Ⅰ.Introduction:

CP-842/CP-842R is a kind of traditional but very excellent palladium sulphate type of Accelerant Activator.Comparing with the products of their type on the market which damage to copper surface，Soldermask and base material resin etc, CP-842 is improved along with all the other problems in the activatory bath being resolved,such as copper ions concentration rising fast,cementation diffusion,Single-point revealing copper and heterochromia etc .

Ⅱ.Operation:

1. Make Up :

Pre-dip Bath : H2SO4（CP Class） ：8 ml / L
Activator Bath : CP-842（Make_up solution）：80 ml / L

2. Procedure :

Acidity:0.21± 0.05N
Temp: 28 ℃ (24 ~ 30 ℃)
Time: Pre-dip Bath: 1 min
Activator Bath :2min(0.5~3min)
Tanks material: PVC or PP
Heater: quartz. recommend use stainless steel with Teflon coating
Filtration: 5um filter core, 1~2 turn-over/hr.
Vibration: Air cylinder
Churning: shake
Rinse: 3 times by DI. water

3. Solution Maintenance:

1) regular addition: Pre-dip Bath: H2SO4﹕1~2 mL/ m2；Activator Bath :842R:8~15mL/m2

2) analysis and adjust： according to “CP-842 Analysis specifications”

3) Update: 4 M.T.O. or copper ions content above 350ppm