Patent ID: 9312163
Filing Date: 2016-04-12
CPC Classification: H01J,H01L,Y10T

Claim Text:
1. An impurity-doped layer formation apparatus comprising: a process chamber configured to perform a process of forming an impurity-doped layer including phosphorus or carbon on a substrate by irradiation of an ion beam including phosphorus or carbon onto the substrate; and an electrostatic chuck accommodated in the process chamber and including a chuck surface for holding the substrate, wherein the impurity-doped layer formation apparatus is configured to shield the chuck surface at least for a certain duration during a process suspension period, in order to suppress transfer of foreign materials including phosphorus or carbon from a surface of the process chamber to the chuck surface, wherein the process chamber comprises a protective member having a protective surface for shielding the chuck surface, wherein the protective member is located outside a path of the ion beam in the process chamber, wherein the apparatus further comprises a substrate holder configured to support the electrostatic chuck so as to hold the substrate upright during the process, wherein the substrate holder movably supports the electrostatic chuck to or from an evacuation position of the electrostatic chuck at which the chuck surface is in proximity to or in contact with the protective surface, wherein the substrate holder comprises a first driving unit that provides movement of the electrostatic chuck in a first direction for mechanical scan of the substrate relative to the ion beam, and a second driving unit that provides movement of the electrostatic chuck in a second direction different from the first direction, wherein the second driving unit moves the electrostatic chuck to or from the evacuation position, wherein the first driving unit is mounted on the second driving unit so that the first driving unit can be moved by the second driving unit in the second direction, wherein the protective member is located on a path of movement of the electrostatic chuck by the second driving unit, and wherein the evacuation position of the electrostatic chuck is defined at an end of a range of movement in which the electrostatic chuck can be moved by the second driving unit.