Vacuum roll coated security thin film interference products...

Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate

Reexamination Certificate

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Details

C427S209000, C427S210000, C427S211000, C427S258000, C427S259000, C427S536000, C427S537000, C427S538000, C428S209000

Reexamination Certificate

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07744964

ABSTRACT:
A method for forming an optically variable device upon a substrate comprises the steps of: patterning a reflective layer on the substrate using an oil-ablation technique; removing oil residue from the first side of the substrate using a first glow discharge; and depositing thin-film layers so as to be supported by the substrate to form the optically variable device. Optionally, oil residue is removed from the second side of the substrate using a second glow discharge.

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“Proceedings of the Fourteenth International Conference on Vacuum Web Coating” Oct. 25-27, 2000 by Aerre Machine.

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