Abstract: A discharge electrode E in an electrode chamber C comprises a plurality of electrode members 8, 9. The electrode members 8, 9 are disposed facing each other by having a supporting member 4 therebetween, a gap is formed between the facing portions of the electrode members 8, 9, and by having the gap as a gas passageway 15, the gas passageway is opened in the leading end of the discharge electrode. A replacement gas having been supplied from a manifold pipe 3 is supplied to the gas passageway 15 via an orifice.

Abstract: Surface modification device forms a discharge area E1 between a discharge electrode 6 and a counter electrode 4, supplies substitution gas to the discharge area E1, and modifies the surface of the base material to be processed. The surface modification device comprises; a slit-shaped substitution gas passage; and cover members 7, 8 that form curtain passages 22, 23 in spaces facing the discharge electrode. While the substitution gas is being supplied to the discharge area E1, gas injected from the curtain passages 22, 23 prevent the inflow of an entrained flow a and the outflows b1, b2 of the substitution gas, thereby maintaining the concentration of substitution gas inside the discharge area E1.

Abstract: Surface modification device forms a discharge area E1 between a discharge electrode 6 and a counter electrode 4, supplies substitution gas to the discharge area E1, and modifies the surface of the base material to be processed. The surface modification device comprises; a slit-shaped substitution gas passage; and cover members 7, 8 that form curtain passages 22, 23 in spaces facing the discharge electrode. While the substitution gas is being supplied to the discharge area E1, gas injected from the curtain passages 22, 23 prevent the inflow of an entrained flow a and the outflows b1, b2 of the substitution gas, thereby maintaining the concentration of substitution gas inside the discharge area E1.

Abstract: A discharge electrode E in an electrode chamber C comprises a plurality of electrode members 8, 9. The electrode members 8, 9 are disposed facing each other by having a supporting member 4 therebetween, a gap is formed between the facing portions of the electrode members 8, 9, and by having the gap as a gas passageway 15, the gas passageway is opened in the leading end of the discharge electrode. A replacement gas having been supplied from a manifold pipe 3 is supplied to the gas passageway 15 via an orifice.

Abstract: A controlling apparatus for a high frequency high voltage power source is disclosed which eliminates a switching loss of a high frequency invertor and allows adjustment of the output power to be performed continuously and accurately over a wide range. A resonance current of a resonance circuit of the high frequency high voltage power source is detected by current detection means, and a phase locked loop circuit locks itself with a frequency with which it coincides in phase with the resonance current to produce a synchronized pulse signal. From the pulse signal, a signal having a zero voltage outputting period of a preset duration is formed by a pulse density modulation circuit to change the pattern of a gate signal for switching semiconductor elements of a high frequency invertor to adjust the output power.