Thick-film pastes containing lead-tellurium-boron-oxides, and their use in the manufacture of semiconductor devices

  • US 8,895,843 B2
  • Filed: 05/04/2011
  • Issued: 11/25/2014
  • Est. Priority Date: 05/04/2010
  • Status: Active Grant
First Claim
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1. A thick-film paste composition for use in forming an electrical connection in a photovoltaic device comprising a semiconductor substrate having at least one insulating layer on a main surface thereof, the composition comprising:

  • a) 85 to 99.5% by weight of an electrically conductive metal or derivative thereof, based on total solids in the composition;

    b) 0.5 to 15% by weight, based on total solids in the composition, of a lead-tellurium-boron-oxide, wherein the lead-tellurium-boron-oxide comprises 0.25 to 5 wt % B2O3; and

    c) an organic medium;

    wherein the thick-film paste, when fired, is capable of penetrating the at least one insulating layer.

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