GB495049A - Improvements relating to the manufacture of alternating electric current rectifiers - Google Patents
Improvements relating to the manufacture of alternating electric current rectifiersInfo
- Publication number
- GB495049A GB495049A GB12955/37A GB1295537A GB495049A GB 495049 A GB495049 A GB 495049A GB 12955/37 A GB12955/37 A GB 12955/37A GB 1295537 A GB1295537 A GB 1295537A GB 495049 A GB495049 A GB 495049A
- Authority
- GB
- United Kingdom
- Prior art keywords
- temperature
- manufacture
- annealing
- electric current
- current rectifiers
- 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 abstract 2
- 238000000137 annealing Methods 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 238000000034 method Methods 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
- H01L21/16—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 cuprous oxide or cuprous iodide
- H01L21/161—Preparation of the foundation plate, preliminary treatment oxidation of the foundation plate, reduction treatment
- H01L21/164—Oxidation and subsequent heat treatment of the foundation plate
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
In the manufacture of alternating current rectifiers of the type comprising a body of metal having a compound of the metal formed directly thereon by a process involving a coating step followed by an annealing step at a lower temperature, the blanks are cooled after the coating step to a temperature not exceeding the annealing temperature by more than 25 per cent before they are placed in the annealing furnace. Preferably they are cooled to within a few degrees of the temperature of the annealing furnace. Copper blanks may be oxidized, exposed to cold air for about 1 minute, and then annealed for about 10 minutes. The intermediate cooling is stated to reduce the forward resistance without a corresponding reduction in the reverse resistance.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US2172576D US2172576A (en) | 1937-05-06 | Manufacture of alternating elec | |
| GB12955/37A GB495049A (en) | 1937-05-06 | 1937-05-06 | Improvements relating to the manufacture of alternating electric current rectifiers |
| DEW3250D DE863965C (en) | 1937-05-06 | 1937-09-24 | Process for the production of AC rectifiers according to the dry surface contact system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB12955/37A GB495049A (en) | 1937-05-06 | 1937-05-06 | Improvements relating to the manufacture of alternating electric current rectifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495049A true GB495049A (en) | 1938-11-07 |
Family
ID=10014175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12955/37A Expired GB495049A (en) | 1937-05-06 | 1937-05-06 | Improvements relating to the manufacture of alternating electric current rectifiers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2172576A (en) |
| DE (1) | DE863965C (en) |
| GB (1) | GB495049A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE509424A (en) * | 1951-02-23 |
-
0
- US US2172576D patent/US2172576A/en not_active Expired - Lifetime
-
1937
- 1937-05-06 GB GB12955/37A patent/GB495049A/en not_active Expired
- 1937-09-24 DE DEW3250D patent/DE863965C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE863965C (en) | 1953-01-22 |
| US2172576A (en) | 1939-09-12 |
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