Patent ID: 6423192
Filing Date: 2002-07-23
Classification: C23C,H01J,H01L

Abstract:
A sputtering apparatus comprising:a vacuum process chamber configured to accommodate a substrate to be processed; a support member configured to support the substrate in said process chamber; a gas supply system configured to supply a process gas into said process chamber; an exciting system configured to excite the process gas to generate a plasma by causing discharge in said process chamber; a sputter target disposed in said process chamber so as to oppose the substrate and to be collided by ions in the plasma to emit a film forming material; a first negative biasing section configured to apply a first negative potential to said target; a second negative biasing section configured to apply a second negative potential to the substrate; an ion reflecting plate disposed in said process chamber so as to surround a space between the substrate and said target; a positive biasing section configured to apply a positive potential to said ion reflecting plate; a conductive component disposed in said process chamber to form a path along which electrons are released from the plasma; and a magnetic field forming system configured to form in said process chamber a closed magnetic field for trapping electrons in the plasma on a surface of said target and a divergent magnetic field for directing the electrons in the plasma to said conductive component.