Metal paste, process for producing same and method of making a m

Details Metal paste, process for producing same and method of making a m Metal paste, process for producing same and method of making a m

1991-03-29

1996-12-24

Einsmann, Margaret V.

Compositions

Electrically conductive or emissive compositions

Free metal containing

252513, 252309, H01B 102

Patent

active

055871119

ABSTRACT:
A metal paste comprising ultrafine particles of a metal. The particles have a particle size of 1000 angstroms (0.1 micron) or less and are individually uniformly dispersed in an organic solvent.
A process for producing a metal paste comprises the steps of evaporating a metal in a vacuum chamber in an atmosphere of an inert gas at a pressure of 10 Torr or less and of collecting the vapor of the evaporated metal on a cooling surface in the form of ultrafine particles having a particle size of 1000 angstroms (0.1 micron) or less, wherein a vapor of an organic solvent is introduced into the vacuum chamber while the metal is being evaporated.
A method for preparing a metallic thin film having a thickness of between 0.01 micron and 1 micron. A metal paste containing ultrafine metal particles having a diameter of 0.1 micron or less uniformly dispersed in an organic solvent is coated on a substrate, dried and sintered.

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"Production of Ultrafine Gold and Silver particles by a gas evaporation and solvent trap technique" Saito et al, *1988 (CA109:177241) no month available.
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