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US 12,751,107 B2Granted
Photovoltaic devices with narrow scribes and methods and systems for forming the same
AssigneeFirst Solar, Inc.
InventorsNikhil Bhandari, Charles Wickersham
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Abstract
According to the embodiments provided herein, a method for scribing a layer stack of a photovoltaic device can include directing a laser scribing waveform to a film side of a layer stack. The laser scribing waveform can include pulse groupings that repeat at a group repetition period of greater than or equal to 1.5 μs. Each pulse of the pulse groupings can have a pulse width of less than or equal to 900 fs.
Claims17
A method for scribing a layer stack of a photovoltaic device comprising:
- directing a laser scribing waveform to a film side of a layer stack, whereby a scribe is formed through one or more scribed layers of the layer stack, and wherein:
- the laser scribing waveform comprises pulse groupings that repeat at a group repetition period of greater than or equal to 1.5 μs,
- each of the pulse groupings comprises two or more pulses that repeat at a pulse repetition period of less than or equal to 100 ns,
- each of the two or more pulses have a pulse width of less than or equal to 900 fs, and
- the layer stack includes a substrate and one or more intervening layers disposed between the one or more scribed layers and the substrate, and wherein the scribe is formed without traversing the one or more intervening layers.
2 more elements
Dependencies are inferred from the claim text.