GB1361445A – Selectively stripping metal surfaces and compositions therefor
– Google Patents
GB1361445A – Selectively stripping metal surfaces and compositions therefor
– Google Patents
Selectively stripping metal surfaces and compositions therefor
Info
Publication number
GB1361445A
GB1361445A
GB4104071A
GB4104071A
GB1361445A
GB 1361445 A
GB1361445 A
GB 1361445A
GB 4104071 A
GB4104071 A
GB 4104071A
GB 4104071 A
GB4104071 A
GB 4104071A
GB 1361445 A
GB1361445 A
GB 1361445A
Authority
GB
United Kingdom
Prior art keywords
thiourea
acid
hbf
sept
tin
Prior art date
1970-09-04
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
GB4104071A
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.)
IMASA SA
Original Assignee
IMASA SA
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.)
1970-09-04
Filing date
1971-09-02
Publication date
1974-07-24
1971-09-02
Application filed by IMASA SA
filed
Critical
IMASA SA
1974-07-24
Publication of GB1361445A
publication
Critical
patent/GB1361445A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
C23F1/44—Compositions for etching metallic material from a metallic material substrate of different composition
H—ELECTRICITY
H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
H05K3/00—Apparatus or processes for manufacturing printed circuits
H05K3/02—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
H05K3/06—Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
H05K3/067—Etchants
Abstract
1361445 Acid stripping solutions IMASA SA 2 Sept 1971 [4 Sept 1970] 41040/71 Heading C7E [Also in Division B6] An acidic solution for use in the selective stripping of tin and/or lead from a copper substrate comprises (a) a nitro-substituted aromatic compound having at least one – NO 2 group attached to an aromatic nucleus and a watersolubilizing substituent also attached to the aromatic nucleus (b) an inorganic acid capable of reacting with tin and lead to form watersoluble salts and incapable of forming a waterinsoluble film thereon, and (c) a thiourea. Compound (a) may be (o-, m-, or p-) nitrobenzene sulphonic acid, nitrobenzoic acid, nitrochlorobenzene, nitroamiline, nitrophenol, or mixtures thereof, 0À1 to 180 g/l, (b) may be HBF 4 , H 2 SiF 6 , or NH 2 SO 3 H, 3-500 g/l and (c), thiourea, a G-C 4 alkyl thiourea, or an aryl thiourea, 0À1-220 g/l. The bath preferably contains an accelerator R. COOH where R is lower alkyl, aryl, or H, e.g. formic, acetic, propionic, 1-120 g/l, and where (b) is HBF 4 , the bath preferably contains 1-120 g/l of boric acid. A wetting agent may be present, e.g. nonyl phenoxy polyoxyethylene ethanol, tertiary octyl phenoxy polyethoxy ethanol, or quaternary ammonium imidazolinium/polyalkylene glycol; contact with the Cu is by immersion or spraying; solder may be selectively removed from printed circuits with the aid of masking tape.
GB4104071A
1970-09-04
1971-09-02
Selectively stripping metal surfaces and compositions therefor
Expired
GB1361445A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US6976970A
1970-09-04
1970-09-04
Publications (1)
Publication Number
Publication Date
GB1361445A
true
GB1361445A
(en)
1974-07-24
Family
ID=22091105
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4104071A
Expired
GB1361445A
(en)
1970-09-04
1971-09-02
Selectively stripping metal surfaces and compositions therefor
Country Status (7)
Country
Link
US
(1)
US3677949A
(en)
JP
(1)
JPS5017336B1
(en)
CA
(1)
CA923024A
(en)
DE
(1)
DE2143785A1
(en)
ES
(1)
ES394816A1
(en)
FR
(1)
FR2102030A5
(en)
GB
(1)
GB1361445A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2157323A
(en)
*
1984-04-02
1985-10-23
Parker Chemical Co
Improved flavour aluminium cleaning composition and process
Families Citing this family (29)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3841905A
(en)
*
1970-11-19
1974-10-15
Rbp Chem Corp
Method of preparing printed circuit boards with terminal tabs
US3888778A
(en)
*
1973-03-13
1975-06-10
Merton Beckwith
Bright dip composition for tin/lead
US3986970A
(en)
*
1973-05-02
1976-10-19
The Furukawa Electric Co., Ltd.
