Solar cell manufacturing method, involves providing semiconductor substrate with pn-junction formed in it and removing dielectric layer in local areas by ultra short pulse laser with laser pulse duration of less than hundred picoseconds

摘要

The method involves providing a semiconductor substrate with a pn-junction formed in it. The dielectric layer is removed in local areas by an ultra short pulse laser with a laser pulse duration of less than 100 picoseconds, particularly less than 50 picoseconds and stronger prefers less than 20 picoseconds.