Electrically conductive metallisation 3838

For higher EMI/RFI-shielding demands and larger quantities we can sputter a fully metal, electrically conductive coating onto 90% of all commonly used plastics, including even PTFE. The metallisation is applied in the form of a sandwich of three thin layers of metal.

Elektrically conductive metallisation 3838

Sputtering is a technique used to create a thin layer of metal on a part made out of synthetic material. This technique is used for protective coatings that meet extremely high standards.

The process takes place in a high-vacuum chamber, in which argon is brought to a pressure of about 5E-3 mbar. On one wall is sputtered material that should be, this is the so-calledtarget. Opposite the substrate. This is the material the sputtered material to be made​​.On the target is an applied voltage of around-500V. With these pressures in an argonplasma of such positive ions, these ions move visibility into the negatively chargedtarget, the collision with the target material are released and move to the other side fails.After a certain time has a thin layer. Sputtering is faster when the target behind amagnet. The magnetic field creates an electronic track with a round (or oval) forms in thetarget erosion pattern. Not even metals can be sputtered instead of a DC voltage is anRF voltage is used (usually 13.65 MHz). Sometimes it can / should be a gas (along withargon) to create the desired layer. This is called reactive sputtering.

By this metal ion bombardment melting the metal particle as it were, into the plasticwithout being affected. And a high degree of adhesion is the result.

First a thin layer of stainless steel, to prevent the softeners in the plastic affecting the shielding. Secondly a thin layer of copper for superb shielding performance. And thirdly another layer of stainless steel to avoid corrosion.

It is also possible to only metallize a part of your plastic housing. That we call selective metallization.


Conductive metallisation applications

  • Shielding/Screening (EMI, RFI)
  • To meet EMC standards
3838 series Conductive metallisation
3838 series Conductive metallisation

Conductive metallisation shielding performance

Frequency (Mhz) Attenuation (dB)
30 50
100 58
200 70
500 74
700 72
900 70
These values are measured under laboratory conditions.
In your situation results may differ, please read our Guarantee.

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General documentation

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