-- The Home Page of the Finishing Industry

on this site
current topics
The world's most popular metal finishing site, and the internet's friendliest corner

topic 17825

Setting up Electroplating Bath


I am currently setting up an experiment to electroplate a pattern in photoresist on fused silica wafers. The electroplated metal will be used as a mask, and therefore needs to fill in the grooves, but does not need to have a perfect level finish. I was wondering if anyone had advice for setting up a bath: power supply, electrodes, plating solutions, additives, etc. I will probably be trying different metals: currently Cu or Ni, and also need to know what type of seed layer is preferred.

Julie Jay
- Waitsfield, Vermont, USA


You are actually setting up something very similar to an electroforming process, so you will need a low stress electrolyte with good throwing power. The power supply will be dependent on the size of the workpiece, but tank filtration is critical for good replication. I would personally recommend up to 10 tank turnovers per hour and careful electrolyte composition control. Depending on the size of your pattern you may need a clean room type environment - if you are replicating grooves of 10um, you don't want a 20um particle landing on the pattern as it will destroy the replica. The best metals for this work are probably nickel or copper; preferably based on nickel sulphamate and copper cyanide respectively. If you are rich, you can use silver or gold cyanide solutions.

trevor crichton
Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.