Method for a Tube Inner Surface Coating

There are applications where the deposition of a coating must be applied on the inner surface of a tube part. In this paper, we describe a method for deposition of coatings on a tube inner wall. The coating method is based on ion beam sputtering, which is a well-established technology that enables the precise control of coating composition, thickness, and uniformity. This technique also offers the opportunity to deposit coatings selectively on desired locations using shadow masking. As an example, a study of Au and Al thin films is presented.