen or alkyl;
- and
- a is an integer from 1 to 60.
Dependencies are inferred from the claim text.