Meaning
Thin film deposition process that uses a high-energy stream of ions to knock atoms off a target material for collection on a substrate. Dense and extremely stable coatings with very low optical absorption and scattering losses are created by ion beam sputtering. These layers are common in the manufacture of high-reflectivity mirrors and narrow-band filters for laser applications.
Deposition Kinetic
Noble gas ions like argon are accelerated toward the target within a vacuum chamber. When the ions strike, the transferred momentum ejects target atoms with high kinetic energy, which then migrate across the substrate surface to form a compact layer. Ion beam sputtering allows for precise control over the energy and flux of the material, ensuring that the atoms pack together without the voids found in thermal evaporation.
This energetic deposition results in films that match the density of the bulk material.
Film Quality
Adhesion is exceptional due to the energy of the arriving atoms.
Scaling Capability
Transitioning from a small research chamber to a large production system involves managing the uniformity of the ion plume over a wider area. If the uniformity is not verified during the pilot phase, the center and edges of the coating run will vary in thickness. Regular audits of the deposition rate and planetary rotation speed are required to maintain a high production yield of conforming parts.
