Optoelectronic component and method for the production thereof
View Patent ↗An optoelectronic component includes a housing which includes a first partial region having a first thermoplastic material crosslinked by irradiation and a second partial region having a second thermoplastic material, a recess in the housing, and a radiation-emitting device disposed in the recess.
1. An optoelectronic component comprising:
a housing which comprises a first partial region having a first thermoplastic material crosslinked by irradiation and a second partial region having a second thermoplastic material; wherein the first partial region is formed as a housing base body, the second partial region is formed as a reflector, the second partial region is disposed on the first partial region, the second partial region is additionally disposed on an upper side of the housing base body,
a recess in the housing; and
a radiation-emitting device that emits radiation and is disposed in the recess;
wherein the first partial region is protected by the second partial region from the radiation, and wherein the second partial region is protected by the first partial region from excessive temperatures, the second thermoplastic material has a higher degree of reflectivity with respect to the radiation emitted by the radiation-emitting device than the first thermoplastic material, the first thermoplastic material is at least selected from the group consisting of polyetherimide, polysulfone, polyphenyl sulfide, LCPs and PEEK, and the second thermoplastic material is at least selected from the group consisting of polyamide, polybutylene terephthalate, polyethylene terephthalate, polyester, polyester copolymers and fluorinated polymers.
2. The optoelectronic component as claimed in claim 1 , wherein the first thermoplastic material is different from the second thermoplastic material.
3. The optoelectronic component as claimed in claim 1 , wherein the first thermoplastic material has a higher thermal stability than the second thermoplastic material.
4. The optoelectronic component as claimed in claim 1 , wherein after crosslinking, the first thermoplastic material has a thermal stability up to a temperature of at least 275° C.
5. The optoelectronic component as claimed in claim 1 , wherein the first thermoplastic material contains a crosslinking additive.
6. The optoelectronic component as claimed in claim 5 , wherein the crosslinking additive is at least one selected from the group consisting of triallyl isocyanate, trimethylolpropane triacrylate and pentaerythriol triacrylate.
7. The optoelectronic component as claimed in claim 1 , wherein the second thermoplastic material is radiation-crosslinked.
8. A method of producing the optoelectronic component as claimed in claim 1 , comprising:
A) forming the first partial region of the housing from a material which comprises the first thermoplastic material, wherein the first partial region is formed as a housing base body;
B) forming the second partial region of the housing from a material which comprises the second thermoplastic material, wherein the second partial region is formed as a reflector, the second partial region is disposed on the first partial region, and the second partial region is additionally disposed on the upper side of the housing base body;
C) irradiating the first partial region so that the first thermoplastic material is crosslinked; and
D) introducing the radiation-emitting device into the recess of the housing wherein radiation-emitting device can emit radiation, the first partial region is protected by the second partial region from the radiation, the second thermoplastic material has a higher degree of reflectivity with respect to the radiation, which is emitted by the radiation-emitting device, than the first thermoplastic material, the first thermoplastic material is at least selected from the group consisting of polyetherimide, polysulfone, polyphenyl sulfide, LCPs and PEEK, and the second thermoplastic material is at least selected from the group consisting of polyamide, polybutylene terephthalate, polyethylene terephthalate, polyester, polyester copolymers, and fluorinated polymers.
9. The method as claimed in claim 8 , wherein the first partial region is irradiated in method step C) with an irradiation dosage of 33 to 165 kGy.
10. The method as claimed in claim 8 , wherein the forming in method step A) is effected by injection-molding.