Claims
- 1. A wavelength-converting casting composition, for converting a wavelength of ultraviolet, blue or green light emitted by an electroluminescent component, comprising:
- a transparent epoxy casting resin;
- an inorganic luminous substance pigment powder dispersed in said transparent epoxy resin, said pigment powder comprising luminous substance pigments from a phosphorus group having the general formula A.sub.3 B.sub.5 X.sub.12 :M, where A is an element selected from the group consisting of Y, Ca, Sr; B is an element selected from the group consisting of Al, Ga, Si; X is an element selected from the group consisting of O and S; M is an element selected from the group consisting of Ce and Tb;
- said luminous substance pigments having grain sizes.ltoreq.20 .mu.m and a mean grain diameter d.sub.50 .ltoreq.5 .mu.m.
- 2. The casting composition according to claim 1, wherein said luminous substance pigments are substantially spherical particles.
- 3. The casting composition according to claim 1, wherein said luminous substance pigments are flakelike particles.
- 4. The casting composition according to claim 1, wherein the mean grain diameter d.sub.50 of said luminous substance pigments is between one and two micrometers.
- 5. The casting composition according to claim 1, which comprises the following components:
- a) epoxy casting resin.gtoreq.60% by weight;
- b) luminous substance pigments>0 and .ltoreq.25% by weight;
- c) thixotropic agent>0 and .ltoreq.10% by weight;
- d) mineral diffusor>0 and .ltoreq.10% by weight;
- e) processing adjuvant>0 and .ltoreq.3% by weight;
- f) hydrophobic agent>0 and .ltoreq.3% by weight; and
- g) adhesion promoters>0 and .ltoreq.2% by weight.
- 6. The casting composition according to claim 1, wherein said luminous substance pigments are particles of Ce-doped garnets.
- 7. The casting composition according to claim 6, wherein said luminous substance pigments are YAG:Ce particles.
- 8. The casting composition according to claim 1, which comprises a content of iron.ltoreq.20 ppm.
- 9. The casting composition according to claim 1, wherein said luminous substance pigments are formed with a silicon coating.
- 10. A light-emitting semiconductor component, comprising:
- a semiconductor body formed of a semiconductor layer sequence and being capable, during an operation of the semiconductor component, of emitting electromagnetic radiation in at least one of an ultraviolet, blue, and green spectral range;
- a wavelength-converting casting composition disposed in a vicinity of said semiconductor body, said casting composition being formed of a transparent epoxy casting resin and an inorganic luminous substance pigment powder dispersed in said transparent epoxy resin, said pigment powder comprising luminous substance pigments from a phosphorus group having the general formula A.sub.3 B.sub.5 X.sub.12 :M, where A is an element selected from the group consisting of Y, Ca, Sr; B is an element selected from the group consisting of Al, Ga, Si; X is an element selected from the group consisting of O and S; M is an element selected from the group consisting of Ce and Tb, and having grain sizes.ltoreq.20 .mu.m and a mean grain diameter d.sub.50 .ltoreq.5 .mu.m;
- said luminous substance pigments converting a portion of the radiation originating from the ultraviolet, blue and green spectral range into radiation of a higher wavelength, such that the semiconductor component emits mixed radiation including the higher-wavelength radiation and radiation from at least one of the ultraviolet, blue and green spectral range.
- 11. The light-emitting semiconductor component according to claim 10, wherein said casting composition encloses at least a part of said semiconductor body.
- 12. The light-emitting semiconductor component according to claim 10, wherein said semiconductor body is adapted to emit radiation in a blue spectral range having a maximum luminescence intensity at .lambda.=430 nm or at .lambda.=450 nm.
- 13. The light-emitting semiconductor component according to claim 10, which further comprises an opaque base housing having a recess formed therein, said semiconductor body being disposed in said recess and said recess being at least partially filled with said casting composition.
- 14. The light-emitting semiconductor component according to claim 10, wherein said casting composition is provided with various kinds of luminous substance pigments in respect to a host lattice distribution and a type and extent of doping.
CROSS-REFERENCE TO RELATED APPLICATION
This is a continuation of copending international application PCT/DE97/02139, filed Sep. 22, 1997, which designated the United States.
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Number |
Date |
Country |
0039017B1 |
Nov 1981 |
EPX |
2642465 |
Mar 1978 |
DEX |
3804293A1 |
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9013615 |
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7176794 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
PCTDE9702139 |
Sep 1997 |
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