Patent ID: 7144745
Filing Date: 2006-12-05
Classification: B81B,B81C,H01L,H03H

Abstract:
1. A method of producing a crystalline substrate based device comprising: providing a wafer including a semiconductor substrate and comprising a plurality of semiconductor microstructures each including at least one optoelectronic device; providing a wafer-level transparent packaging layer; forming a wafer-level spacer onto said wafer-level transparent packaging layer, said packaging layer and said spacer defining a plurality of cavities extending entirely through said spacer, the step of forming the wafer-level spacer including applying a spacer material separate from the wafer-level transparent packaging layer to the wafer-level transparent packaging layer; then sealing said wafer-level spacer to said wafer so that the cavities in the wafer-level spacer extend between the wafer and the transparent packaging layer; and subsequently dicing said semiconductor substrate, having said wafer-level spacer and said wafer-level transparent packaging layer sealed thereunto, to form individual chip scale packaged devices each including a microstructure, a chip scale portion of said transparent packaging layer, and a cavity disposed between the microstructure and the portion of the transparent packaging layer, wherein the process is performed without removing material of the wafer-level transparent packaging layer prior to said dicing step.