Patent ID: 8293070
Filing Date: 2012-10-23
Classification: C23C

Abstract:
1. Oxygen ion implantation equipment comprising: a cylindrical chamber, which has a bottom wall on one end face thereof and is open in another end face thereof; a wafer holder housed in the chamber, the wafer holder rotatably holding a plurality of wafers on a same circumference of a circle; a disk-shaped cap closing an opening of the chamber while making the chamber airtight with a sealing member, the cap inside which a ring-shaped coolant passage is formed near the sealing member; and a plurality of lamp heaters disposed in such a way as to face any one of the plurality of wafers held by the wafer holder, the lamp heaters being disposed so as to extend in a direction of a tangent to a circumference of the cap and align parallel to a direction of a radius of the cap, wherein when the plurality of lamp heaters are divided into inner lamps located on an inner side of the cap in the direction of the radius thereof and outer lamps located on an outer side of the cap in the direction of the radius thereof, an amount of heat applied to the wafer per unit time by the outer lamps is made larger than an amount of heat applied to the wafer per unit time by the inner lamps.