Tiled solar cell laser process

US10347788B2 · kind B2 · utility

Assignee

• Solaria Corporation · US

Inventors

• Kevin R. Gibson · Redwood City, US
• Aureo Parilla · Fremont, US
• Thomas Phu · Alameda, US

Key dates

• Filing date: Jun 13, 2017
• Grant date: Jul 9, 2019
• Expiry date: Dec 22, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/50

Abstract

In an example, the present invention provides a method of separating a photovoltaic strip from a solar cell. The method includes providing a solar cell, placing the front side of the solar cell on a platen such that the backside is facing a laser source, initiating a laser source to output a laser beam having a wavelength from 200 to 600 nanometers and a spot size of 18 to 30 microns, subjecting a portion of the backside to the laser beam at a power level ranging from about 20 Watts to about 35 Watts to cause an ablation to form a scribe region having a depth, width, and a length, the depth being from 40% to 60% of a thickness of the solar cell, the width being between 16 and 35 microns to create a plurality of scribe regions spatially disposed on the backside of the solar cell.