Patent ID: 9605340
Date: 2017-03-28
CPC Classifications: C23C,H01J

Claim:
1. A method of forming hydrogenated diamond-like carbon (DLC) film over a substrate, comprising: providing a process chamber and a plasma cage positioned outside the process chamber; affixing carbon sputtering targets onto two cathodes inside the plasma cage, such that the two sputtering targets face each other; evacuating the process chamber; injecting into the plasma cage process gasses of argon and hydrogen; igniting and sustaining plasma by applying power to the two cathodes and confining the plasma inside the plasma cage; transporting the substrate inside the process chamber without applying any electrical bias to the substrate; and, providing a path for particles sputtered from the sputtering target to reach the substrate inside the process chamber; wherein applying power to the two cathodes comprises applying a DC power at power density of about 30-770 W per square inch of the targets so as to form an optically transparent hydrogenated diamond-like carbon film coating that is transparent to visible spectrum and is clear having no perceptible tint.