GB701474A - Improved method of electrolytically pointing wires and electrode system comprising a pointed electrode - Google Patents

Improved method of electrolytically pointing wires and electrode system comprising a pointed electrode

Info

Publication number
GB701474A
GB701474A GB24952/51A GB2495251A GB701474A GB 701474 A GB701474 A GB 701474A GB 24952/51 A GB24952/51 A GB 24952/51A GB 2495251 A GB2495251 A GB 2495251A GB 701474 A GB701474 A GB 701474A
Authority
GB
United Kingdom
Prior art keywords
wire
electrolytically
electrode
pointing
pointed
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
GB24952/51A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB701474A publication Critical patent/GB701474A/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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F1/00—Etching metallic material by chemical means
    • C23F1/02—Local etching
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material 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)
  • Electrochemistry (AREA)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Cold Cathode And The Manufacture (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

701,474. Electrolytically printing wire. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 25, 1951 [Oct. 28, 1950], No. 24952/51. Class 41 Wire is pointed by an electrolytic process in which the wire is suspended as anode in a bath to which current is supplied, the wire previously having finely - divided insulating material added thereto. The material may be provided on the wire in the form of an envelope of, for example, aluminium oxide or magnesium oxide deposited on the wire electrophoretically. Alternatively, the wire may contain thorium oxide in a very finely-divided state, the oxide forming a skeleton 7 during pointing of the wire. The insulating material readily breaks off when the wire is removed from the electrolytic bath. The current used in the electrolytic process is about 20 milliamps per wire, the voltage being about 2 volts. The process may be used for pointing wires used in crystal detectors or amplifiers.
GB24952/51A 1950-10-28 1951-10-25 Improved method of electrolytically pointing wires and electrode system comprising a pointed electrode Expired GB701474A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL305128X 1950-10-28

Publications (1)

Publication Number Publication Date
GB701474A true GB701474A (en) 1953-12-23

Family

ID=19783462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24952/51A Expired GB701474A (en) 1950-10-28 1951-10-25 Improved method of electrolytically pointing wires and electrode system comprising a pointed electrode

Country Status (7)

Country Link
US (1) US2721838A (en)
BE (1) BE506706A (en)
CH (1) CH305128A (en)
DE (1) DE936585C (en)
FR (1) FR1044215A (en)
GB (1) GB701474A (en)
NL (1) NL73679C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2773024A (en) * 1954-04-08 1956-12-04 United States Steel Corp Method for electrolytically pointing wire
NL294698A (en) * 1962-06-29
US3524803A (en) * 1968-05-13 1970-08-18 Us Army Method of electrolytically etching field filamentary material to make emitters
US5865978A (en) * 1997-05-09 1999-02-02 Cohen; Adam E. Near-field photolithographic masks and photolithography; nanoscale patterning techniques; apparatus and method therefor
US6386959B2 (en) 1999-01-13 2002-05-14 Micro Contacts Inc. Feeding system for electro-chemically polishing contact tips

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB322118A (en) * 1928-06-05 1929-12-05 Sherard Osborn Cowper Coles An improved process and apparatus for the electrolytic removal of metal from metallic bodies
BE373635A (en) * 1929-09-23
US2434286A (en) * 1943-08-12 1948-01-13 Bell Telephone Labor Inc Method of forming a point at the end of a wire
US2545866A (en) * 1946-11-15 1951-03-20 Aluminum Co Of America Boron-containing aluminum wire and method of its production
US2628936A (en) * 1949-05-06 1953-02-17 Bell Telephone Labor Inc Method of forming a point at the end of a wire

Also Published As

Publication number Publication date
DE936585C (en) 1955-12-15
BE506706A (en)
NL73679C (en)
FR1044215A (en) 1953-11-16
CH305128A (en) 1955-02-15
US2721838A (en) 1955-10-25

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