Coating processes – Direct application of electrical – magnetic – wave – or... – Pretreatment of substrate or post-treatment of coated substrate
Patent
1992-12-11
1995-10-10
Padgett, Marianne
Coating processes
Direct application of electrical, magnetic, wave, or...
Pretreatment of substrate or post-treatment of coated substrate
21912169, B05D 306, B23K 2600
Patent
active
054569559
ABSTRACT:
This invention concerns a novel structure for an illuminated display and unique method for forming illuminated displays. This structure of the display includes a substrate on which are deposited one or more light transmissive layers and an over coating of a light absorptive material. A clear separation layer is also disposed between the light transmissive layers and the light absorptive layers. The novel fabrication process of the present invention includes the use of a NdYAG laser to etch indicia in the light absorptive layer. The NdYAG laser may be operated in either a continuous or pulsed mode at power levels below approximately eight watts and at a rate of travel of about six inches per second. In one preferred embodiment indicia etching is performed operating the NdYAG laser in a pulsed mode and the pattern of indicia is retraced operating the laser in a lower power continuous mode to remove potential residue from etched regions of the light absorptive layer.
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Illuminated Display Division of Bell Industries, Inc.
Padgett Marianne
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