Invention Grant
US08471476B2 Inductively coupled plasma flood gun using an immersed low inductance FR coil and multicusp magnetic arrangement 有权
电感耦合等离子体喷枪采用浸入式低电感FR线圈和多脉冲磁排列

Inductively coupled plasma flood gun using an immersed low inductance FR coil and multicusp magnetic arrangement
Abstract:
A device is disclosed for providing an inductively coupled radio frequency plasma flood gun. In one particular exemplary embodiment, the device is a plasma flood gun in an ion implantation system. The plasma flood gun may comprise a plasma chamber having one or more apertures; a gas source capable of supplying at least one gaseous substance to the plasma chamber; a single-turn coil disposed within the plasma chamber, and a power source coupled to the coil for inductively coupling radio frequency electrical power to excite the at least one gaseous substance in the plasma chamber to generate a plasma. The inner surface of the plasma chamber may be free of metal-containing material and the plasma may not be exposed to any metal-containing component within the plasma chamber. The plasma chamber may include a plurality of magnets for controlling the plasma. An exit aperture may be provided in the plasma chamber to enable negatively charged particles of the resulting plasma to engage an ion beam that is part of the associated ion implantation system. In one embodiment, magnets are disposed on opposite sides of the aperture and are used to manipulate the electrons of the plasma.
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