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AURUNA® 5000 Fine Gold Electrolyte

AURUNA® 5000 Fine Gold Electrolyte

Fine gold coatings with very good bonding and soldering properties

AURUNA® 5000 is a neutral fine gold electrolyte for the deposition of matt yellow, fine crystalline gold coatings. It is designed for use on flexible printed circuit boards, but can also be used without any limitations on rigid substrates.

AURUNA® 5000 coatings have a fineness of over 99.95% and a hardness of 70 - 85 HV 0.025, which means they comply with the ASTM B488 - 01 Type III Code A/B classification.

The printed circuit boards are plated in a matt nickel bath before gold plating, pre-gold plated and then coated with AURUNA® 5000. The result is gold layers with excellent bondability and solderability, high ductility and low electrical resistance.

The electrolyte is extremely easy to handle and is characterised by impressive longevity.

Electrolyte characteristics

Electrolyte type

neutral

Metal content

6 (5 - 9) g/l Au

pH value

6.0 (5.8 - 6.2)

Operating temperature

65 (62 - 68) °C

Current density range

0.3 (0.1 - 0.5) A/dm²

Plating speed

approx. 0.17 μm/min at 0.3 A/dm²

Coating characteristics

Coating

Fine gold

Purity

> 99,95 % Au

Colour of deposit

matt yellow

Hardness of deposit

≤ 85 HV 0.025, (≤ 90 HK 0.025)

Advantages

  • High power yield
  • Resist-friendly operating conditions
  • Excellent bondability and solderability
  • Low hardness, low contact resistance
  • ASTM B488 - 01 Type III Code A/B
  • Easy handling
  • High longevity

Applications

  • Flexible and rigid printed circuit boards

Downloads

  • Produktblatt_AURUNA_5000_EN.pdf

Your contact person

Markus Legeler

Markus Legeler

Manager Sales International
T: +49 7171 607 204
F: +49 7171 607 316
Email

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