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Volume: 56 | Article ID: art00006
Lift-off Contact Separation Method for Rear Contact Solar Cells
  DOI :  10.2352/J.ImagingSci.Technol.2012.56.4.040505  Published OnlineDecember 2012

Abstract A method for isolating interdigitated metal contacts for rear contact solar cells using aerosol-printed polymer masking lines which can “lift off” overlying metal during a sonication step is described. Aluminum lift-off is demonstrated with masking lines formed by aerosol-printed novolac resin and polyacrylic acid. By printing novolac resin lines that are ∼10 μm high, lift-off of evaporated aluminum in an ultrasonic bath reliably resulted in 100 to 170 μm isolation gaps being formed between n-type and p-type rear contacts on different wafer surfaces. Performing this lift-off process using water-soluble polyacrylic acid lines may be advantageous due to the less expensive recovery of lift-off metal from the sonication bath.

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Zhongtian Li, David Cordiner, Nino Borojevic, John Rodriguez, Alison Lennon, "Lift-off Contact Separation Method for Rear Contact Solar Cellsin Journal of Imaging Science and Technology,  2012,  pp 40505-1 - 40505-6,

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Copyright © Society for Imaging Science and Technology 2012
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