Laser-induced backside annealing using fluid absorber
First Claim
1. A method of applying a film to a substrate, comprising:
- applying a coating material to a backside of a substrate;
placing a liquid absorber material in heat transfer proximity to a backside of the substrate;
using a laser to heat the liquid absorber material by transmitting the laser beam first through the substrate and then through the coating material to supply optical energy to the liquid absorber material; and
using the heat from the liquid absorber material to alter the physical properties of the coating material such that the coating material forms a film adhered to the substrate.
1 Assignment
0 Petitions
Accused Products
Abstract
A coating material containing metal oxide is applied to one side of a substrate, both coating and substrate being transparent to visible light. An absorber material is placed in heat transfer proximity to the coating and a laser beam is transmitted through the substrate and through the coating to strike the absorber material at the interface between coating and absorber. The absorber material absorbs optical energy from the laser beam causing the material to heat. Heat from the absorber propagates to the coating to heat a localized region, causing the coating material to anneal. If desired, the coating material can include a doping material that fuses into the coating during annealing.
4 Citations
25 Claims
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1. A method of applying a film to a substrate, comprising:
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applying a coating material to a backside of a substrate; placing a liquid absorber material in heat transfer proximity to a backside of the substrate; using a laser to heat the liquid absorber material by transmitting the laser beam first through the substrate and then through the coating material to supply optical energy to the liquid absorber material; and using the heat from the liquid absorber material to alter the physical properties of the coating material such that the coating material forms a film adhered to the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of applying a thin film to a substrate, comprising:
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employing a laser that provides a laser beam at a predetermined wavelength that is substantially transmissive through said substrate; selecting a coating material that is substantially transmissive at said predetermined wavelength and applying said coating material to said substrate to define a coated surface; associating a containment vessel with the coated surface to define a fluid containment chamber that includes within its interior at least a portion of the coated surface; selecting a fluid absorber material that is substantially absorptive at said predetermined wavelength and introducing said fluid absorber material into said containment chamber so that the fluid absorber material contacts said portion of the coated surface; transmitting said laser beam through the substrate and also through the coating material to strike the fluid absorber material in a region substantially adjacent an interface between the fluid absorber material and coating material and thereby supply optical energy to the fluid absorber material causing the fluid absorber material to gain heat in the region where struck by the beam; and allowing heat from said fluid absorber material to propagate to a localized region of coating material adjacent said interface in a quantity sufficient to anneal the coating material in the localized region.
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Specification