Epistar Corporation

TSMC Solid State Lighting Ltd.

Taiwan Semiconductor Manufacturing Comp. Ltd.

Shang-Yu Tsai

Hsiao-Wen Lee

Yu-Sheng Tang

Hsin-Hung Chen

Chung Yu Wang

Ching-Yi Chen

Pei-Wen Ko

Tien-Ming Lin

Hao-Yu Yang

Sheng-Shin Guo

Chi Xiang Tseng

Hao-Wei Ku

Chyi Shyuan Chern

Hsin-Hsien Wu

Tien-Min Lin

Fu-Wen Liu

Huai-En Lai

A light emitting diode (LED) with a micro-structure lens includes a LED die and a micro-structure lens. The micro-structure lens includes a convex lens portion, at least one concentric ridge structure surrounding the convex lens portion, and a lower portion below the convex lens portion and the at least one concentric ridge structure. The lower portion is arranged to be disposed over the LED die. A first optical path length from an edge of the LED die to a top center of the microstructure lens is substantially the same as a second optical path length from the edge of the LED die to a side of the micro-structure lens.

Method of fabricating light-emitting diode with a micro-structure lens

An optical emitter is fabricated by bonding a Light-Emitting Diode (LED) die to a package wafer, electrically connecting the LED die and the package wafer, forming a phosphor coating over the LED die on the package wafer, molding a lens over the LED die on the package wafer, molding a reflector on the package wafer, and dicing the wafer into at least one optical emitter.

Wafer level reflector for LED packaging

Two or more molded ellipsoid lenses are formed on a packaged LED die by injecting a glue material into a mold over the LED die and curing the glue material. After curing, the refractive index of the lens in contact with the LED die is greater than the refractive index of the lens not directly contacting the LED die. At least one phosphor material is incorporated into the glue material for at least one of the lenses not directly contacting the LED die. The lens directly contacting the LED die may also include one or more phosphor material. A high refractive index coating may be applied between the LED die and the lens.

Refractive index tuning of wafer level package LEDs

Light emitting diode with a micro-structure lens having a ridged surface

Growing community of inventors

Hsinchu, Taiwan

Shang-Yu Tsai