Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Radiation mask
Reexamination Certificate
2007-03-27
2007-03-27
Rosasco, S. (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Radiation mask
Reexamination Certificate
active
10405505
ABSTRACT:
A spin-coating method according to the present invention includes a uniforming step of rotating a substrate at a predetermined main rotation speed for a predetermined main rotation time so as to primarily make a resist film thickness uniform, and a subsequent drying step of rotating the substrate at a predetermined drying rotation speed for a predetermined drying rotation time so as to primarily dry the uniform resist film. In the present invention, a contour map, for example, of film thickness uniformity within an effective region (critical area) shown in FIG.3A is determined (generated), and resist-coating is performed by selecting a condition within the optimum region in this contour map in which the film thickness uniformity (within an effective region) can be the maximum, or within the region in which the film thickness uniformity (within an effective region) can be high enough for a desirably specified.
REFERENCES:
patent: 6162565 (2000-12-01), Chao et al.
patent: 6635393 (2003-10-01), Pierrat
patent: 6855463 (2005-02-01), Lassiter et al.
patent: 4-29215 (1992-05-01), None
Higuchi Takao
Kobayashi Hideo
Hoya Corporation
Rosasco S.
Sughrue & Mion, PLLC
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