Solid electrolytic capacitor including an exterior body that covers a capacitor element and method of manufacturing the same

1. A solid electrolytic capacitor comprising:

a capacitor element that has

an anode body,

a dielectric oxide film layer covering the anode body, and

a cathode body formed on the dielectric oxide film layer;

an exterior body that covers the capacitor element;

a contact layer bonded only to an anode terminal portion that is an end portion of the anode body, and has a surface with a predetermined surface roughness; and

an anode-side electrode layer that covers the surface of the contact layer, wherein:

at least part of the anode terminal portion protrudes from the exterior body and penetrates into the anode-side electrode layer, and

a material of the anode-side electrode layer is a conductive resin material having first metal particles mixed in a resin material.

2. The solid electrolytic capacitor of claim 1 , wherein

the predetermined surface roughness is 3 μm or more.

3. The solid electrolytic capacitor of claim 1 , wherein

a cross-sectional shape of the surface of the contact layer in a thickness direction of the anode body has a projection shape or a substantially linear shape at a central portion.

4. The solid electrolytic capacitor of claim 1 , wherein

the contact layer is a metal film formed by accumulating second metal particles on the anode terminal portion.

5. The solid electrolytic capacitor of claim 4 , wherein

the second metal particles are spherical or substantially spherical.

6. The solid electrolytic capacitor of claim 4 , wherein

the contact layer and the anode terminal portion are metal-bonded to each other.

7. The solid electrolytic capacitor of claim 1 , wherein

the contact layer includes a metal having a lower ionization tendency than that of the anode body.