NL74193C - - Google Patents
Info
- Publication number
- NL74193C NL74193C NL74193DA NL74193C NL 74193 C NL74193 C NL 74193C NL 74193D A NL74193D A NL 74193DA NL 74193 C NL74193 C NL 74193C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
- H01J37/06—Electron sources; Electron guns
- H01J37/063—Geometrical arrangement of electrodes for beam-forming
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Beam Exposure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH985831X | 1948-05-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL74193C true NL74193C (en:Method) |
Family
ID=4551548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL74193D NL74193C (en:Method) | 1948-05-10 |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH265972A (en:Method) |
| DE (1) | DE809221C (en:Method) |
| FR (1) | FR985831A (en:Method) |
| NL (1) | NL74193C (en:Method) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7906958A (nl) * | 1979-09-19 | 1981-03-23 | Philips Nv | Metaaldraadkathode voor elektronenstraalapparaat. |
-
0
- NL NL74193D patent/NL74193C/xx active
-
1948
- 1948-05-10 CH CH265972D patent/CH265972A/de unknown
- 1948-11-16 DE DEP21813A patent/DE809221C/de not_active Expired
-
1949
- 1949-05-10 FR FR985831D patent/FR985831A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR985831A (fr) | 1951-07-24 |
| DE809221C (de) | 1951-07-26 |
| CH265972A (de) | 1949-12-31 |