Patent ID: 7791049
Filing Date: 2010-09-07
Classification: H01J

Abstract:
1. An ion implantation apparatus including a beam line arranged to implant an ion to a wafer by irradiating an ion beam, the ion beam arranged to be extracted from an ion source and running over the beam line and being passed through a mass analysis magnet apparatus and a mass analysis slit to the wafer on the beam line, and after passing the mass analysis slit on the beam line, the ion beam being arranged to reciprocally scanned by a beam scanner, wherein the ion implantation apparatus further includes: an injector flag Faraday cup arranged on the beam line after passing a second quadrupole vertically focusing electromagnet and before incidence of the beam scanner, the Faraday cup being adapted to detect a full beam current by measuring a total beam amount of the ion beam to be able to be brought in and out thereto and therefrom, the Faraday cup that shuts off the ion beam as necessary, entering or leaving against the beam line before incidence of the beam scanner on the beam line, and then the ion beam full stopping, receiving, measuring or full passing on the beam line just before the beam scanning, and a scanner housing that contains the beam scanner and the Faraday cup, the Faraday cup being arranged immediately after an ion beam inlet at the scanner housing and the beam scanner being arranged immediately after the Faraday cup, the Faraday cup being provided with an incident beam receiving area in correspondence with a sectional shape of the ion beam which is constituted by an elliptical or a flat shape having a long axis in a lateral direction by shaping with the second quadrupole vertically focusing electromagnet, the incident beam receiving area of the Faraday cup being constituted by a rectangular shape slightly larger than a sectional shape of the ion beam.