GB1234636A - - Google Patents

Info

Publication number
GB1234636A
GB1234636A GB1234636DA GB1234636A GB 1234636 A GB1234636 A GB 1234636A GB 1234636D A GB1234636D A GB 1234636DA GB 1234636 A GB1234636 A GB 1234636A
Authority
GB
United Kingdom
Prior art keywords
etching
castor oil
sulphated
film
forming agent
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
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 filed Critical
Publication of GB1234636A publication Critical patent/GB1234636A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • 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
    • C23F1/42—Aqueous compositions containing a dispersed water-immiscible liquid

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

1,234,636. Etching. MASTER ETCHING MACHINE CO. Inc. 16 Sept., 1968, No. 43997/68. Heading B6J. Aluminium or aluminium alloy plates are masked and then etched with a solution comprising aqueous 30‹ to 40‹ BaumÚ ferric chloride, free hydrochloric acid, sulphated or sulphonated castor oil and a water-immiscible organic solvent. The castor oil acts as a film-forming agent for the sides of the relief images and inhibits undercutting thus providing high etch factors. The mixture of film-forming agent and solvent should constitute between 1 and 4À8% of the total volume of the bath, the sulphated or sulphonated castor oil being 0À08% to 1À6% and the organic solvent 0À8% to 3À2%, and specified solvents including kerosene, naphthalene and alkylbenzenes. The activity of the etching bath is maintained during etching by adding hydrochloric acid so that the solution contains 0À03% acid by volume and has a pH of approximately 1. The temperature is preferably between 60‹ and 90‹ F. A specific aluminium alloy contains 0À6% silicon, 0À25% copper, 1% magnesium and 0À25% chromium.
GB1234636D 1968-09-16 1968-09-16 Expired GB1234636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4399768 1968-09-16

Publications (1)

Publication Number Publication Date
GB1234636A true GB1234636A (en) 1971-06-09

Family

ID=10431297

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234636D Expired GB1234636A (en) 1968-09-16 1968-09-16

Country Status (1)

Country Link
GB (1) GB1234636A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482771B1 (en) * 2003-05-30 2018-11-28 Dowa Metaltech Co., Ltd. Metal/ceramic circuit board and method for producing same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1482771B1 (en) * 2003-05-30 2018-11-28 Dowa Metaltech Co., Ltd. Metal/ceramic circuit board and method for producing same

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Legal Events

Date Code Title Description
PS Patent sealed