GB1256209A - Ammoniacal etching solution - Google Patents

Ammoniacal etching solution

Info

Publication number
GB1256209A
GB1256209A GB2958270A GB2958270A GB1256209A GB 1256209 A GB1256209 A GB 1256209A GB 2958270 A GB2958270 A GB 2958270A GB 2958270 A GB2958270 A GB 2958270A GB 1256209 A GB1256209 A GB 1256209A
Authority
GB
United Kingdom
Prior art keywords
acid
chloride
constituent
per litre
ion
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
GB2958270A
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.)
KENVERT INTERNAT CORP
Original Assignee
KENVERT INTERNAT 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 KENVERT INTERNAT CORP filed Critical KENVERT INTERNAT CORP
Publication of GB1256209A publication Critical patent/GB1256209A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C23F1/10—Etching compositions
    • C23F1/14—Aqueous compositions
    • C23F1/32—Alkaline compositions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,256,209. Etching. KENVERT INTERNATIONAL CORP. 18 June, 1970 [18 June, 1969; 6 May, 1970], No. 29582/70. Heading B6J. Copper, zinc, cadmium, brass or aluminium are etched with a composition comprising (1) 0À5-2À0 gram moles per litre of a haloacetic acid constituent containing the radical CXnH(3-n)COO-, in which X is chlorine, bromine or iodine and n is 1, 2 or 3, (2) 2À5-10À0 gram moles per litre of an ammoniacal constituent, and (3) a constituent providing ions of iodine, bromine or a noble metal or a mixture of such ions. (1) The acid may be trichloroacetic acid, dichloroacetic acid or dibromoacetic acid. (2) The ammoniacal constituent may be ammonium chloride or ammonium hydroxide. (3) The noble metal may be mercury, palladium, gold or silver. Examples of the ion-providing constituent are potassium iodide, sodium bromide, mercuric acid and potassium iodide, and silver nitrate. The pH of the composition is at least 7À5, preferably 8-11, and may be adjusted by adding sodium hydroxide or hydrochloric acid. The composition may also contain (4) 0À1-0À6 gram ion per litre of cupric ion, provided by cupric chloride, copper sulphate or copper acetate, and/or 0À2-3À0 gram ion per litre of chloride ion, provided by cupric chloride, ammonium chloride, sodium chloride or potassium chloride, and (5) 0À05-0À5 gram moles per litre of phosphate radical, provided by trisodium phosphate or phosphoric acid. The composition can be regenerated by adding more of the same composition together with ammonium chloride. The metal is etched at a temperature of at least 100‹ F., preferably 110-130‹ F.
GB2958270A 1969-06-18 1970-06-18 Ammoniacal etching solution Expired GB1256209A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US83454269A 1969-06-18 1969-06-18
US3526370A 1970-05-06 1970-05-06

Publications (1)

Publication Number Publication Date
GB1256209A true GB1256209A (en) 1971-12-08

Family

ID=26711944

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2958270A Expired GB1256209A (en) 1969-06-18 1970-06-18 Ammoniacal etching solution

Country Status (4)

Country Link
DE (1) DE2030070C3 (en)
FR (1) FR2046879B1 (en)
GB (1) GB1256209A (en)
NL (1) NL144993B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2140215C2 (en) * 1971-08-11 1983-10-20 Hans Hoellmueller Maschinenbau Gmbh & Co, 7033 Herrenberg Method and system for regenerating an etching solution suitable for etching copper and copper alloys, in particular copper-clad printed circuit boards, as well as measuring device of this system
US3705061A (en) * 1971-03-19 1972-12-05 Southern California Chem Co In Continuous redox process for dissolving copper

Also Published As

Publication number Publication date
DE2030070A1 (en) 1971-01-07
DE2030070C3 (en) 1974-05-09
FR2046879A1 (en) 1971-03-12
NL144993B (en) 1975-02-17
DE2030070B2 (en) 1972-03-02
FR2046879B1 (en) 1973-04-06
NL7008968A (en) 1970-12-22

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