Patent ID: 8940140
Filing Date: 2015-01-27
Classification: C23C

Abstract:
1. A system for coating an inside surface of a vessel having an inner diameter less than 15 millimeters, the system consisting of comprising: a. an alternating current power supply generating an alternating current; b. a cathode having a first longitudinal axis substantially parallel to a longest length of the vessel and having an interior channel formed therein which runs coaxially with the first longitudinal axis of the cathode, wherein the interior channel is adapted to receive a coolant, and an anode having a second longitudinal axis substantially parallel to the longest length of the vessel and having an interior channel formed therein which runs coaxially with the second longitudinal axis of the anode, wherein the first longitudinal axis of the cathode is different from and parallel to the second longitudinal axis of the anode and wherein a gap separates the cathode from the anode and the cathode and the anode are in electrical communication with the alternating current power supply and wherein the alternating current is applied to the cathode and anode, wherein the cathode and anode are adapted to be substantially entirely received and substantially centered within the vessel; and c. means for maintaining the inside surface of the vessel in a controlled atmosphere wherein the alternating current is applied to the cathode and anode to sputter material from the cathode and anode to coat the inside surface of the vessel.