Patent ID: 7520244
Filing Date: 2009-04-21
Classification: C23C,H01J

Abstract:
1. A plasma treatment apparatus for thin-film deposition comprising: a reactor chamber; a pair of parallel-plate electrodes disposed inside the chamber, between which a thin film is to be formed on a substrate; and a radio-frequency power supply system used for transmitting radio-frequency power to one of the parallel-plate electrodes via multiple supply points provided on the one of the parallel-plate electrodes, said radio-frequency power supply system comprises: said radio-frequency transmission unit comprising: an inlet transmission path and multiple branches branched off from the inlet transmission path, wherein each branch connected to the supply point of the parallel-electrode is multiple branchings downstream of the inlet transmission path and has a substantially equal characteristic impedance value, said multiple branchings including a first branching and a second branching downstream of the first branching; and wherein each branch comprises a hollow copper tube as an inductor, each inductance adjuster is a ferrite core which removably encircles the hollow copper tube to adjust an impedance value of the transmission system, the hollow copper tube of the second branching is smaller in diameter than the hollow copper tube of the first branching, and the ferrite core encircling the hollow copper tube of the second branching is smaller than the ferrite core encircling the hollow copper tube of the first branching.