FAQ

FAQ

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Do I have to change my screen printing parameters when I use GenesInk nano-silver inks?

  • Standard mask works well with Smart Screen product. Depending on your requirements, screen printing mask has to be adjusted. You can find examples on the TDS. GenesInk team provide printing support and share printing conditions to help customers to use our products in the best way.

Do I have to adjust the ink before printing?

  • We have adjusted our formulas to be adapted to each printing processes. No need to modify the ink prior to printing. You can contact us for specific demands.

How can we clean the ink on the screens, printheads or pipe system ?

  • GenesInk has developed cleaning solutions dedicated to each ink avoiding risk of chemical reaction with nanoparticles. We highly recommend using our cleaning solution to increase your printer shelf life.

Do I need to use specific precautions when using a nano-material ink?

  • There are no dangers related to nanoparticles inhalation. Indeed, there is no risk of particle release in atmosphere as long as nanoparticles are in a wet media. Once printed and cured, particles are sintered and therefore no longer nano sized. The use our products require standard personal protective equipment (PPE) for chemical products. For more details, please refer to the MSDS.

Does the silver coating have to be protected?

  • Silver can get oxidized. To avoid that, we recommend printing a protection layer on top of the silver layer. We have developed a specific product called ProtectInk S (P-ID21001) allowing to avoid oxidation and scratches of the silver. No electrical modifications after 1 000h at 85°C/85%RH of the silver when protected with this product.

What is the difference between GenesInk nano silver inks and polymer silver pastes?

  • The main difference come from the particles size. Thanks to the nano size, the electrical performances of GenesInk solutions are 10 times better than silver pastes. It helps reducing consumption of raw materials and decrease the cost of printed electronic production (total cost of ownership).
  • GenesInk conductive nano-silver inks provide:
    • Unrivaled conductivity
    • Unbeaten ease of process
    • Low temperature curing
    • Ease to clean
    • CMR free (no toxic components)

What are the differences between Smart Screen F S-CS21303 and Smart Screen R S-CS21306?

  • S-CS21303 is our standard screen-printing formula. This ink has been designed to provide high conductivity (resistivity down to 2.5 µOhm.cm) and has a lower viscosity. This ink should be used to obtain lines width > 80 microns.
  • S-CS21306 has been designed for application requiring high resolution (down to 40 µm line width). This ink should be used to obtain line width < 80 µm. For more details, please see the associated TDS.

What is the finest line width I can achieve?

  • 40 µm line width can be achieved by screen printing using our Smart Screen R ink. For more details, please see the associated TDS.

What is the minimum bending radius supported by printed samples?

  • There is no variation of electrical performances observed after bending down to 2mm of bending radius.

Your Optomec ink is UA or PA ink?

  • It is PA ink.

How can components be placed on the silver layer?

  • We recommend using a conductive glue.
  • There are two types of conductive glue used with our inks :
  • Anisotropic adhesive – DELO MONOPOX AC245 – (datasheet)  for complex component footprint
  • Isotropic adhesive – DELO DUALBOND IC343 – (datasheet)  for basic component

 

  • Solder is possible in specific conditions.

How do printed samples of Smart Screen behave under high humidity and temperature?

  • Durability tests were performed on printed sheets of Smart Screen F S-CS21303. Samples were left at 85°C and 85% humidity for 1000 hours and showed no changes in resistivity, adhesion and appearance.

How can I decrease the viscosity of inkjet ink CS01130?

  • Viscosity of ink can be decreased by heating the printhead up to 35°C. The viscosity of CS01130 heated to 35°C will decrease from 12,5 mPa.s to 7 mPa.s.

What is the recommended sintering temperature of ZnO/AZO inks for screen and ink jet printing?

  • Each ZnO/AZO ink can be dry with the same conditions.
  • We recommend drying inks between 80°C and 120°C during 5mn or 10 mn depending on the drying temperature.

What is the semiconductor type of the ZnO?

  • The ZnO is a N type semi-conductor.

How can I improve the conductivity of a ZnO layer?

  • Improvement of the conductivity of ZnO if annealed at a temperature >180°C

What are the optimal drying and curing conditions of spray ink H-SZ01034?

  • A pre-drying at room temperature must be done before annealing to avoid the migration of solvents that have too different boiling point temperatures

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