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US 6,888,174 B2Granted
Opto-electronic semiconductor component
AssigneePatent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH
InventorsKlaus Höhn, Dieter Meiss
Life of this patent
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Abstract
For improved ageing stability, an inorganic UV stabilizer, especially cerium aluminate, is added to the polymer so that the UV stability is improved.
Claims9
An opto-electronic semiconductor component with a semiconductor body that emits electromagnetic radiation of a wavelength range with an intensity maximum at a wavelength ≧420 nm, the semiconductor body being embedded in a potting resin which comprises a UV-stable polymer based on a transparent reactive resin matrix and a UV light stabilizer,
- wherein the UV light stabilizer is an inorganic material which absorbs radiation well at least in the range of from 360 to 400 nm and as far as possible only deactivates non-radiatively, the stabilizer absorbing the UV component ≦400 nm of the emission by the semiconductor body;
- and the proportion of the stabilizer in relation to the potting resin is from 1 to 20% by weight and
- wherein the UV-stable polymer is transparent and is selected from the group of materials PMMA, polycarbonate, optical nylon, olefin copolymer, silicone material and epoxy-containing plastic.
Dependencies are inferred from the claim text.