Patent ID: 6621686
Filing Date: 2003-09-16
Classification: A61N,H01G

Abstract:
A layered aluminum electrolytic capacitor comprising:an anode layer having opposed major anode layer surfaces and an anode layer edge around the periphery of said opposed major surfaces, said anode layer formed of at least one thin metallic anode sheet etched to form certain pores extending part way through the anode sheet and certain through-etched tunnels extending all the way through the anode sheet thereby forming an etched anode sheet providing enhanced surface area, said etched anode sheet having first and second opposed major anode sheet surfaces bounded by an anode sheet edge and an anode sheet thickness, said anode sheet having a plurality of through-holes bored to extend between said first and second opposed major surfaces and through said anode sheet thickness of said etched anode sheet and an oxide layer overlying the exposed surfaces of the pores and through-holes; a cathode layer; a separator layer positioned between said anode layer and said cathode layer; and an electrolyte.