Charged particle beam apparatus
First Claim
1. A charged particle beam apparatus comprising:
- a charged particle source to generate a charged particle beam that works as a probe;
an aperture to limit the diameter of the particle beam;
an optics for the charged particle beam;
a specimen holder on which a specimen, to which the charged particle beam is to be irradiated, is mounted;
a charged particle detector to detect secondary charged particles and backscattered charged particles from a specimen; and
a signal calculation unit to process an output signal from the charged particle detector, whereinthe charged particle detector includes a first small detector having a first detection sensitivity and a second small detector having a second detection sensitivity higher than the first detection sensitivity, andthe charged particle detector makes detection solid angles viewed from a position on the specimen, to which the charged particle beam is to be irradiated, for the first small detector and for the second small detector to be the same.
1 Assignment
0 Petitions
Accused Products
Abstract
In order to provide a charged particle beam apparatus that can detect charged particle beam signals in discrimination into a plurality of energy bands, and obtain high-resolution images for each of the energy bands using the signals, the charged particle beam apparatus has a charged particle source (12-1); an aperture (16) that limits the diameter of the charged particle beam (4); optics (14, 17, 19) for the charged particle beam; a specimen holder (21); a charged particle detector (40) that detects secondary charged particles and reflected charged particles from a specimen; and signal calculation unit that processes the output signal from the charged particle detector. The charged particle detector (40) is provided with a first small detector (51) having a first detection sensitivity and a second small detector (52) having a second detection sensitivity, and makes the detection solid angle viewed from a position on the specimen, to which the charged particle beam (4) is to be radiated, to be the same for the first small detector (51) and the second small detector (52).
25 Citations
17 Claims
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1. A charged particle beam apparatus comprising:
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a charged particle source to generate a charged particle beam that works as a probe; an aperture to limit the diameter of the particle beam; an optics for the charged particle beam; a specimen holder on which a specimen, to which the charged particle beam is to be irradiated, is mounted; a charged particle detector to detect secondary charged particles and backscattered charged particles from a specimen; and a signal calculation unit to process an output signal from the charged particle detector, wherein the charged particle detector includes a first small detector having a first detection sensitivity and a second small detector having a second detection sensitivity higher than the first detection sensitivity, and the charged particle detector makes detection solid angles viewed from a position on the specimen, to which the charged particle beam is to be irradiated, for the first small detector and for the second small detector to be the same. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A charged particle beam apparatus comprising:
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a charged particle source to generate a charged particle beam; a specimen holder on which a specimen, to which the charged particle beam is to be irradiated, is mounted; an objective lens to converge the charged particle beam onto the specimen; a charged particle detector to detect secondary charged particles and backscattered charged particles from a specimen; and a signal calculation unit to process an output signal from the charged particle detector, wherein the charged particle detector includes a first small detector having a first detection sensitivity and a second small detector having a second detection sensitivity higher than the first detection sensitivity, and the charged particle detector makes detection solid angles viewed from a position on the specimen, to which the charged particle beam is to be irradiated, for the first small detector and for the second small detector to be the same. - View Dependent Claims (15, 16, 17)
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Specification