Process and structures for fabrication of solar cells
US11437528B2 · kind B2 · utility
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22Claims
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Key dates
| Filing date | Feb 18, 2020 |
| Grant date | Sep 6, 2022 |
| Priority date | — |
| Expiry date | Feb 22, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
Abstract
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.
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