Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With housing or contact structure
Reexamination Certificate
2011-01-11
2011-01-11
Ha, Nathan W (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
With housing or contact structure
C257SE33075
Reexamination Certificate
active
07868347
ABSTRACT:
A new SMD (surface mount devices) package design for efficiently removing heat from LED Chip(s) is involved in this invention. Different from the regular SMD package, which electrical isolated materials like Alumina or AlN are used, the substrate material here is metal like Copper, Aluminum and so on. Also, different from regular design, which most time only has one LED chip inside, current design will at least have two or more LED chips (or chip groups) in one package. All chips are electrical connected via metal blocks, traces or wire-bond. This type of structure is generally fabricated via chemical etching and then filled with dielectric material inside to form a strong package. Because the thermal conductivity of the metal is much higher than the ceramics, the package thermal resistance is much lower than the ceramics based package. Also, the cost of the package is much lower than ceramics package. Moreover, emitting area in one package is much larger than the current arts.
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Ha Nathan W
Sky Advanced LED Technologies Inc
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