Patent ID: 6620462
Filing Date: 2003-09-16
Classification: C03C,G02B

Abstract:
A method for the prevention of backside material contamination, comprising the steps of:providing a substrate, said substrate having a first and a second surface; depositing a layer of backside material over the first surface of said substrate; depositing a first layer of amorphous silicon (Aâ€”Si) over the second surface of said substrate; depositing a second of layer of amorphous silicon (Aâ€”Si) over the surface of said layer of backside material; depositing a layer photoresist over the surface of said second layer of amorphous silicon (Aâ€”Si); removing said layer of photoresist from the surface of said second layer of amorphous silicon (Aâ€”Si); and removing said first layer of amorphous silicon (Aâ€”Si) from the second surface of said substrate.