Patent ID: 8607732

Claim:
An in-liquid plasma film-forming apparatus being characterized in that it has; a vessel being capable of accommodating a substrate and a liquid including raw material therein; an electrode for in-liquid plasma, the electrode being disposed in the vessel; an electric power device for supplying electricity to the electrode for in-liquid plasma; and said electrode for in-liquid plasma is equipped with: a rod-shaped main electrode having a discharging end that contacts with said liquid, and exhibiting electric conductivity; an auxiliary electrode contacting with said liquid, being disposed more adjacently to a side of said discharging end than a position at which said substrate is disposed when taking a position of the discharging end as the standard, and facing the discharging end, the auxiliary electrode exhibiting electric conductivity; and a plasma generating unit having a space that is demarcated by a surface of said discharging end and a surface of said auxiliary electrode facing the surface, and being for generating plasma that comprises said raw material inside bubbles, which are formed in the space, by means of electricity being supplied to said main electrode; wherein said main electrode is disposed in such a manner that said discharging end is opposite to said substrate; said auxiliary electrode is disposed between said substrate and said main electrode; at least a part of a surface of said auxiliary electrode and at least a part of said discharging end overlap in an axial direction extending from said main electrode through said space; and wherein the bubbles including said plasma that is generated at said plasma generating unit are contacted with said substrate, thereby depositing a decomposed component of the raw material onto a surface of the substrate.