Laser film debonding method
First Claim
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1. A method of removing a transparent protective surface film from a substrate comprising a first material, the method comprising:
- a. transmitting a laser light at a wavelength to transmit through the transparent protective surface film and to be absorbed at an underlying and separately applied bonding layer, wherein the underlying bonding layer adheres the protective surface film to the substrate, and wherein the protective surface film comprises a second material different from the first material;
b. absorbing the laser light at the bonding at the layer, wherein the bonding layer comprises a third material different from the first material and the second material,wherein as the laser light is absorbed at the bonding layer, the transparent protective surface film is released; and
c. discarding the transparent protective surface film.
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Abstract
A laser-based coating removal method debonds a film from a substrate rather than ablating the film. A laser light is transmitted through a transparent film to an underlying bonding layer for bonding the film to one or more additional films and/or a substrate. The laser light is absorbed at the bonding layer and the transparent film is released. In some embodiments, after the transparent film is released it is able to be physically removed.
193 Citations
34 Claims
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1. A method of removing a transparent protective surface film from a substrate comprising a first material, the method comprising:
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a. transmitting a laser light at a wavelength to transmit through the transparent protective surface film and to be absorbed at an underlying and separately applied bonding layer, wherein the underlying bonding layer adheres the protective surface film to the substrate, and wherein the protective surface film comprises a second material different from the first material; b. absorbing the laser light at the bonding at the layer, wherein the bonding layer comprises a third material different from the first material and the second material, wherein as the laser light is absorbed at the bonding layer, the transparent protective surface film is released; and c. discarding the transparent protective surface film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of removing a protective film from a substrate comprising:
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a. transmitting a laser light at a wavelength to transmit through a first film layer to a second film layer above the substrate and to be absorbed at an adhering interface between the first film layer and the second film layer wherein the first film layer and the second film layer comprise a first same material and the adhering interface comprises a second material different from the first material; and b. absorbing the laser light at the adhering interface between the first film layer and the second film layer, wherein as the laser light is absorbed at the interface, the first film and the second film are debonded. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of removing one or more protective films from a substrate comprising:
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a. transmitting a laser light at a wavelength to transmit through one or more than one transparent films and to be absorbed at an adhering interface between a last film above the substrate and a second to last film wherein the last film and the second to last film comprise a first same material and the adhering interface comprises a second material different from the first material; and b. absorbing the laser light at the adhering interface between the last film above the substrate and the second to last film, wherein as the laser light is absorbed at the interface, the last film and the second to the last film are debonded. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A laser-based coating removal system to remove a protective surface coating from a surface, wherein the surface comprises a first material, the system comprising:
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a. a laser source configured to provide a laser pulse; b. a laser scanning head coupled to the laser source and configured to direct the laser pulse onto a position on the surface, wherein the laser pulse is configured with a wavelength such that the laser pulse passes through one or more transparent protective surface films and is absorbed at an underlying and separately applied bonding layer, wherein the underlying bonding layer adheres the protective surface film to the surface, and wherein the one or more transparent protective surface films comprise a second material different from the first material and the bonding layer comprises a third material different from the first material and the second material, and wherein as the laser light is absorbed at the bonding layer, the one or more transparent protective surface films are released. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification