Charged-particle distribution measuring apparatus

Details Charged-particle distribution measuring apparatus Charged-particle distribution measuring apparatus

1989-11-15

1991-02-12

Wieder, Kenneth

Electricity: measuring and testing

Determining nonelectric properties by measuring electric...

Beam of atomic particles

324 711, G01N 2700

Patent

active

049927426

ABSTRACT:
A charged-particle distribution measuring apparatus includes a particle passing member having a plurality of through-holes through which portions of a beam of charged particles can pass, a particle trapping member for trapping charged particles that have passed through the through-holes, a recoil particle trapping member disposed between the particle passing member and the particle trapping member, and a mechanism for moving the members to measure the spatial distribution of the charged particle beam. Preferably, the through-holes in the particle passing member are uniformly distributed in a checkerboard pattern. The movement of the members permits measurement of the currents produced by the charged particle beam at various intervals between the locations of the through-holes at the beginning of the measurement. The measurement of the charged particle beam intensity at positions across through the beam, rather than at fixed locations within the beam, improves the resolution of the measured distribution. The apparatus can be employed with positively and negatively charged beams and is useful in ion implantation.

REFERENCES:
patent: 4724324 (1988-02-01), Liebert
Remnev, Sectioned Faraday cylinder, Instruments and Experimental Techniques, vol. 19, No. 3, pt. 1, pp. 637-639, May-Jun. 1976.
Nikkan Kogyou Shinbunsha, "Electron/Ion Beam Handbook", Sep. 25, 1986, p. 275.
J. G. Siekman "New Microprobe Techniques for Measuring the Current Distribution in an Electron Beam used for Weldin", pp. 391-395, 12-1974.
N. Natsuaki et al, "Spatial Dose Uniformity Monitor for Scanned Ion Beam", pp. 1300-1304, 5-1978.
E. P. EerNisse, "Ion Beam Profile Monitor", pp. 266-268, 3-1975.

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