US2449453A - Copper oxide rectifier - Google Patents

Copper oxide rectifier Download PDF

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Publication number
US2449453A
US2449453A US719610A US71961046A US2449453A US 2449453 A US2449453 A US 2449453A US 719610 A US719610 A US 719610A US 71961046 A US71961046 A US 71961046A US 2449453 A US2449453 A US 2449453A
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United States
Prior art keywords
copper
copper oxide
blank
rectifier
oxide rectifier
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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 - Lifetime
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US719610A
Inventor
Richard H Clapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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Filing date
Publication date
Application filed by Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Priority to US719610A priority Critical patent/US2449453A/en
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Publication of US2449453A publication Critical patent/US2449453A/en
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    • 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/16—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. 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
    • 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
    • H01L21/16—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. 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

Definitions

  • This invention relates to metal rectifiers, and
  • An object of the present invention is therefore a more efficient rectifier, and a feature of the invention is a dished annular blank oxidized on its convex side.
  • Figure 1 is an unoxidized copper blank according to the invention drawn partly cut away to show the copper and oxide layers in section;
  • Figure2 is the blank after oxidization and cooling, drawn partly cut away to show the copper and oxide layers in section;
  • Figure 3 is the blank as straightened by compression.
  • the copper oxide surface thereby being put in compression to about the same degree as though the blank had not been preformed.

Description

Sept. 14, 19 48. cL P 2,449,453
COPPER OXIDE RECTIFIER I Filed Dec. 51, 1946 1 INVENTOR. Rmm po (m p fi mm,
ATTORNEY Patented Sept. 14, 1948 COPPER OXIDE RECTIFIER Richard H. Clapp, Danvers, Mass, assigno'r to Sylvania Electric Products Inc, Salem, Mass, a corporation of Massachusetts Application December 31, 1946, Serial No. 719,610
This invention relates to metal rectifiers, and
particularly to copper oxide rectifiers, and to their method of manufacture.
2 Claims. (Cl. 175-366) Such rectifiers are ordinarily made by oxidizing a normally fiat annular copper blank. I have found, however, that the rectification can be greatly improved by using "dished or, curved copper blanks and oxidizing them on the convex side.
An object of the present invention is therefore a more efficient rectifier, and a feature of the invention is a dished annular blank oxidized on its convex side. Other objects features and advantages of the invention will be apparent from the following specification, taken in connection with the accompanying drawings in which:
Figure 1 is an unoxidized copper blank according to the invention drawn partly cut away to show the copper and oxide layers in section;
Figure2 is the blank after oxidization and cooling, drawn partly cut away to show the copper and oxide layers in section; and
Figure 3 is the blank as straightened by compression.
' about 1000 C.
cess of oxidizing gas to the other side, for example,
On cooling, the curvature of the blank becomes accentuated because of the greater contraction.
of the copper in relation to the copper-oxide surface, the copper oxide surface thereby being put in compression to about the same degree as though the blank had not been preformed.
However, on assembling these discs in-a rectifier unit, sufficient pressure is customarily applied to flatten all the discs, to the form shown in Figure 3, the copper being soft-annealed by the temperature of oxidation. With my preformed disc, more straightening action is required than with the usual originally-fiat discs and consequently the copper oxide is put into greater compression.
i have found that this increase in compression gives as much as .a 40% increase in rectifying ratio over the standard flat blanks. This greatly increases the usefulness of the rectifier.
What I claim is: v
1. The method of making a copper oxide rectifier blank which comprises dishing a copper blank to form having a convex and a concave side, oxidizing said blank on theconvex side at high temperature, and compressing itto a final flat form.
, 2. The method of claim 1, in which the high temperature at which the blank is oxidized is RICHARD H. cLArP.
REFERENCES CITED I The following references are of record in the file of this patent:
US719610A 1946-12-31 1946-12-31 Copper oxide rectifier Expired - Lifetime US2449453A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040099990A1 (en) * 2002-01-03 2004-05-27 Williams Bruce A. Method of manufacturing container having image-carrying sheet

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1671970A (en) * 1921-06-07 1928-06-05 Glenn W Carpenter Liquid rectifier
US1707234A (en) * 1927-06-27 1929-04-02 Kodel Radio Corp Rectifying unit and method of producing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1671970A (en) * 1921-06-07 1928-06-05 Glenn W Carpenter Liquid rectifier
US1707234A (en) * 1927-06-27 1929-04-02 Kodel Radio Corp Rectifying unit and method of producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040099990A1 (en) * 2002-01-03 2004-05-27 Williams Bruce A. Method of manufacturing container having image-carrying sheet

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