Solution for chemical dissolution treatment of tin or alloys thereof
US3926699A
(en)
*
1974-06-17
1975-12-16
Rbp Chemical Corp
Method of preparing printed circuit boards with terminal tabs
US4004956A
(en)
*
1974-08-14
1977-01-25
Enthone, Incorporated
Selectively stripping tin or tin-lead alloys from copper substrates
US3990982A
(en)
*
1974-12-18
1976-11-09
Rbp Chemical Corporation
Composition for stripping lead-tin solder
USRE29181E
(en)
*
1974-12-18
1977-04-12
Rbp Chemical Corporation
Method of preparing printed circuit boards with terminal tabs
US4175011A
(en)
*
1978-07-17
1979-11-20
Allied Chemical Corporation
Sulfate-free method of etching copper pattern on printed circuit boards
US4306933A
(en)
*
1980-02-11
1981-12-22
Chemline Industries
Tin/tin-lead stripping solutions
IT1144797B
(en)
*
1981-10-14
1986-10-29
Alfachimici Spa
SOLUTION FOR THE REMOVAL OF POND OR LEAD POND ALLOY FROM A SUBSTRATE BY SPRAY OPERATION
USRE32555E
(en)
*
1982-09-20
1987-12-08
Circuit Chemistry Corporation
Solder stripping solution
US4397753A
(en)
*
1982-09-20
1983-08-09
Circuit Chemistry Corporation
Solder stripping solution
US4732649A
(en)
*
1986-06-18
1988-03-22
Macdermid, Incorporated
Method for manufacture of printed circuit boards
ZA873845B
(en)
*
1986-06-18
1987-11-24
Macdermid, Incorporated
Method for manufacture of printed circuit boards
US4806200A
(en)
*
1986-06-18
1989-02-21
Macdermid, Incorporated
Method for manufacture of printed circuit boards
DE3738307A1
(en)
*
1987-11-11
1989-05-24
Ruwel Werke Gmbh
BATH SOLUTIONS AND METHOD FOR REMOVING LEAD / TIN, LEAD, OR TIN LAYERS ON COPPER OR NICKEL SURFACES
US4957653A
(en)
*
1989-04-07
1990-09-18
Macdermid, Incorporated
Composition containing alkane sulfonic acid and ferric nitrate for stripping tin or tin-lead alloy from copper surfaces, and method for stripping tin or tin-lead alloy
US4944851A
(en)
*
1989-06-05
1990-07-31
Macdermid, Incorporated
Electrolytic method for regenerating tin or tin-lead alloy stripping compositions
US4921571A
(en)
*
1989-07-28
1990-05-01
Macdermid, Incorporated
Inhibited composition and method for stripping tin, lead or tin-lead alloy from copper surfaces
US4956035A
(en)
*
1989-08-01
1990-09-11
Rd Chemical Company
Composition and process for promoting adhesion on metal surfaces
JPH0375386A
(en)
*
1989-08-18
1991-03-29
Metsuku Kk
Method for peeling tin or tin-lead alloy
US5017267A
(en)
*
1990-07-17
1991-05-21
Macdermid, Incorporated
Composition and method for stripping tin or tin-lead alloy from copper surfaces
DE4113283C2
(en)
*
1991-04-24
1994-05-05
Kernforschungsz Karlsruhe
Use of an etching solution for the selective etching of a metallic sacrificial layer in the production of microstructures
DE4219667C2
(en)
*
1992-06-16
1994-12-01
Kernforschungsz Karlsruhe
Tool and method for producing a microstructured plastic layer
EP1302569A3
(en)
*
2001-10-11
2004-03-03
Shipley Co. L.L.C.
Stripping solution
CN100339014C
(en)
*
2003-03-27
2007-09-26
中国人民解放军第三军医大学
Application of N-acetylglucosamine in dairy product and dairy product containing N-acetylglucosamine
DE102004014680B3
(en)
*
2004-03-25
2005-07-28
Dr.-Ing. Max Schlötter GmbH & Co KG
Demetallizing solution for removing tin-bismuth layers, e.g. from electronic or electrical components, containing acid (e.g. alkylsulfonic acid), nitroaromatic compound and aminopolycarboxylic acid
EP2503029B1
(en)
*
2011-03-22
2013-03-20
Atotech Deutschland GmbH
Process for etching a recessed structure filled with tin or a tin alloy
CN111705216B
(en)
*
2020-06-16
2021-12-03
云南锡业股份有限公司锡业分公司
Treatment process of tin soldering electrolytic anode mud
1970
1970-09-04
US
US69769A
patent/US3677949A/en
not_active
Expired – Lifetime
1971
1971-08-11
CA
CA120282A
patent/CA923024A/en
not_active
Expired
1971-08-25
FR
FR7130796A
patent/FR2102030A5/fr
not_active
Expired
1971-08-30
JP
JP46065944A
patent/JPS5017336B1/ja
active
Pending
1971-09-01
DE
DE19712143785
patent/DE2143785A1/en
active
Pending
1971-09-02
GB
GB4104071A
patent/GB1361445A/en
not_active
Expired
1971-09-04
ES
ES394816A
patent/ES394816A1/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2157323A
(en)
*
1984-04-02
1985-10-23
Parker Chemical Co
Improved flavour aluminium cleaning composition and process
Also Published As
Publication number
Publication date
FR2102030A5
(en)
1972-03-31
US3677949A
(en)
1972-07-18
JPS5017336B1
(en)
1975-06-20
CA923024A
(en)
1973-03-20
ES394816A1
(en)
1974-11-16
DE2143785A1
(en)
1972-03-16
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Legal Events
Date
Code
Title
Description
1975-04-03
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
