US2379919A - Manufacture of selenium elements - Google Patents

Manufacture of selenium elements Download PDF

Info

Publication number
US2379919A
US2379919A US485383A US48538343A US2379919A US 2379919 A US2379919 A US 2379919A US 485383 A US485383 A US 485383A US 48538343 A US48538343 A US 48538343A US 2379919 A US2379919 A US 2379919A
Authority
US
United States
Prior art keywords
selenium
elements
jig
plates
burrs
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 - Lifetime
Application number
US485383A
Other languages
English (en)
Inventor
Arthur J Miller
Eugene P Sauerborn
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.)
Federal Telephone and Radio Corp
Original Assignee
Federal Telephone and Radio Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to BE460645D priority Critical patent/BE460645A/xx
Application filed by Federal Telephone and Radio Corp filed Critical Federal Telephone and Radio Corp
Priority to US485383A priority patent/US2379919A/en
Application granted granted Critical
Publication of US2379919A publication Critical patent/US2379919A/en
Priority to FR938169D priority patent/FR938169A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
    • H10D48/043—Preliminary treatment of the selenium or tellurium, its application to foundation plates or the subsequent treatment of the combination
    • H10D48/044—Conversion of the selenium or tellurium to the conductive state
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
    • H10D48/043—Preliminary treatment of the selenium or tellurium, its application to foundation plates or the subsequent treatment of the combination
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
    • H10D48/00—Individual devices not covered by groups H10D1/00 - H10D44/00
    • H10D48/01—Manufacture or treatment
    • H10D48/04—Manufacture or treatment of devices having bodies comprising selenium or tellurium in uncombined form
    • H10D48/043—Preliminary treatment of the selenium or tellurium, its application to foundation plates or the subsequent treatment of the combination
    • H10D48/0431—Application of the selenium or tellurium to the foundation plate

Definitions

  • This invention relates to the manufacture of selenium coated elements such as are used for rectifiers and particularly to the simultaneous,
  • the object of this invention is to make or procass a plurality of selenium rectii'lers as a unit during their manufacture.
  • Selenium elements are commonly made b applying selenium to a base plate posed of a metal as iron, steel or aluminum or the like, andsubjecting the treated plates to ele-;'
  • a counterelectrode comprising a conducting substance such as Woods ordinarily com bearing the elements is then placed in a press indicated by the press platens and 6 in Fig. 1, so that the burrs are pressed into the carrier plate which should be of a metal soft enough to receive them, such as aluminum.
  • Fig. 3 shows one of the-elements in compression between the press platens and shows the burr pressed into metal is then usually applied, as by' spraying, on
  • the seleniumsurface It is thought that the rectiiying property, i. e., the ability to pass current flowing in the forward direction and to block the flow in the reverse direction'is due to the formation .of a "blocking layer at the selenium surface under the counterelectrode.
  • a number of such selenium elements are made as a unit.
  • the various steps in the fabrication and treatment of the elements are carried out with the base plates on the support.
  • Figure 1 is a cross-section view of a selenium coated element shown resting am a carrier plate J18;
  • Figure 2 is a face view of the element; c Figure 3 shows one of the elements presse into the .118; and
  • Figure 4 is a face view of a rality of elements afllxed thereto.
  • Fig: 1 shows across jig having a pluv section. of a rectifier-element in which a circumferential burr I of base plate 4 is resting on the surface of the jig 2.
  • the burr may conveniently be formed by p nching out the base plate by the use of a punch; which by its opera tion produces the hon at oneside of the punched out plate. A selenium coating is then applied; to the surface .of the base plate oppositQthe burr.
  • This may conveniently be a. layer of seleni powder.
  • a number "of these elements areisiml 4with their burrs against the jig, and are simithe jig plate.
  • the pressure required is not critical; a pressure of around 4,000 pounds per square inch having been found satisfactory.
  • the temperature should be elevated somewhat to soften the selenium for example, in the range of about C. to- C. This may be done by heating the press platens by heating elements 7 andt.
  • the selenium powder is thereby compressed and sintered sufllciently to become a solidthin layer adhering to each base plate.
  • the elements carried by the jig will then ordinarily be subjected to a second heat treatment for example by placing them in an oven at'a temperature in the range of about 150 C. to 217 C., and further treatments may be applied, such as fuming the selenium surfaces by gas or moisture.
  • a conducting alloy serving as the counter-electrode is sprayed on the selenium surfaces.
  • All of the foregoing steps may be performed while the elements are held in the jig 2; they may then be pushed an a number of base plates, placing the base" plates on a supporting jig with the burrs against the jig, covering the base plates with selenium and pressing the selenium covered plates into the- 6 Jig and then heat treating" applying counterelectrodes and electrofor'ming' the'eiements while
  • the A method of m ki a. plurality of se ing .burrs" at the bottoms of a number of I plates, coverlnsthe tops of. the-base plates with forming burrs mum elements as a unit which comprises for1n selenium and then pressing the selenium covered base plates against a jig so that the burrs enter the jig, and then further treating the elements.

