Patent Number: 8,318,516

Title: Method of wafer level purifying light color emitting from a light emitting semiconductor wafer

Abstract: A method of wafer level purifying light color of a LED semiconsuctor is disclosed. After a LED wafer is fabricated, multi-transparent films formed of first layer and a second layer alternatively until reaching a predetermined number deposited by e-gun deposition with an aid of ion plasma beam. The first layer is formed of an oxide layer and the second layer is formed of a metal oxide layer. The two materials, one has a high index of refraction and the other has a low index of refraction. The total multi-transparent films are about 80 to 120 layer which can narrow wave width about a central wavelength.

Inventors: Chen; Wen-Pin (Taipei County, TW)


International Classification: H01L 21/00 (20060101)

Expiration Date: 2021-11-27 0:00:00