Abstract:
An objective of the present invention is to provide a plasma doping apparatus for stably doping a substrate to be treated, and to increase surface uniformity of dopant on the substrate to be treated. A plasma generation device (39) provided in the plasma doping apparatus (31) includes a microwave generation unit (35) to generate a microwave for plasma excitation; a dielectric window (36) allowing the microwave generated from the microwave generation unit (35) to be transmitted into a processing vessel (32); and a radial line slot antenna (37) provided thereon with a plurality of slots to radiate the microwave to the dielectric window (36). A control unit (28) controls a gas supplying unit (33) to supply a doping gas and a gas for the plasma excitation into the processing vessel (32) while positioning a substrate (W) to be treated on a supporting unit (34), and controls the plasma generation device (39) to generate the plasma after the doping gas and the gas for the plasma excitation are supplied by the gas supplying unit (33) so that doping is performed on the substrate (W) such that a density of a dopant implanted into the substrate (W) to be treated is less than 1X1013atoms/cm2.
Abstract:
플라즈마 도핑 장치(31)는, 피처리 기판(W)에 도펀트를 주입하여 도핑을 하는 플라즈마 도핑 장치(31)로서, 그 내부에서 피처리 기판(W)에 도펀트를 주입시키는 처리 용기(32)와, 처리 용기(32) 내에 도핑 가스 및 플라즈마 여기용의 불활성 가스를 공급하는 가스 공급부(33)와, 처리 용기(32) 내에 배치되고, 그 위에서 피처리 기판(W)을 유지하는 유지대(34)와, 마이크로파를 이용하여, 처리 용기(32) 내에 플라즈마를 발생시키는 플라즈마 발생 기구(39)와, 처리 용기(32) 내의 압력을 조정하는 압력 조정 기구와, 플라즈마 도핑 장치(31)를 제어하는 제어부(28)를 구비한다. 제어부(28)는, 처리 용기(32) 내의 압력을 100 mTorr 이상 500 mTorr 미만으로 하도록 압력 조정 기구를 제어하고, 플라즈마 발생 기구(39)에 의해 발생시킨 플라즈마에 의해 피처리 기판(W)에 플라즈마 처리를 한다.
Abstract:
Provided is a plasma doping apparatus which performs doping without deforming a substrate before and after the doping with good conformaility, and makes the injected dopants be not separated in a process of cleaning after the doping. A control unit (28), which is formed to the plasma doping apparatus, controls a pressure control unit to make the pressure in a processing container (32) be a first pressure, controls a bias power supply unit to make a bias power which is supplied to a maintenance unit (34) be a first bias power; performs a first plasma processing on a substrate (W) which is to be processed by the plasma generated by a plasma generation unit (39); controls the pressure control unit to make the pressure within the processing container be a second pressure which is higher than the first pressure after the first plasma processing; controls the bias power supply unit to make the bias power supplied to the maintenance unit to be a second bias power which is lower than the first bias power; and performs a second plasma processing on the target substrate by the plasma generated by the plasma generation unit.