NANO-FINISHING

SURFACE REFINEMENT FOR SMT STENCILS

Nanoscale printing stencils have a much lower contamination propensity compared to other types of stencil.

Even delicate stencil structures can be printed stably and reliably over a large number of printing processes without having to clean the stencil.

NANO-CUT PRINTING STENCILS

Photocad has a state-of-the-art system for the automatic coating of printing stencils.

The nano-refinement process of SMT stencils is an effective and cost-efficient application that provides additional protection against contamination and thereby significantly increasing the service life of the stencils.

Even delicate stencil structures can be printed stably and reliably over a large number of printing processes without having to clean the metal stencil. 

With the help of nano-cutting, the SMT stencil will be sealed and thereby resilient to dirt particles, solvents and alkaline cleaners.

HOW DOES NANO TECHNOLOGY WORK?

Phase 1
On application, the nano particles move freely on the substrate.

Phase 2
The nano particles settle into an organized structure during the reaction period.

Phase 3
The surface is now bonded with the nano particles and is thus protected.

LATEST TECHNOLOGY

Photocad has its own state-of-the-art coating facility that is automatically controlled.

This guarantees precision, repeat accuracy and the highest level of occupational safety for our employees. The in-house refining capacity enables us to deliver high-quality, nano-coated SMD stencils quickly and cheaply.

In addition, Photocad uses high-quality nano-silicon, which is much more durable and environmentally friendly than nano products made from polymer or silicon.

Untreated surface
Nano-refined surface

ADVANTAGES OF NANOTECHNOLOGY

  • Once it is cured, nano finishing is extremely resilient in terms of its chemical and mechanical make-up, and is heat-, frost- and UV-resistant.
  • Surface strength and scratch resistance are significantly improved, so much so that mechanical wear and tear, as caused by normal use, shows almost no effect. Harsh environmental influences also have no negative impact.
  • Once it has been cured, nano finishing is completely non-hazardous, pH-neutral and problemfree. When proper processing and curing of the nano-finished surfaces is carried out, no risk is posed to health.
  • The images to the right show how water behaves on an untreated surface and on a surface that has been treated with nano technology.
  • The droplets behave very differently on the two surfaces: The treated surface repels fluids far better, thus reducing the likelihood of impurities adhering to the surface.

THE LOTUS EFFECT

Surface finishing with nano technology was inspired by nature. The most famous example of this is the lotus effect. Water rolls off the lotus in droplets and picks up dirt particles, removing dirt from the surface. The water droplets have almost no contact with the surface. The double- structure of the leaf’s surface is responsible for this effect. This phenomenon was recreated by scientists and then exploited technologically.

Water behaviour on an untreated surface.
Water behaviour on a lotus leaf.
Water behaviour on a surface treated with nano technology.

COMPARISON OF NANO PRODUCTS

PROPERTIES

Wear resisitance
Alkali resistance
Easy to claean
Long life cycle
Environmentally friendly
Washing system compatible

Photocad NANO SILICON COATING

Very good
Yes
Excellent
Very good
Very good
Yes

POLYMER PRODUCTS

Little to none
Low
No
No
Low
Only slightly or not at all

FAQ

Is a nano-coating suitable for all SMT stencils?

This form of surface refinement is particularly suited for the smallest components and demanding applications. Therefore, we offer nano-refinement for PERFORMANCE (product line) SMT stencils. Additionally, we carry out electro-polishing as an additional refinement.

Which cleaning agents are recommended for caring for coated materials?

Photocad offers a large selection of the KIWOCLEAN EL product line – these have been specially developed for cleaning and caring for coated SMT stencils.

Which quick mounting system is recommended for nano-coated stencils?

Photocad offers two quick mounting systems for SMT stencils: Quattro-Flex and VectorGuard. Both systems are suitable for nano-coated stencils.