Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Radiation mask
Reexamination Certificate
2005-10-07
2009-08-25
Huff, Mark F (Department: 1795)
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Radiation mask
Reexamination Certificate
active
07579121
ABSTRACT:
An optical proximity correction photomask comprises a transparent substrate, a main feature having a first transmitivity disposed on the transparent substrate and at least one assist feature having a second transmitivity disposed to each side of the main feature and on the transparent substrate, wherein the first transmitivity is not equal to the second transmitivity.
REFERENCES:
patent: 5786113 (1998-07-01), Hashimoto et al.
patent: 5821014 (1998-10-01), Chen et al.
Huff Mark F
Ruggles John
Taiwan Semiconductor Manufacturing Co. Ltd.
Thomas Kayden Horstemeyer & Risley
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