Imprint DIG process | Electroplating

DIG process

DIG process

Plating of direct immersion gold

Ever increasing electric components density and high frequencies of signal transmission require new concepts of final finishes in PCB manufacturing, too. By direct gold plating on copper (DIG) beside ISIG and EPIG a further process has been provided, which is free from nickel and has a high HF performance.

Due to its outstanding film characteristics DIG deposits are very well suited to withstand the higher requirements of PCB designers concerning fine pattern ability and high performance regarding soldering and wire bonding.

Electrolyte characteristics

Electrolyte type

Semi autocatalytic

Metal content

1.2 (1.0 - 1.4) g/l Au

pH value

7.2 (7.0 - 7.4)

Operating temperature

80 (78 - 82) °C

Deposition rate

0.15 μm / 20 min at 80 °C

Coating characteristics


Fine gold


99.9 wt %

Colour of deposit


Recommended thickness

0.1 - 0.3 μm


  • Nickel free coating
  • Deposits with high HF performance
  • Suitable for (ultra) fine pitch layouts
  • Ductile film compatible for flex PCB applications
  • Dense and homogenous gold protection layer up to 0.3 μm feasible
  • High solderjoint reliability (SJR) due to low void formation
  • Excellent Al-, Au-, Cu-(Pd coated) and Ag-wire bondability
  • Low plating cost due to few process steps


  • Flexboard PCB (FPC)
  • Multi-functional assembly
  • Fine pattern PCB design


  • Produktblatt-umicore-dig-en-screen-20190424.pdf

Your contact person

Markus Legeler

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

Find a representative in your region


      Umicore uses certain monitoring and tracking technologies such as cookies. These technologies are used in order to maintain, provide and improve our services on an ongoing basis, and in order to provide our web visitors with a better experience.

      By clicking on the "Accept all" button you agree to the use of these cookies while using the website. For further information regarding how we use cookies and other tracking technologies, please see section 11 of our website privacy notice

          Necessary cookies are essential and help you navigate our website. This helps to support security and basic functionality and are necessary for the proper operation of our website, so if you block these cookies we cannot guarantee your use or the security during your visit.

          Cookies that help us to understand the behaviour of users of our website. This allows us to continuously improve our website to provide the best information in support of our project aims. These cookies also help us understand the effectiveness of our website. For instance these cookies tell us which pages visitors go to most often and if they get error messages from web pages.

          Cookies that deliver content to you based on your interests, which are assumed from your browsing history. Most Targeting Cookies track users via their IP address and, thus, may collect some Personal Data. Personal Data collected by Targeting Cookies may be shared with third parties, such as advertisers.