Patent ID: 6800862
Filing Date: 2004-10-05
Classification: H01J

Abstract:
An ion implanting apparatus comprising:an ion source for ionizing a raw gas to produce a plasma and extracting an ion beam from the plasma; a gas supplying device for supplying the raw gas to the ion source; a plasma producing power source for supplying a power for producing the plasma to the ion source; an energy separating magnet for selectively deriving ions having specific energy from the ion beam extracted from the ion source; an energy separating magnet power source for supplying a power for energy separation to the energy separating magnet; a scanning magnet for scanning the ion beam derived from the energy separating magnet; a scanning magnet power source for supplying a power for scanning to the scanning magnet; a beam paralleling magnet for parallel-scanning the ion beam derived from the scanning magnet so that it is in parallel to a reference axis; a beam paralleling magnet power source for supplying a power for beam paralleling to the beam paralleling magnet; an implanting chamber in which a substrate is irradiated with the ion beam derived from the beam paralleling magnet to implant ions into the substrate; and a control device for controlling an operating state of the ion implanting apparatus in a period during which the ion implantation is not carried out for the substrate in a state in any mode selected from (a) a twilight mode in which a flow rate of the raw gas supplied from the gas supplying device to the ion source and the power supplied from the plasma producing power source to the ion source are reduced to values smaller than those when the ion implantation is carried out for the substrate and capable of keeping plasma production in the ion source; (b) a magnet-off mode in which the flow rate of the raw gas supplied from the gas supplying device to the ion source and the power supplied from the plasma producing power source to the ion source are reduced to values smaller than those when the ion implantation is carried out for the substrate and capable of keeping plasma production in the ion source, and outputs from the energy separating magnet power source, scanning magnet power source and beam paralleling magnet power source are stopped; and (c) a shut-down mode in which the supply of the raw gas from the gas supplying device to the ion source is stopped and outputs from the power sources are stopped.