MAR PD-70C crystal is dissolved in water and used as a pre-dip prior to the MAR CT-74 ACTIVATOR. This low acid solution prepares the substrate surface for uniform absorption of the palladium activator while minimizing copper attack of the inner layers of multi-layer panels.
|MAR PD-70C||125 g/l|
After addition of MAR PD-70C, analyze the normality and adjust as required.
6.75 ml/l of hydrochloric acid will increase normality by 0.01. Maintain normality in the range of 0.20 to 0.25N.
The MAR PD-70C solution should be discarded when 500 surface square feet of boards are processed per gallon of made-up solution or when copper reaches 1 mg/l.
|MAR PD-70C||100 – 130 g/l||125 g/l|
|Normality||0.20 – 0.25 N||0.22 N|
|Temperature||20°C||20 - 25°C|
***Analysis to be done daily***
|Tanks:||Polypropylene, HD Polyethylene, PVC|
|Heaters:||Teflon, Teflon coated SS, Quartz|
|Filtration||Recommended. Continuous filtration through a 10 micron polypro filter tube is advisable at 3 to 4tank volume turnovers per hour.|
|Agitation:||Recommended. Work rod agitation to maximize movement of solution through holes is recommended. DO NOT USE AIR AGITATION!!|
|Vibration:||Recommended for small hole and high aspect ratio boards.|
Maintain between 125 g/l