GOLD COBALT ELECTROLYTE
AURUNA® 530 is a weakly acidic hard gold electrolyte with high current efficiency. Its essential property is its high resistance to abrasion and corrosion. By choosing advantageous operating conditions (pH-value and temperature), printed circuit boards can be treated in a way which is particularly friendly to resists and lacquers, thus avoiding the lifting of masking materials. With a gold content of at least 3 g/l, the desired high current efficiency can be reached even with sensitive resists. The plating speed is approx. 0.29 μm/min at 1 A/dm² and 35 °C.
Advantages
• Weakly acidic hard gold electrolyte based on
gold-cobalt with high current efficiency
• Good compatibility with resists, like dry film and soldermask
• Low contact resistance
• High abrasion resistance
• Good thickness distribution
• Easy maintenance and high stability of the electrolyte
• Low-pore layers with good corrosion resistance
Applications
• Contacts on plug-in cards
• Printed circuit boards
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ELECTROLYTE CHARACTERISTICS |
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COATING CHARACTERISTICS |
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Electrolyte type |
Weakly acidic |
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Coating |
Gold-cobalt |
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Metal content |
4 (3 - 6) g/l Au |
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Alloy composition |
99.7 wt.% Au |
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pH valuei |
4.0 (4.0 - 4.4) |
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Colour of deposit |
Yellow |
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Operating temperature |
35 °C |
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Brightness |
Semi-bright |
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Current density range |
0.8 A/dm² |
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Layer hardness |
approx. 170 HV |
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Plating speed |
0.1 - 0.5 μm/min |
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Density of the coating |
Approx. 18 g/cm³ |
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Anode material |
Pt-Ti (type PLATINODE Pt/Ti) |
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