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Why Picosecond Laser Micromachining Is The Preferred Choice For Clean Cutting - Patterning Of Solar Cells & Other Sensitive Materials

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Laserod Wafer

From their inception, lasers have been used in a wide range of material micromachining & have changed our lives entirely in many respects. Laser micromachining is used in microelectronics, aerospace, medical, solar cells, transducer sensors, display sectors, and many more. Lasers have an accuracy that was historically unavailable, even by the most knowledgeable professionals. In high-tech industries, the relentless speed of innovation has resulted in ultrafast picosecond lasers, which have become a useful resource, particularly for high-precision applications.

This is because of the unique operating procedure of this form of laser, which allows patterning and clean cutting of sensitive materials and thin films used in many devices and micromachining of delicate materials such as glass. Laser micromachining replaces conventional cutting and drilling methods in many applications, reducing the use of other elements.

Micromachining of solar cells

Solar cell producers are working to achieve grid power cost parity in two ways: reduce the cost of cells and improve the efficiency of cell light conversions. Most solar cells are currently based on silicon wafers. One way to improve these crystalline silicon solar cells' performance is to use a backside passivation layer to reduce recombination losses.

Holes must be drilled via the passivation layer to allow electrical contacts to the cell. This must be achieved with minimal damage to the underlying crystalline silicon to maximize the cell output and ensure good ohmic contact for the current collection. For this purpose, picosecond laser micromachining offers a low cost, 'direct-write' alternative to photolithography. Picosecond lasers reduce the use of bulk chemical products.

In particular, studies have found that pulses of 355 nm picosecond deliver selective removal of the dielectric layers with minimum to no impact to the underlying silicon, allowing the formation of highly efficient solar cells based on selective emitters.

Laserod Technologies is one of the industries commanding experts in laser micromachining of polymers & other substrates for microscale applications. Our high pulse femtosecond and picosecond laser micromachining are uniquely suited for microscale-polymer machining for many applications. For all kinds of grooving, slotting, or scribing thin materials, metals and polymers, contact Laserod today at 1-888-991-9916 / 1-310-340-1343 for projects and inquiries!

 

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