TECHNOLOGY OF CHEMICAL PRECIPITATION OF GOLD COATINGS
AND SOLUTIONS FOR ELECTROLESS GOLD PLATING
Contact:
Innovation division
phone/fax: (+375 17) 2095303
e-mail:
www.fhp.bsu.by

Research Institute of Physical-Chemical Problems of the Belarusian State University  
Address: 14, Leningradskaya str.,220050 Minsk,
Republic of Belarus

 

Technical specifications: TS RB 100050710.056-2002

Purpose and area of application

The technology is used for chemical (catalytic) precipitation of thin gold coatings from stable adjusted solutions on a surface of articles of any form and different chemical nature with usage of a sublayer.

The technology and solutions can be used for:

  • printed circuit board
  • contacts in radio and electronic devices
  • frames of integrated circuits
  • clocks
  • medical tools, including needles of acupuncture
  • jeweller articles

    • Technical characteristics of coatings

  • thickness of coatings: 0,1-0,3 µm
  • exterior - brilliant or half- brilliant coatings of pure gold color
  • corrosion resistance - without occurrence of maculae and points of corrosion at tests in a hot chamber and moisture not less than 7 day
  • absence of exterior changes at storage during 7-10 years and more
  • capacity to ultrasonic bonding, soldering and repeated contacts similar to electrochemical deposited gold coatings with depth of 2-4 µm
  • uniformity and reproducibility of coating's depth: ± 0,05 µm
  • maintain intensive friction down to a full abrasion of gold without flaking-off and cracking; adhesion strength more than 1000 H/m (test for flaking-off)

    • Operating characteristics of solutions

  • used solutions are stable at storage a one year and more
  • adjusting of solutions is possible
  • deposition rate of gold ~2,5 µm/h
  • from 1 liter of solution it is possible to produce a gold coating by the area of 0,3-0,5 m2
  • solution temperature: 60-90 0C
  • concentration of gold compounds in recalculation on metal no more than 2 g/l

    • Advantages of the technology

  • simplicity of setting and equipment
  • technology is ecological secure (there aren't free cyanidum-ions
  • usage of chloride complexes of gold is possible
  • economy of gold is in 10 times in comparison with galvanic deposition without worsening of coating's properties

    • Usage

    The technology is protected by the patent of the Republic of Belarus N5520and implemented on "Integral" Plant (Minsk) and joint-stock company "Korall" ( "Module" Plant, Gomel)

    Forms of cooperation

    Sale of technology, sale of license, delivery of solutions

 
 
For additional information please contact us at:
phone: (+ 375 17) 2928342
fax: (+375 17) 2327183
e-mail:		 Ministry of Education for the Republic of Belarus