Laser imageable tuned optical cavity thin film and printing plate incorporating the same
AssigneeFlex Products, Inc.
InventorsGregory F. Davis, Richard A. Bradley, Jr., Shari Powell Fisher, Roger W. Phillips
Life of this patent
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Abstract
A laser imageable tuned optical cavity thin film for use with a laser producing laser radiation at a laser wavelength comprising a flexible sheet of plastic having first and second surfaces serving as a film substrate. A thin film stack is disposed on the first surface of the film substrate and comprises a first vacuum-deposited metal layer carried by the first surface. It is also comprised of a dielectric layer deposited on the first metal layer. A second semi-opaque metal layer is vacuum deposited onto the dielectric layer. The thin film stack is tuned to provide maximum absorption at the laser wavelength.
Claims16
A laser imageable tuned optical cavity thin film for use with a laser producing laser radiation at a laser wavelength comprising a flexible sheet of an organic plastic having first and second surfaces serving as a film substrate and a thin film optical cavity stack disposed on the first surface of the film substrate, said thin film stack comprising a first vacuum-deposited metal layer carried by the first surface, a dielectric layer deposited on the first metal layer and a second vacuum-deposited semi-opaque metal layer deposited onto the dielectric layer, said thin film stack being tuned to provide maximum absorption at the laser wavelength.
A lithographic laser imageable printing plate for use with a laser producing laser energy at a laser wavelength comprising a base supporting substrate having a first surface and having a thickness ranging from 5 to 20 mils, an ablation film laminated to the first surface, said laser ablation film comprising a flexible sheet of organic plastic having first and second surfaces serving as a film substrate and a thin film optical cavity stack disposed on the first surface of the thin film substrate, said film optical cavity stack comprising a first vacuum-deposited metal layer carried by the first surface of the film substrate, a dielectric layer deposited on the first metal layer and a second vacuum-deposited metal layer deposited on the dielectric layer, said thin film optical cavity stack being tuned for maximum absorption at the laser wavelength.
Dependencies are inferred from the claim text.