AURUNA® 5100 is a neutral fine gold electrolyte for depositing matt, lemon-yellow coatings. It's specifically developed for applications requiring excellent bonding and...
Pure gold coatings with very good bonding and soldering properties
AURUNA® 5100 is a neutral fine gold electrolyte for depositing matt, lemon-yellow coatings. It's specifically developed for applications requiring excellent bonding and soldering properties.
In addition to good ductility, the layers from AURUNA® 5100 also exhibit a low hardness and a low contact resistance. Even under production conditions, the layers have a high gold purity of 99.99 wt. % Au.
The coatings meet the requirements of ASTM B488-01, Type III, Code A/B.
Electrolytes Characteristics
| Electrolyte type | Neutral |
| Metal content | 5 (4 - 8) g/l Au |
| pH value | 6.0 (5.8 - 6.2) |
| Operating temperature | 65 (60 - 70) °C |
| Current density range | 0.2 (0.1 - 0.5) A/dm² |
| Plating speed | Approx. 0.13 μm/min at 0.2 A/dm² |
| Anode material | Pt-Ti (type PLATINODE® Pt/Ti) |
Coating Characteristics
| Coating | Fine gold |
| Purity | 99.99 wt.% Au |
| Colour of deposit | Lemon-yellow |
| Brightness | Matt |
| Hardness | 85 HV |
| Density of the coating | Approx. 19 g/cm³ |
Advantages
- Neutral electrolyte for pure gold coatings with very good thickness distribution
- High current efficiency
- Resist-friendly operating conditions
- Excellent bonding and soldering properties
- Low contact resistance
- Classification according to ASTM B488-01 Type III, Code A/B
- Compatible with standard BGA requirements
- Easy maintenance and high stability of the electrolyte
Applications
- Rigid and flexible printed circuit boards
- Semiconductors
- BGA applications
- Ceramic and metallic substrates
