Process and programmable computer controlled system for...

Details Process and programmable computer controlled system for... Process and programmable computer controlled system for...

C - Chemistry, Metallurgy

23

C

C23C 18/40 (2006.01) C23C 18/16 (2006.01)

Patent

CA 2052931

501-175 PROCESS AND PROGRAMMABLE COMPUTER CONTROLLED SYSTEM FOR ELECTROLESS COPPER PLATING ABSTRACT OF THE DISCLOSURE A process is provided for maintaining the level of cyanide ion stabilizer in an electroless copper plating bath held at a constant predetermined temperature by making additions of predetermined amounts of cyanide ion feedstock at predetermined time intervals. The properties of the copper layer deposited on a substrate by means of the system are significantly improved in uniformity and structural strength. In addition, The plating rate and stability of the bath are far more uniform. A programmable computer system for controlling the process of the invention is also described.

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