GB1424252A - Electrolytic method for making thin film tungsten-thorium alloy - Google Patents

Electrolytic method for making thin film tungsten-thorium alloy

Info

Publication number
GB1424252A
GB1424252A GB4743973A GB4743973A GB1424252A GB 1424252 A GB1424252 A GB 1424252A GB 4743973 A GB4743973 A GB 4743973A GB 4743973 A GB4743973 A GB 4743973A GB 1424252 A GB1424252 A GB 1424252A
Authority
GB
United Kingdom
Prior art keywords
alloy
electro
plating
posts
plated
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
GB4743973A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1424252A publication Critical patent/GB1424252A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/56—Electroplating: Baths therefor from solutions of alloys

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electroplating And Plating Baths Therefor (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

1424252 Electro-plating tungsten-thorium alloy INTERNATIONAL BUSINESS MACHINES CORP 11 Oct 1973 [23 Feb 1973] 47439/73 Heading C7B [Also in Divisions G5 and H1] A thin-film alloy of W-Th is electro-plated on a substrate of which at least part is conductive from a heated aqueous solution containing WO 3 and Na 3 PO 4 , to which is gradually added aqueous Th(SO 4 ) 2 during plating. The basic substrate may be temporary, semitemporary or permanent. As described, a Cu layer 6 on Al 2 O 3 base 4, through which project electro-deposited Au pins 5 with their other ends flush with the Cu surface, is coated with a photo-resist to leave conductive paths 6' connecting pairs of posts 5. The W-Th alloy is deposited on 6' and the Cu etched away leaving the alloy supported on the posts in a form useful as part of a rectangular array of similar films in an incandescent filament character display device. Alternatively the entire Cu layer may be W-Th plated, a resist applied as before and the unwanted Cu and Th-W alloy etched, the latter with NaOH-K 3 Fe(CN) 6 . Plating conditions specified are a temperature of 80‹C, a c.d. of 160 mA/cm<SP>2</SP> for 10-30 mins, with addition of 20 drops/min of 10% w/w Th(SO 4 ) 2 solution. The alloy may be annealed to the single crystal state.
GB4743973A 1973-02-23 1973-10-11 Electrolytic method for making thin film tungsten-thorium alloy Expired GB1424252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US335199A US3859176A (en) 1973-02-23 1973-02-23 Method for making thin film tungsten-thorium alloy

Publications (1)

Publication Number Publication Date
GB1424252A true GB1424252A (en) 1976-02-11

Family

ID=23310700

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4743973A Expired GB1424252A (en) 1973-02-23 1973-10-11 Electrolytic method for making thin film tungsten-thorium alloy

Country Status (7)

Country Link
US (1) US3859176A (en)
JP (1) JPS49115937A (en)
CA (1) CA1037414A (en)
DE (1) DE2356958A1 (en)
FR (1) FR2190944B1 (en)
GB (1) GB1424252A (en)
IT (1) IT993936B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117957A (en) * 1982-02-22 1983-10-19 British Aerospace Testing of infra-red sensitive equipment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218744A (en) * 1978-08-08 1980-08-19 Avicon Development Group Fuel flow consumption monitoring system
US4432839A (en) * 1981-06-18 1984-02-21 Diamond Shamrock Corporation Method for making metallided foils
US6200453B1 (en) * 1997-10-20 2001-03-13 Rajev R. Agarrwal Monolith electroplating process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2160322A (en) * 1934-09-18 1939-05-30 Tungsten Electrodeposit Corp Electrodeposition of tungsten alloys
US2160321A (en) * 1936-02-06 1939-05-30 Tungsten Electrodeposit Corp Electrodeposition of tungsten alloys
US3322653A (en) * 1958-03-17 1967-05-30 Rca Corp Method of making a two sided storage electrode

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2117957A (en) * 1982-02-22 1983-10-19 British Aerospace Testing of infra-red sensitive equipment

Also Published As

Publication number Publication date
CA1037414A (en) 1978-08-29
FR2190944B1 (en) 1976-06-18
DE2356958A1 (en) 1974-08-29
US3859176A (en) 1975-01-07
JPS49115937A (en) 1974-11-06
IT993936B (en) 1975-09-30
FR2190944A1 (en) 1974-02-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee