EP 0751233 B1 19990107 - Copper strip or plate with brown coating and process for the production
Title (en)
Copper strip or plate with brown coating and process for the production
Title (de)
Kupferband oder -blech mit brauner Deckschicht und Verfahren zu seiner Herstellung
Title (fr)
Bande ou plaque en cuivre pourvue d'un revêtement brun et procédé de fabrication
Publication
Application
Priority
DE 19523646 A 19950629
Abstract (en)
[origin: EP0751233A1] Copper strip or sheet has a dark brown covering layer consisting of a 1st layer, made of Cu2O adhering to the base metal, of thickness of 0.05-5 (pref. 0.1-1) microns, and a second layer made of CuO of thickness of 1-100 (pref. 10-50) nm over the 1st layer. In the prodn. of a covering layer on a semi-finished prod. sheet made of Cu, a strip-like Cu semi-finished prod. is heat-treated at 250-750 degrees C for 0.1-5 mins. in a mixed gas atmos. contg. up to 15 vol.% O2 to form a Cu2O layer, and then heat-treated under oxidising conditions to form a CuO layer at 200-450 degrees C for 1-30 mins. in a mixed gas atmos. contg. 10-21 vol.% O2. Alternatively, a strip-like Cu semi-finished prod. is heat treated at 250-750 degrees C for 0.1-5 mins. for 0.1-5 mins. in a mixed gas atmos. contg. 1-21 vol.% O2, and then treated with an aq. soln. contg. alkaline salt alone or in cpd. with a salt of (in)organic peroxide and oxychloride acids. One surface of the semi-finished prod. is textured before heat treated. Heat treatment is carried out at 450-600 degrees C. The O2 content in the mixed gas atmos. is 3-10 vol.%. The aq. treating soln. has a pH of 10-14. The strip-like semi-finished prod. is electrolytically treated in the aq. soln., where the prod. is connected as anode, using a current density of 1-20 A/dm<2>. The strip-like semifinished prod. is deformed by up to 40 (pref. 5-7)%.
IPC 1-7
IPC 8 full level
C23C 8/10 (2006.01)
CPC (source: EP US)
C23C 8/10 (2013.01 - EP US); Y10T 428/24975 (2015.01 - EP US); Y10T 428/265 (2015.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0751233 A1 19970102; EP 0751233 B1 19990107; EP 0751233 B2 20051207; AT E175450 T1 19990115; CA 2179097 A1 19961230; CA 2179097 C 20010123; DE 19523646 A1 19970102; DE 59601100 D1 19990218; DK 0751233 T3 19990830; DK 0751233 T4 20060418; ES 2128810 T3 19990516; ES 2128810 T5 20060616; GR 3029669 T3 19990630; US 5962116 A 19991005
DOCDB simple family (application)
EP 96109446 A 19960613; AT 96109446 T 19960613; CA 2179097 A 19960613; DE 19523646 A 19950629; DE 59601100 T 19960613; DK 96109446 T 19960613; ES 96109446 T 19960613; GR 990400753 T 19990312; US 66867596 A 19960625