Abstract: A low inductance large area coil (LILAC) is provided as a source for generating a large area plasma. The LILAC comprises at least two windings which, when connected to an RF source via impedance matching circuitry, produce a circulating flow of electrons to cause a magnetic field in the plasma. Because the LILAC employs multiple windings, few turns of winding are required to obtain a large area coil, so that the inductance of the LILAC is low. The low inductance of the LILAC ensures that the self-resonating frequency of the LILAC is kept at a level far above the RF driving frequency, allowing a broad frequency range for impedance matching. Thus, there is no difficulty in impedance matching, and power transfer can be maximized, permitting efficient generation of a large area plasma.

Abstract: A low inductance large area coil (LILAC) is provided as a source for generating a large area plasma. The LILAC comprises at least two windings which, when connected to an RF source via impedance matching circuitry, produce a circulating flow of electrons to cause a magnetic field in the plasma. Because the LILAC employs multiple windings, few turns of winding are required to obtain a large area coil, so that the inductance of the LILAC is low. The low inductance of the LILAC ensures that the self-resonating frequency of the LILAC is kept at a level far above the RF driving frequency, allowing a broad frequency range for impedance matching. Thus, there is no difficulty in impedance matching, and power transfer can be maximized, permitting efficient generation of a large area plasma.

Abstract: A segmented transformer coupled plasma (TCP) coil is provided as a source for generating a uniform plasma in a plasma reactor. The segmented TCP is divided into two or more segment coils which, when connected to an RF source, produces a circulating flow of electrons to cause a magnetic field in the plasma. Because the segmented TCP employs multiple segment coils, a plasma is generated that is more spatially uniform than the plasma produced by a monolithic coil. This is implemented using a power distributing component that allows the RF current to be distributed in the segment coils such that a uniform plasma density can be obtained in an area spanned by the coils. For instance, variable shunts, switchable shunts, and disconnect switches can be used to vary the RF currents in the individual coils.

Abstract: A segmented transformer coupled plasma (TCP) coil is provided as a source for generating a uniform plasma in a plasma reactor. The segmented TCP is divided into two or more segment coils which, when connected to an RF source, produces a circulating flow of electrons to cause a magnetic field in the plasma. Because the segmented TCP employs multiple segment coils, a plasma is generated that is more spatially uniform than the plasma produced by a monolithic coil. This is implemented using a power distributing component that allows the RF current to be distributed in the segment coils such that a uniform plasma density can be obtained in an area spanned by the coils. For instance, variable shunts, switchable shunts, and disconnect switches can be used to vary the RF currents in the individual coils.