| Patent application number | Description | Published |
|---|
| 20110126898 | SOLAR CELL CONTACT FORMATION USING LASER ABLATION - The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes. | 06-02-2011 |
| 20110300665 | Ablation Of Film Stacks In Solar Cell Fabrication Processes - A dielectric film stack of a solar cell is ablated using a laser. The dielectric film stack includes a layer that is absorptive in a wavelength of operation of the laser source. The laser source, which fires laser pulses at a pulse repetition rate, is configured to ablate the film stack to expose an underlying layer of material. The laser source may be configured to fire a burst of two laser pulses or a single temporally asymmetric laser pulse within a single pulse repetition to achieve complete ablation in a single step. | 12-08-2011 |
| 20120003788 | High Throughput Solar Cell Ablation System - A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source. | 01-05-2012 |
| 20120204926 | PROCESS AND STRUCTURES FOR FABRICATION OF SOLAR CELLS - Contact holes of solar cells are formed by laser ablation to accommodate various solar cell designs. Use of a laser to form the contact holes is facilitated by replacing films formed on the diffusion regions with a film that has substantially uniform thickness. Contact holes may be formed to deep diffusion regions to increase the laser ablation process margins. The laser configuration may be tailored to form contact holes through dielectric films of varying thicknesses. | 08-16-2012 |
| 20120312791 | HIGH THROUGHPUT SOLAR CELL ABLATION SYSTEM - A solar cell is formed using a solar cell ablation system. The ablation system includes a single laser source and several laser scanners. The laser scanners include a master laser scanner, with the rest of the laser scanners being slaved to the master laser scanner. A laser beam from the laser source is split into several laser beams, with the laser beams being scanned onto corresponding wafers using the laser scanners in accordance with one or more patterns. The laser beams may be scanned on the wafers using the same or different power levels of the laser source. | 12-13-2012 |
| 20130065357 | SOLAR CELL CONTACT FORMATION USING LASER ABLATION - The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes. | 03-14-2013 |
| 20130196464 | LASER SYSTEM WITH MULTIPLE LASER PULSES FOR FABRICATION OF SOLAR CELLS - A laser system with multiple laser pulses for removing material from a solar cell being fabricated. The laser system includes a single pulse laser source and a multi-pulse generator. The multi-pulse generator receives a single pulse laser beam from the single pulse laser source and converts the single pulse laser beam into a multi-pulse laser beam. A laser scanner scans the multi-pulse laser beam onto the solar cell to remove material from the solar cell. | 08-01-2013 |
| 20140096824 | PROCESS AND STRUCTURES FOR FABRICATION OF SOLAR CELLS - Contact holes of solar cells are formed by laser ablation to accommodate various solar cell designs. Use of a laser to form the contact holes is facilitated by replacing films formed on the diffusion regions with a film that has substantially uniform thickness. Contact holes may be formed to deep diffusion regions to increase the laser ablation process margins. The laser configuration may be tailored to form contact holes through dielectric films of varying thicknesses. | 04-10-2014 |
| 20140134787 | SOLAR CELL CONTACT FORMATION USING LASER ABLATION - The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes. | 05-15-2014 |
| 20140174519 | METAL-FOIL-ASSISTED FABRICATION OF THIN-SILICON SOLAR CELL - One embodiment relates to a method of fabricating a solar cell. A silicon lamina is cleaved from the silicon substrate. The backside of the silicon lamina includes the P-type and N-type doped regions. A metal foil is attached to the backside of the silicon lamina. The metal foil may be used advantageously as a built-in carrier for handling the silicon lamina during processing of a frontside of the silicon lamina. Another embodiment relates to a solar cell that includes a silicon lamina having P-type and N-type doped regions on the backside. A metal foil is adhered to the backside of the lamina, and there are contacts formed between the metal foil and the doped regions. Other embodiments, aspects and features are also disclosed. | 06-26-2014 |
| 20140326308 | SOLAR CELL CONTACT FORMATION USING LASER ABLATION - The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes. | 11-06-2014 |
