Method of manufacturing an electronic device and a...

Radiation imagery chemistry: process – composition – or product th – Registration or layout process other than color proofing

Reexamination Certificate

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C430S311000

Reexamination Certificate

active

06893785

ABSTRACT:
A method of manufacturing an electronic device, such as a high-speed semiconductor integrated circuit device, provides improved dimensional accuracy in transferring fine patterns. Photolithography for gate patterns and wiring patterns is carried out by exposing a halftone phase-shift mask having shade areas made of resist with an oblique illumination system, and photolithography for contact hole patterns is carried out by using a photomask having a metal shade film with metal alignment wafer marks.

REFERENCES:
patent: 5-181257 (1993-07-01), None
patent: 5-289307 (1993-11-01), None
patent: 9-211837 (1997-08-01), None

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