Patent ID: 8946848
Filing Date: 2015-02-03
Classification: B82Y,H01L

Abstract:
1. A backside illuminated image sensor, comprising: a substrate having a front surface and a back surface; an array of light sensitive pixels formed in the front surface of the substrate, each pixel including at least one photodiode; a carbon nanotube conductive coating disposed on the back surface of the substrate to apply a bias voltage to respective portions of the back surface of the substrate in electrical contact with each photodiode in the array of pixels; the carbon nanotube conductive coating comprising carbon nanotubes embedded in a carrier with carbon nanotubes characteristics determining an optical absorption spectra, the carbon nanotube characteristics and a thickness of the carbon nanotube conductive coating being selected so that the carbon nanotube conductive coating is at least semi-transparent at each wavelength of visible light that the array of light sensitive pixels is designed to detect.