Patent ID: 7692275
Filing Date: 2010-04-06
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a wafer; a plurality of first devices on said wafer, wherein said first devices comprise a first material, having a first reflectivity; a plurality of second devices on said wafer, wherein said second devices comprise a second material different from said first material, said second material having a second reflectivity different from said first reflectivity; and a plurality of first fill structures and second fill structures on said wafer, wherein said first fill structures and said second fill structures comprising non-functioning devices positioned laterally relative to said first devices and said second devices, wherein said first fill structures and said first devices have a essentially a same first structure such that said first fill structures comprise said first material, wherein said second fill structures and said second devices have essentially a same second structure such that said second fill structures comprise said second material, and wherein distribution of said first fill structures and said second fill structures across said wafer relative to said first devices and said second devices is such that reflectance across said wafer is approximately uniform.