Gobright® TLA-77 Gold Electrolyte

Immersion gold electrolyte for ENIG

Gobright® TLA-77 is a special neutral immersion gold electrolyte. It is suitable for ENIG plating on PCB and ceramic substrates. The gold concentration in the electrolyte is just 0.4 g/l. This means a dramatically cost saving potential by reducing dragout gold volume. This process also has excellent solder joint characteristics due to its lower corrosion attack on electroless nickel.

The electrolyte needs one concentrate for make up and an additional component for replenishment.

Electrolyte characteristics

Electrolyte type

Displacement type

Metal content

0.4 (0.2 - 0.6) g/l Au

pH value

7.2 (7.0 - 7.4)

Operating temperature

80 (75 - 85) °C

Plating speed

0.065 μm/10 min at 80°C

Coating characteristics


Fine gold


99,9 wt.% Au

Colour of deposit

Lemon yellow


  • Easy maintainance due to displacement process
  • Very low gold content
  • Lemon-yellow appearance
  • Minimized corrosion attack on electroless nickel


ENIG plating on PCB and ceramic subtrates used for

  • Consumer electronics
  • Automotive industry
  • Industrial electronics
  • Telecommunications

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Questions about the product?

Markus Legeler

+49 7171 607 204

For inquiries and additional information
please contact

Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970
Email: chemistry@umicore.com
Website: www.chemistry.umicore.com

The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.