Accueil - Technologies - Custom PCBs

Planar transformers

What is a planar transformer?

Planar transformers are transformers used in isolated switch mode power supplies operating at high frequency. The transformers consist of stacked turns of copper foil (105µm or 210µm thick foil) connected to each other using multilayer technology. The planar transformer PCB designer increases the power of this type of PCB. The circuit range can be up to 24 copper layers depending on the design.

Examples of PROTECNO planar transformer implementation:

  • 210mm 22-layer internal copper planar
  • Integrated planar
  • Integrated planar
  • 18-layer planar
  • Planar integration on PCB
  • 16-Layer planar (polymide and kapton)

Examples of use:

  • Switching power supplies
  • Electric vehicles
  • Defence
  • Aeronautics, Avionics and Aerospace
  • Industrial power systems
  • Solar inverters, wind turbines


What is a Backplane?

A backplane, also called a backplane PCB, is used to form a computer bus connecting several PCBs together and is usually used for test bench applications and, in most cases, it serves as an interconnection between PCBs without containing active components. It does, however, incorporate a wide variety of functionality.

Backplanes can be used for control and system reliability in industrial, computer and military applications.

The backplane consists of press-fit connections that are inserted by normal force and are necessary for the subsequent integration of connectors. These operations require a mastery of the drilling tolerances of the finished holes to +/- 50µm for the PCB manufacturer.

Examples of PROTECNO backplane implementation:

Examples of use:

  • Aeronautics
  • Defence
  • Bench testing

Metal cavities and baseplates

The baseplates are available in 3 materials: copper, aluminium, and brass.

  • Colaminated PTFE on copper baseplate
  • RO4350 substrate on a 2.5mm thick copper baseplate

For further information, please contact us