LED array

Details LED array LED array

2004-11-19

2010-02-09

Louie, Wai-Sing (Department: 2814)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With reflector, opaque mask, or optical element integral...

C257S079000, C257S088000, C257S092000, C257S100000, C257SE33001

Reexamination Certificate

active

07659547

ABSTRACT:
An illuminator (1) has bare semiconductor die light emitting diodes (7) on pads (11) of Ag/Ni/Ti material. A Si wafer (13) has a rough upper surface, and this roughness is carried through an oxide layer (12) and the pads (11) to provide a rough but reflective upper surface of the pads (11), thus forming a diffuser. Epoxy encapsulant (9) is deposited in a layer over the diodes (7) and the pads (11), and it is index matched with a top diffuser plate (8) of opal glass.

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