International Business Machines Corporation

Charles W Hunter, Jr

Jawahar P Nayak

Michael E Cropp

John M Wargo

Nancy A Wier-Cavalieri

Ronald J Consaga

Rodney E Turk

Donald Reid

Richard A Heath

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.

Conductive paste for large greensheet screening including high

Apparatus for pressurizing a paste for dispensing the paste includes a vessel, a follower plate and a resilient seal which is movable through the vessel with the follower plate. The resiliency of the seal provides pressure for developing a seal between the seal and the vessel, and pressurized paste provides additional pressure for developing the seal.

Viscous fluid pressurizing apparatus

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New Windsor, NY, United States of America

Charles W Hunter, Jr