Patent ID: 6618238
Filing Date: 2003-09-09
Classification: H05K

Abstract:
An intermediate capacitor foil which comprises a multi-layered body having:a) a conductive copper foil having an exposed surface; b) a bonding layer comprising a polymeric layer and having a thickness in the range of from about 0.0005 to about 0.001 inches, and having an unbonded surface; and c) a partially-cured, filled, epoxy resin joined to and between (a) the conductive copper foil at a surface opposite the exposed surface and (b) the bonding layer at a surface opposite the unbonded surface, the resin being loaded with a filler comprising ceramic particles having a high dielectric constant, wherein the filled resin forms a dielectric layer having a thickness in the range of about 0.0005 to about 0.003 inches, wherein the bonding layer is: unfilled; less-highly filled than the partially-cured, filled epoxy resin; or relatively uncured.