Patent ID: 7129488
Filing Date: 2006-10-31
Classification: H01L,Y02E

Abstract:
1. A method for forming a silicon-germanjum (SiGe) optical path structure, normal to a silicon (Si) substrate surface, for infrared (IR) photodetection, the method comprising: forming a Si substrate with a surface; forming a Si feature, normal with respect to the Si substrate surface; depositing SiGe overlying the Si normal feature; forming a SiGe optical path normal structure; wherein forming a Si feature, normal with respect to the Si substrate surface includes forming a pillar with two pairs of sidewalls; wherein depositing SiGe overlying the Si normal feature includes depositing SiGe sidewalls overlying the two pairs of pillar sidewalls; and, wherein forming a SiGe optical path normal structure includes forming an optical path array-structure adjacent the corresponding pillar sidewall pairs.