Slot application is a printing technology, in which the solution is distributed on a substrate by dosing through a special slotted head. Print quality is determined by several variables: the size of the slot, the speed of the head, the speed of the printed matter and its viscosity. The operation of a sheet printer can be affected by various defects while printing such as dripping of printed matter, air capturing, start and stop of printing cycle. Sheet printing process must be controlled all the time, otherwise the shape of patterns on the substrate can be changed due to edge effects. This printing method is difficult to use for printing electronics on flexible substrates.

This printing method is favorable to use for large area application, although it is difficult to get structures with high resolution. That is why this method is appropriate to use for light emitting diodes and large-area solar cells.


Advantages of sheet printing

  • - large area coatings;
  • - high thickness uniformity;
  • - high thickness uniformity;
  • - non-contact technology; can be applied on any type of substrates - polymer, glass, metal, etc.;
  • - wide range of dosed materials; possibility to apply pastes with viscosity from several mPa * s to several thousand Pa * s;
  • - utilization of dosed materials (small amount of waste);
  • - scalability: sheet printing can be used for R2R printing.

Disadvantages of sheet printing

  • - High cost to prepare a new production line. Different dimensions or change of patterns require new nozzles with a different shape of a hole and / or partitions.