PCB
MAR AC-77
MAR AC-77 Accelerator is a non-fluoride product. It enhances catalyst activity on glass and dielectric materials. It provides a void free and reliable electroless copper deposit.
Advantages of the MAR AC-77 process include:
- Optimal catalytic activity
- No palladium dissolution
- Sulfate based solution
- Excellent glass coverage
SOLUTION MAKE-UP
| DI Water | 90% |
| MAR AC-77 | 10% |
SOLUTION MAINTENANCE
The AC-77 Accelerator processes approximately 500 surface square feet per USG. Solution should be discarded when either throughput reaches 500 ssf/USG or when the copper metal reaches 2,000 ppm (2g/l).
| Palladium | 10 ml/litre of ENAU PDS will increase Pd content by 10 mg/l |
| Normality | 10 ml/litre of Sulphuric acid s.g. 1.84 will increase the Normality content by 0.36 N |
OPERATING PARAMETERS
| Range | Optimum | |
| MAR AC-77 | 8 - 12% | 10% |
| Temperature | 20 - 32°C | Ambient |
***Analysis to be done daily***
EQUIPMENT
| Tanks: | Polypropylene, HD Polyethylene, PVC |
| Heaters: | Teflon, Teflon coated SS, Quartz |
| Ventilation: | Required. |
| 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. |
ANALYSIS OF MAR AC-77
- Reagents Required
- 1.0 N Sodium Hydroxide
- Cresol Red Indicator Solution
- 250 ml. Erlenmeyer Flask
- 50 ml. burette
- 10 ml. pipette
- Method
- Pipette 10 ml. of the working solution into the Erlenmeyer Flask.
- Dilute to 100 ml. with de ionized water.
- Add 2 drops of Cresol Red indicator solution.
- While stirring the solution, titrate with 1.0 N sodium hydroxide to a violet colour endpoint.
- Calculation
- % MAR AC-177 = (ml. NaOH) x (Normality of NaOH) x 1.67
Maintain between 8-12%M
Request Technical Information Sheet