Patent ID: 8172632
Filing Date: 2012-05-08
Classification: F21K,H01L

Abstract:
1. A method of making a white LED package structure having a silicon substrate comprising: providing a silicon substrate, and performing an etching process to form a plurality of cup-structures on a top surface of the silicon substrate; forming a reflective layer on the top surface of the silicon substrate; forming a transparent insulating layer on the reflective layer; forming a plurality of metal bumps on the transparent insulating layer respectively in each cup-structure, and forming a plurality of electrodes on the transparent insulating layer between the cup-structures; respectively bonding a plurality of blue LEDs on each metal bump in each cup-structure, and electrically connecting respectively the blue LEDs to the electrodes, wherein the blue LEDs emit lights with different peak wavelengths; and mixing a plurality of kinds of phosphor powders, the plurality of kinds of phosphor powders having different absorption spectra respectively corresponding to the different peak wavelengths of the lights emitted by the plurality of blue LEDs, and adding a sealing material, and then, performing a sealing process using the mixed phosphor powders and sealing material to form a phosphor structure on the plurality of cup-structures.