GB523216A - Improvements relating to the manufacture of alternating current rectifiers - Google Patents
Improvements relating to the manufacture of alternating current rectifiersInfo
- Publication number
- GB523216A GB523216A GB37680/38A GB3768038A GB523216A GB 523216 A GB523216 A GB 523216A GB 37680/38 A GB37680/38 A GB 37680/38A GB 3768038 A GB3768038 A GB 3768038A GB 523216 A GB523216 A GB 523216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- manufacture
- alternating current
- improvements relating
- current rectifiers
- bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 title 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 229910052711 selenium Inorganic materials 0.000 abstract 1
- 239000011669 selenium Substances 0.000 abstract 1
- 235000011121 sodium hydroxide Nutrition 0.000 abstract 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/06—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising selenium or tellurium in uncombined form other than as impurities in semiconductor bodies of other materials
- H01L21/10—Preliminary treatment of the selenium or tellurium, its application to the foundation plate, or the subsequent treatment of the combination
- H01L21/105—Treatment of the surface of the selenium or tellurium layer after having been made conductive
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
523,216. Asymmetrically-conducting resistances. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., THOMPSON, L. E., and JENKINS, A. Dec. 28, 1938, No. 37680. [Class 37] After the conversion of the selenium of a rectifier to the metallic state the element is subjected to the action of a neutral, acid or alkaline liquid bath of an oxidizing character. Caustic soda, sodium peroxide, hydrogen peroxide and nitric acid are mentioned as examples of suitable materials for the bath.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB37680/38A GB523216A (en) | 1938-12-28 | 1938-12-28 | Improvements relating to the manufacture of alternating current rectifiers |
| FR859693D FR859693A (en) | 1938-12-28 | 1939-08-30 | Improvements in the manufacture of asymmetric conductivity devices for alternating currents |
| US293596A US2266922A (en) | 1938-12-28 | 1939-09-06 | Manufacture of alternating current rectifiers |
| DEW3255D DE856663C (en) | 1938-12-28 | 1939-12-13 | Process for the manufacture of selenium rectifiers |
| CH263405D CH263405A (en) | 1938-12-28 | 1946-05-21 | Process for the manufacture of elements of alternating current rectifiers. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB37680/38A GB523216A (en) | 1938-12-28 | 1938-12-28 | Improvements relating to the manufacture of alternating current rectifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB523216A true GB523216A (en) | 1940-07-09 |
Family
ID=10398214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37680/38A Expired GB523216A (en) | 1938-12-28 | 1938-12-28 | Improvements relating to the manufacture of alternating current rectifiers |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2266922A (en) |
| CH (1) | CH263405A (en) |
| DE (1) | DE856663C (en) |
| FR (1) | FR859693A (en) |
| GB (1) | GB523216A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE445491A (en) * | 1941-05-07 | |||
| BE471989A (en) * | 1941-07-16 | |||
| US2522474A (en) * | 1942-07-02 | 1950-09-12 | Battelle Memorial Institute | Treatment of zinc surfaces |
| US2438923A (en) * | 1943-02-11 | 1948-04-06 | Fed Telephone & Radio Corp | Method and means for making selenium elements |
| BE476039A (en) * | 1943-07-30 | 1900-01-01 | ||
| DE967323C (en) * | 1943-08-06 | 1957-11-07 | Siemens Ag | Process for the production of selenium rectifiers, the top electrode of which is thallium added in small quantities |
| BE474674A (en) * | 1945-05-12 | |||
| NL80773C (en) * | 1948-12-29 | 1900-01-01 | ||
| US2841749A (en) * | 1955-04-11 | 1958-07-01 | Sarkes Tarzian | Selenium rectifier |
-
1938
- 1938-12-28 GB GB37680/38A patent/GB523216A/en not_active Expired
-
1939
- 1939-08-30 FR FR859693D patent/FR859693A/en not_active Expired
- 1939-09-06 US US293596A patent/US2266922A/en not_active Expired - Lifetime
- 1939-12-13 DE DEW3255D patent/DE856663C/en not_active Expired
-
1946
- 1946-05-21 CH CH263405D patent/CH263405A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2266922A (en) | 1941-12-23 |
| DE856663C (en) | 1952-11-24 |
| CH263405A (en) | 1949-08-31 |
| FR859693A (en) | 1940-12-24 |
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