Electron microscope application apparatus and sample inspection method
First Claim
1. An electron microscope application apparatus, comprising:
- means for irradiating ultraviolet light to an electrode provided above a sample and said sample and controlling incidence of photoelectrons generated from said electrode and said sample by utilizing electric field applied between said electrode and said sample,wherein charges of said sample can be set to an arbitrary potential.
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Accused Products
Abstract
A charge control electrode emitting photoelectrons is disposed just above a wafer (sample) in parallel thereto, and the electrode has a through hole so that ultraviolet light can be irradiated to the wafer through the charge control electrode. Specifically, a metal plate which is formed in mesh or includes one or plural holes is used as the charge control electrode. By disposing the charge control electrode just above the sample in parallel thereto, when negative voltage is applied to the electrode, electric field approximately perpendicular to the wafer is generated. Therefore, photoelectrons are efficiently absorbed in the wafer. Also, by using the charge control electrode having approximately the same size as that of the wafer, charges on a whole surface of the wafer can be removed collectively and uniformly. Therefore, time required for the process can be reduced.
13 Citations
14 Claims
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1. An electron microscope application apparatus, comprising:
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means for irradiating ultraviolet light to an electrode provided above a sample and said sample and controlling incidence of photoelectrons generated from said electrode and said sample by utilizing electric field applied between said electrode and said sample, wherein charges of said sample can be set to an arbitrary potential.
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2. An electron microscope application apparatus, comprising:
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an electrode disposed above a sample and having at least one hole; and an ultraviolet light source for irradiating ultraviolet light to said sample and said electrode, wherein said ultraviolet light is irradiated on said sample through at least said hole in the electrode. - View Dependent Claims (3, 4, 5, 6)
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7. A sample inspection method, comprising the steps of:
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irradiating ultraviolet light to an electrode disposed above a sample and said sample; controlling incidence of photoelectron generated from said electrode and said sample to said sample by utilizing electric field applied between said electrode and said sample; and setting charges of said sample to an arbitrary potential. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification