Conductive paste for large greensheet screening including high t

Details Conductive paste for large greensheet screening including high t Conductive paste for large greensheet screening including high t

1998-03-06

1999-09-14

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

Free metal containing

252500, H01B 120, H01B 122

Patent

active

059519177

ABSTRACT:
Deformation of vias and shorting between vias during screening of conductive paste onto greensheets wider than 185 mm is avoided by a concentration of thixotropic agent in the conductive paste formulation to a concentration which raises the thixotropic index of the paste to within 5% to 25% of the maximum achievable thixotropic index for the organic vehicle in the paste. For a paste containing molybdenum powder in which the organic vehicle is a mixture of ethyl cellulose, texanol and oleoyl sarcosine, this criterion corresponds to a concentration of glycerl tri(-12-hydroxystearate) in the range of 1.4% to 1.8% by weight.

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patent: 5236630 (1993-08-01), Arima et al.
patent: 5503777 (1996-04-01), Itagaki et al.

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