THICK-FILM PASTES CONTAINING LEAD- AND TELLURIUM-OXIDES, AND THEIR USE IN THE MANUFACTURE OF SEMICONDUCTOR DEVICES
First Claim
Patent Images
1. A thick-film paste 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 solids of a lead-tellurium-oxide, wherein the mole ratio of lead to tellurium of the lead-tellurium-oxide is between 5/95 and 95/5; and
c) an organic medium.
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Abstract
The present invention provides a thick-film paste for printing the front-side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-oxide dispersed in an organic medium.
23 Citations
14 Claims
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1. A thick-film paste composition comprising:
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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 solids of a lead-tellurium-oxide, wherein the mole ratio of lead to tellurium of the lead-tellurium-oxide is between 5/95 and 95/5; and c) an organic medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process comprising:
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(a) providing a semiconductor substrate comprising one or more insulating films deposited onto at least one surface of a semiconductor substrate; (b) applying a thick-film paste composition onto at least a portion of the insulating film to form a layered structure, wherein the thick-film paste composition comprises; i) 85 to 99.5% by weight of an electrically conductive metal or derivative thereof, based on total solids in the composition; ii) 0.5 to 15% by weight based on solids of a lead-tellurium-oxide, wherein the mole ratio of lead to tellurium of the lead-tellurium-oxide is between 5/95 and 95/5; and iii) an organic medium; and (c) firing the semiconductor substrate, one or more insulating films, and thick-film paste, forming an electrode in contact with the one or more insulating layers and in electrical contact with the semiconductor substrate. - View Dependent Claims (10, 11)
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12. An article comprising:
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a) a semiconductor substrate; b) one or more insulating layers on the semiconductor substrate; and c) an electrode in contact with the one or more insulating layers and in electrical contact with the semiconductor substrate, the electrode comprising an electrically conductive metal and lead-tellurium-oxide. - View Dependent Claims (13, 14)
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Specification