Led reflective package
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United States of America Patent
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Issued Date -
May 15, 2008
app pub date -
Nov 9, 2007
filing date -
Nov 9, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An LED package which employs a high temperature plastic or polymeric material which is compatible with widely used gold-tin eutectic solder and which can replace the higher cost ceramic used in conventional LED packages. The novel LED package has a high thermal conductivity substrate, a high reflectivity for visible light and/or UV light, and good aging properties. The high temperature material is a high temperature liquid crystal polymer (LCP) having a melting temperature greater than about 340.degree. C. and has small filler particles near the surface, the particles having a refractive index greater than about 2.0, and a size range of about 0.2 to 0.3 microns. For an LED package which is reflective to UV light, a UV stabilizer can be included in the plastic material to improve reflectivity in the ultraviolet spectrum and to protect from UV degradation of the plastic material which can be caused by UV light emitted by some LEDs.
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