GB579824A - Improvements in silicon-crystal rectifiers - Google Patents

Improvements in silicon-crystal rectifiers

Info

Publication number
GB579824A
GB579824A GB1302543A GB1302543A GB579824A GB 579824 A GB579824 A GB 579824A GB 1302543 A GB1302543 A GB 1302543A GB 1302543 A GB1302543 A GB 1302543A GB 579824 A GB579824 A GB 579824A
Authority
GB
United Kingdom
Prior art keywords
crystal
electrolyte
cup
immersed
current
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
Application number
GB1302543A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 BE467885D priority Critical patent/BE467885A/xx
Priority to NL70886D priority patent/NL70886C/xx
Application filed by General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1302543A priority patent/GB579824A/en
Priority to FR927443D priority patent/FR927443A/en
Publication of GB579824A publication Critical patent/GB579824A/en
Priority to CH263779D priority patent/CH263779A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
    • C25F3/00—Electrolytic etching or polishing
    • C25F3/02—Etching
    • C25F3/12—Etching of semiconducting materials
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Weting (AREA)

Abstract

579,824. Detectors. GENERAL ELECTRIC CO:, Ltd., and RANSLEY, C. E. Aug. 11, 1943, No. 13025. [Class 40 (v)] The manufacture of a crystal rectifier includes as a last stage a process wherein the operative part of the crystal surface is made cathodic in an electrolyte. The crystal which is mainly silicon, may contain a small amount of aluminium or beryllium and may be prepared by the method described in Specification 577,181, [Group III], which may include subjecting the surface to an oxidising process. For the electrolytic treatment, the crystal, preferably mounted in a metal cup, has its surface immersed in an electrolyte such as dilute hydrofluoric or sulphuric acid, together with an inert anode such as platinum wire, the crystal and the anode being connected to an external source of current. The source of current may be dispensed with if the crystal is mounted in a cup made of a metal which is electro-positive to the crystal, e.g. brass. In this case, the crystal and cup are immersed in the dilute electrolyte.
GB1302543A 1943-08-11 1943-08-11 Improvements in silicon-crystal rectifiers Expired GB579824A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE467885D BE467885A (en) 1943-08-11
NL70886D NL70886C (en) 1943-08-11
GB1302543A GB579824A (en) 1943-08-11 1943-08-11 Improvements in silicon-crystal rectifiers
FR927443D FR927443A (en) 1943-08-11 1946-05-28 Electric rectifiers
CH263779D CH263779A (en) 1943-08-11 1946-08-21 Method of manufacturing a crystal rectifier.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1302543A GB579824A (en) 1943-08-11 1943-08-11 Improvements in silicon-crystal rectifiers

Publications (1)

Publication Number Publication Date
GB579824A true GB579824A (en) 1946-08-16

Family

ID=10015431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1302543A Expired GB579824A (en) 1943-08-11 1943-08-11 Improvements in silicon-crystal rectifiers

Country Status (5)

Country Link
BE (1) BE467885A (en)
CH (1) CH263779A (en)
FR (1) FR927443A (en)
GB (1) GB579824A (en)
NL (1) NL70886C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1005193B (en) * 1951-10-12 1957-03-28 Int Standard Electric Corp Method of manufacturing crystal rectifiers with negative resistance
DE1031893B (en) * 1952-08-01 1958-06-12 Standard Elektrik Ag Process for the outer shaping of semiconductor arrangements, in particular for rectifier and amplifier purposes with semiconductors made of germanium or silicon
BE536485A (en) * 1954-03-18
DE1052575B (en) * 1954-06-23 1959-03-12 Siemens Ag Process for the production of contacts on semiconductor bodies for semiconductor arrangements
NL111654C (en) * 1956-06-21

Also Published As

Publication number Publication date
NL70886C (en)
FR927443A (en) 1947-10-29
BE467885A (en)
CH263779A (en) 1949-09-15

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