US3585383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microanalyzer for producing a characteristic ionic image of a sample surface
Assignee: Centre National de la Recherche Scientifique
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Filing: 1966-01-03
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Granted: 1971-06-15
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Expires: 1986-01-03
Abstract
Abstract The present invention relates to microanalysers and more particularly to microanalysers making use of the secondary ion emission for producing, by means of a corpuscular optical system which combines ion optics and mass spectrography, ''''characteristic images'''' of the surface of the sample which indicate the map of distribution of its various elements or isotopes.
Inventors
- 👤 Raymond Castaing
- 👤 Georges Slodzian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:50
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/44; H01J49/46; H01J49/48; H01J37/00; H01J37/02; H01J37/04; H01J37/05; H01J37/252; H01J49/02; H01J49/10; H01J49/14; H01J49/142; H01J49/26; H01J49/28; H01J49/284; H01J49/286; H01J49/466
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A microanalyser arrangement for providing a characteristic ionic image of the surface of a sample by bombarding said sample with particles causing the emission of secondary characteristic ions, said arrangement comprising: a primary ion source for bombarding said sample; lens means for concentrating said secondary ions to form a beam providing an ionic image of the sample surface; means positioned in the path of said beam for eliminating, from said beam, ions having an energy higher than a predetermined value, for obtaining an energy filtered beam; magnetic field means positioned in the path of said filtered beam for rejecting therefrom the ions having a momentum different from a predetermined value, said magnetic means having an outlet; and means located at said outlet for displaying said ionic image, wherein said magnetic filed means comprise a magnetic sector and means for controlling the magnetic field in said sector, wherein said eliminating means comprise an ion mirror, said ion mirror comprising means for reflecting ions whose energy is lower than a predetermined level and for eliminating the other ions.
Claim 2
Dependent Claim
21 words
An arrangement as claimed in claim 2, comprising a further magnetic sector positioned for deflecting said beam towards said ion mirror.
Claim 3
Dependent Claim
25 words
An arrangement as claimed in claim 3, wherein said mirror comprises an electrode which collects the ions having an energy higher than said predetermined level.
Claim 4
Dependent Claim
35 words
An arrangement as claimed in claim 3, wherein said mirror comprises an apertured electrode, having a center hole for allowing the ions, whose energy is higher than said predetermined level, to propagate beyond said mirror.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |