EP 0016415 B1 19840613 - METHOD FOR MEASUREMENT AND REGULATION OF THE CONCENTRATION OF COPPER, FORMALDEHYDE AND SODIUMHYDROXIDE IN AN ELECTROLESS COPPER DEPOSITION BATH AND SAMPLING APPARATUS FOR USE IN THIS METHOD
Title (en)
METHOD FOR MEASUREMENT AND REGULATION OF THE CONCENTRATION OF COPPER, FORMALDEHYDE AND SODIUMHYDROXIDE IN AN ELECTROLESS COPPER DEPOSITION BATH AND SAMPLING APPARATUS FOR USE IN THIS METHOD
Publication
Application
Priority
DE 2911073 A 19790321
Abstract (en)
[origin: US4286965A] A control apparatus for automatically controlling at least the concentration of copper-ions, hydroxyl-ions and formaldehyde-ions in an electroless copper plating bath and independently analyzing, displaying and replenishing the concentration of each such ions whereby a sample for each of the ions is discontinuously removed from the plating bath and diluted with a specific amount of water and, independently of one another, the copper-ion concentration is colorimetrically analyzed, displayed and replenished as needed, the hydroxyl-ion concentration is potentiometrically analyzed, displayed and replenished as needed and the formaldehyde-ion concentration is amperometrically analyzed, displayed and replenished as needed.
IPC 1-7
IPC 8 full level
C23C 18/40 (2006.01); G01N 27/26 (2006.01); G01N 27/416 (2006.01); G01N 31/16 (2006.01)
CPC (source: EP US)
C23C 18/405 (2013.01 - EP US); Y10T 436/12 (2015.01 - EP US)
Designated contracting state (EPC)
BE FR GB NL
DOCDB simple family (publication)
EP 0016415 A1 19801001; EP 0016415 B1 19840613; DE 2911073 A1 19801002; DE 2911073 C2 19840112; JP S55128572 A 19801004; JP S6318664 B2 19880419; US 4286965 A 19810901
DOCDB simple family (application)
EP 80101281 A 19800312; DE 2911073 A 19790321; JP 3599380 A 19800321; US 12537480 A 19800228