Patent ID: 7005237

Claim:
A photolithographic method of making an information storage device having different storage characteristics at a plurality of discrete memory locations thereon, comprising the steps of, (a) providing a substrate having a surface portion, said surface portion having a linking group coupled thereto, said linking group having a photocleavable protecting group thereon; (b) exposing at least one first discrete segment of said surface portion to radiant energy sufficient to cleave said protecting group from said linking group and generate a deprotected linking group, so that said linking group is deprotected in at least one first discrete memory location and said linking group remains protected in at least one second discrete memory location; (c) coupling a first charge storage group to said deprotected linking group at said at least one first discrete memory location; (d) exposing said at least one second discrete memory location to radiant energy sufficient to cleave said protecting group from said linking group and generate a deprotected linking group in said at least one second discrete memory location; and then (e) coupling a second charge storage group to said linking group at said at least one second discrete memory location, wherein said second charge storage (group is different from said first charge storage group, to thereby produce an information storage device having different storage characteristics at a plurality of discrete memory locations.