Wavelength-converting casting composition and light-emitting semiconductor component
DC CAFCFirst Claim
Patent Images
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 resin, said pigment powder comprising luminous substance pigments from Ce-doped phosphors; and
said luminous substance pigments having grain sizes ≦
20 μ
m and a mean grain diameter d50≦
5 μ
m.
6 Assignments
Litigations
0 Petitions
Accused Products
Abstract
The wavelength-converting casting composition is based on a transparent epoxy casting resin with a luminous substance admixed. The composition is used in an electroluminescent component having a body that emits ultraviolet, blue or green light. An inorganic luminous substance pigment powder with luminous substance pigments is dispersed in the transparent epoxy casting resin. The luminous substance is a powder of Ce-doped phosphors and the luminous substance pigments have particle sizes ≦20 μm and a mean grain diameter d50≦5 μm.
-
Citations
16 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 resin, said pigment powder comprising luminous substance pigments from Ce-doped phosphors; and
said luminous substance pigments having grain sizes ≦
20 μ
m and a mean grain diameter d50≦
5 μ
m.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
a) epoxy casting resin ≧
60% by weight;
b) luminous substance pigments >
0 and ≦
25% by weight;
c) thixotropic agent >
0 and ≧
10% by weight;
d) mineral diffusor >
0 and ≦
10% by weight;
e) processing adjuvant >
0 and ≧
3% by weight;
f) hydrophobic agent >
0 and ≦
3% by weight; and
g) adhesion promoters >
0 and ≦
2% by weight.
-
-
6. The casting composition according to claim 1, wherein said Ce-doped phosphors are garnets.
-
7. The casting composition according to claim 1, wherein said Ce-doped phosphors are YAG:
- Ce based particles.
-
8. The casting composition according to claim 1, which comprises a content of iron ≦
- 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 resin, said pigment powder comprising first luminous substance pigments from Ce-doped phosphors and having grain sizes ≦
20 μ
m and a mean grain diameter d50≦
5 μ
m;
said luminous substance pigments converting a portion of the radiation originating from the at least one of 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 the at least one of the ultraviolet, blue and green spectral range. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
Specification