Patent ID: 7616430

Claim:
A capacitor electrode member comprising: aluminum material ( 1 ); a carbon-containing layer ( 2 ) formed on the surface of said aluminum material ( 1 ); and an interposition layer ( 3 ) containing an aluminum element and a carbon element, the interposition layer being formed between said aluminum material ( 1 ) and said carbon-containing layer ( 2 ), wherein; said interposition layer ( 3 ) includes a first surface portion ( 3 ) which is formed on at least a part of the region of the surface of said aluminum material ( 1 ) and contains a carbide of aluminum; said carbon-containing layer ( 2 ) includes a second surface portion ( 21 ) formed so as to extend outward from said first surface portion ( 3 ); and said carbon-containing layer ( 2 ) further includes carbon particles ( 22 ) and said second surface portion ( 21 ) is formed between said first surface portion ( 3 ) and said carbon particles ( 22 ) and contains a carbide of aluminum.