Mixed conductive power and use thereof
AssigneeHitachi Chemical Company, Ltd.
InventorHideji Kuwajima
Life of this patent
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Abstract
There are disclosed a highly packed, mixed conductive powder with a relative packing density of at least 68%, a process for producing the same, a conductive paste using the mixed conductive powder and a process for producing the same, as well as a sheet and a sheet with attached film using the mixed conductive powder. This mixed conductive powder comprises substantially monodispersed conductive scale-like particles (A1) and conductive substantially spherical particles (B1). Or, this mixed conductive powder comprises substantially monodispersed, conductive, substantially spherical particles (A2) and conductive substantially spherical particles (B2) with a smaller particle diameter than that of the substantially spherical particles (A2).
Claims33
A mixed conductive powder, comprising substantially monodispersed conductive scale-like particles (A1) and conductive substantially spherical particles (B1), and with a relative packing density of at least 68%.
A mixed conductive powder, comprising substantially monodispersed, conductive, substantially spherical particles (A2), and conductive substantially spherical particles (B2) with a smaller particle diameter than that of the substantially spherical particles (A2), and with a relative packing density of at least 68%.
A process for producing a mixed conductive powder comprising:
- preparing substantially monodispersed conductive particles (A), and aggregated conductive particles (B);
- and
- mixing the particles (A) and the particles (B) so that an impact of the particles (A) on the particles (B) causes the aggregated particles (B) to disaggregate, allowing the particles (A) and the particles (B) to disperse and mix.
and 14. (canceled)
A conductive paste comprising a mixed conductive powder with a relative packing density of at least 68% and a resin binder, wherein the mixed conductive powder comprises from 60 to 96% by weight of a substantially spherical silver-coated copper powder that has undergone surface smoothing, and from 4 to 40% by weight of silver powder, and the silver-coated copper powder is a substantially spherical, fatty acid-adhered, silver-coated copper powder in which a surface of the copper is partially coated with silver and silver-copper alloy, a total quantity of silver is from 3 to 30% by weight relative to the copper, and a quantity of fatty acid equivalent to 0.02 to 1.0% by weight relative to the silver-coated copper powder is adhered to a surface of the silver-coated copper powder.
(canceled)
-42. (canceled)
Dependencies are inferred from the claim text.