Concentration Monitor for Dimethylamine Borane
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
The concentration of dimethylamine borane (DMAB), a reducing agent used for electroless plating of nickel, gold, palladium or silver, can be determined by detecting the peak current between a rotating platinum disk electrode and reference electrode in a plating bath. Referring to Fig. 1, rotatable holder 1 carries platinum disk 2 that is a test electrode submersed in electroless plating bath formulation in inert cylinder 3. Bath formulation flows continuously through cylinder 3 via inlet 4 and outlet 5. Reference electrode 6 is a saturated calomel rod, and a piece of foil 7 serves as a counter electrode. Programmer 8 controls voltage source 9 that is connected among test electrode 2, reference electrode 6 and counter electrode 7.