Patent ID: 8772741
Filing Date: 2014-07-08
Classification: H01J

Abstract:
1. An ion implantation method comprising: reciprocally scanning an ion beam; mechanically scanning a wafer in a direction perpendicular to a beam scanning direction; and implanting ions into the wafer, wherein the wafer is divided into a plurality of implantation regions in the wafer surface in a wafer mechanical scanning direction, a beam scanning speed in the beam scanning direction is set to be varied for each of the implantation regions, an ion implantation amount distribution for each of the implantation regions is controlled by changing and controlling the beam scanning speed on the basis of a speed pattern calculated through variable setting of the beam scanning speed corresponding to the ion implantation amount distribution for each of the implantation regions, and the ion implantation amount for each of the implantation regions is controlled and a beam scanning frequency and a beam scanning amplitude in the control of the beam scanning speed for each of the implantation regions are made to be constant by setting a wafer mechanical scanning speed so as to correspond to each of the implantation regions and controlling the wafer mechanical scanning speed for each of the implantation regions.