Abstract
A circular planar magnetron sputtering source has been combined with an electron-cyclotron resonance (ECR) plasma source to reduce the operating voltage of the magnetron in order to avoid high-energetic particle bombardment of sensitive thin films during deposition. Although the ECR source produces a downstream plasma density of several 1010 cm-3, the voltage reduction of the magnetron is limited to only a few percent. Using a geometry with the ECR source facing the magnetron target for maximum coupling, the shape of the discharge clearly shows a magnetic shielding of the magnetron against the ECR discharge limiting the electron injection into the magnetron torus.
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