Patent ID: 8575645
Filing Date: 2013-11-05
Classification: H01L

Abstract:
1. A thin multi-layer LED array engine, comprising: a substrate, including a central region, a peripheral region, and an edge, a top surface of the substrate in the central region being served as a light output surface, the peripheral region lying between the edge and the central region, the substrate in the peripheral region having a top surface with two grooves formed thereon, a lateral surface, and a bottom surface; an encapsulation body, encapsulating the peripheral region including the top surface, the lateral surface and the bottom surface, but not encapsulating the central region, the encapsulation body having an encapsulation chamber formed on the light output surface; two lead frames, each of the two lead frames having an inner end portion and an outer end portion, the inner end portions of the two lead frames being disposed in the two grooves on the top surface of the substrate in the peripheral region, respectively, the inner end portions of the two lead frames being encapsulated by the encapsulation body, but the outer end portions of the two lead frames are exposed outside of the encapsulation body; a plurality of LED dices, disposed on the light output surface, the LED dices being electrically connected to the two lead frames; a phosphor layer, disposed on the LED dices, the phosphor layer making direct contact with the substrate; and a silica gel protection layer, disposed on the phosphor layer; wherein a plurality of first small cavities are formed on the top surface, and two ring-shaped grooves are arranged in two sides of the first small cavities.