Patent ID: 7994463
Filing Date: 2011-08-09
Classification: H01L

Abstract:
1. A method for fabricating a pixellated transducer for absorbing electromagnetic radiation in a predetermined range of wavelengths, the method comprising the steps of: depositing an antireflection (AR) coating on a surface of a first wafer of a first predetermined material; bonding a second wafer of a second predetermined material to said surface of the first wafer of said first predetermined material; lapping and polishing to a predetermined thickness the second wafer of said second predetermined material; the lapped and polished second wafer of said second predetermined material comprising a layer of said second predetermined material; patterning the layer of said second predetermined material according to a first predetermined pattern; filling the patterned layer with a filling material; replanarizing an exposed surface of the filled patterned layer; depositing a polymer layer on the replanarized surface; the polymer layer absorbing the electromagnetic radiation in the predetermined range of wavelengths; patterning in the polymer layer according to a second predetermined pattern; and removing the second predetermined material, which is a sacrificial material, whereby the filling material provides structural support between the patterned polymer layer and the first wafer when the sacrificial, second predetermined material is removed.