Patent ID: 7964433

Claim:
A method for forming an anti-reflective device, comprising acts of: forming a micro-etch mask on a silicon substrate, the silicon substrate having a first side and a second side, with the micro-etch mask being formed on the first side; forming high-aspect ratio silicon spikes with nano-tips on the first side of the silicon substrate; and forming a first metallic layer on the first side to absorb infrared light, thereby forming an anti-reflective surface forming a photo-resist on the first side of the silicon substrate to define an aperture, the act of forming the photo-resist being performed prior to the act of forming the silicon spikes; and removing the photo-resist after the act of forming the first metallic layer, thereby creating an anti-reflection surface having an aperture extending from the first side to the second side and being surrounded by silicon spikes on the first side.