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)
US485383A 1943-05-01 1943-05-01 Manufacture of selenium elements Expired - Lifetime US2379919A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE460645D BE460645A (enrdf_load_stackoverflow) 1943-05-01
US485383A US2379919A (en) 1943-05-01 1943-05-01 Manufacture of selenium elements
FR938169D FR938169A (fr) 1943-05-01 1946-03-14 Fabrication d'éléments au sélénium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US485383A US2379919A (en) 1943-05-01 1943-05-01 Manufacture of selenium elements

Publications (1)

Publication Number Publication Date
US2379919A true US2379919A (en) 1945-07-10

Family

ID=23927941

Family Applications (1)

Application Number Title Priority Date Filing Date
US485383A Expired - Lifetime US2379919A (en) 1943-05-01 1943-05-01 Manufacture of selenium elements

Country Status (3)

Country Link
US (1) US2379919A (enrdf_load_stackoverflow)
BE (1) BE460645A (enrdf_load_stackoverflow)
FR (1) FR938169A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444473A (en) * 1943-10-26 1948-07-06 Standard Telephones Cables Ltd Method of making rectifiers
US2565483A (en) * 1944-05-05 1951-08-28 Int Standard Electric Corp Process for manufacturing selenium cells
US2667722A (en) * 1950-09-18 1954-02-02 Westinghouse Brake & Signal Mold for use in the manufacture of dry rectifiers
US2749596A (en) * 1952-01-04 1956-06-12 Robert G Breckenridge Method of making titanium dioxide rectifiers
US3420688A (en) * 1965-05-26 1969-01-07 Barnes Eng Co Method of producing immersed bolometers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2444473A (en) * 1943-10-26 1948-07-06 Standard Telephones Cables Ltd Method of making rectifiers
US2565483A (en) * 1944-05-05 1951-08-28 Int Standard Electric Corp Process for manufacturing selenium cells
US2667722A (en) * 1950-09-18 1954-02-02 Westinghouse Brake & Signal Mold for use in the manufacture of dry rectifiers
US2749596A (en) * 1952-01-04 1956-06-12 Robert G Breckenridge Method of making titanium dioxide rectifiers
US3420688A (en) * 1965-05-26 1969-01-07 Barnes Eng Co Method of producing immersed bolometers

Also Published As

Publication number Publication date
BE460645A (enrdf_load_stackoverflow)
FR938169A (fr) 1948-09-07

Similar Documents

Publication Publication Date Title
US3860949A (en) Semiconductor mounting devices made by soldering flat surfaces to each other
US2345122A (en) Dry rectifier
US2423869A (en) Composite structure and method of making the same
US2379919A (en) Manufacture of selenium elements
US2361492A (en) Diamond saw and method of making the same
US2444255A (en) Fabrication of rectifier cells
JPS62254439A (ja) 大面積の電力用電子デバイスを基板上に固定する方法
US3593412A (en) Bonding system for semiconductor device
US2414801A (en) Rectifier element and stack
US2359377A (en) Method of making selenium elements
US2134131A (en) Electric rectifier
US2444473A (en) Method of making rectifiers
JPH0496256A (ja) 金属製ハーメチックシール蓋
US2356094A (en) Method of treating selenium elements
US2392744A (en) Method of making selenium elements
US2397308A (en) Method of making piston rings
CA960445A (en) Metal layer rivet form, tooling, process and assembly
US2342278A (en) Manufacturing selenium cells
US2417839A (en) Manufacture of rectifier discs
US2393938A (en) Method of making selenium elements
US2434960A (en) Metal rectifier
US2450020A (en) Manufacture of rectifier disks
US2452577A (en) Dry rectifier element and method of manufacture
DE1083936B (de) Elektrische Halbleitervorrichtung fuer groessere Leistungen und Verfahren zur Herstellung einer solchen Vorrichtung
US2414471A (en) High current rectifier