Method and system for forming circular patterns on a surface

Radiation imagery chemistry: process – composition – or product th – Including control feature responsive to a test or measurement

Reexamination Certificate

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C430S005000, C430S296000, C430S942000

Reexamination Certificate

active

08057970

ABSTRACT:
A method for forming circular patterns on a surface using a character projection (CP) charged particle beam writer is disclosed, wherein circular patterns of different sizes may be formed using a single CP character, by varying dosage. A method for forming circular patterns on a surface using a variable shaped beam (VSB) charged particle beam writer is also disclosed, wherein the dosages of the shots may vary, and wherein the union of the shots is different than the set of target patterns. A method for forming circular patterns on a surface using a library of glyphs is also disclosed, wherein the glyphs are pre-calculated dosage maps that can be formed by one or more charged particle beam shots.

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