The trend in electrical engineering to develop ever smaller, more powerful and more intelligent devices has been unbroken for years.
Until five years ago, the performance of today's smartphones was reserved for desktop computers. And modern motor control systems allow soft starts that would have been unimaginable in the past.
However, miniaturization also brings problems with it. On the one hand, the resulting heat loss must be dissipated efficiently in ever smaller spaces. On the other hand, signal lines and power lines are becoming increasingly similar.
This short distance naturally increases the risk of induction of currents or the propagation of electromagnetic interference fields. Particularly with sensor and control lines, such interference can cause incorrect information to be transmitted. In the worst case, high-energy, induced pulses can damage the input or output components of such signal lines. This happens above all when large loads are switched or the earthing is not carried out correctly.
In addition, the non-wired propagation of high-energy electric fields can interfere with other devices (EMC).
Various measures against these undesirable side effects have long been state of the art. Shielding is one of them, which is very efficient in many cases.
In principle, the aim is always to form a kind of "Faraday cage" that prevents either the propagation or the irradiation of electromagnetic waves. Materials such as iron and MU metals (especially H-fields) as well as aluminum and copper (E-fields) are used thanks to their characteristic properties.
CMC Klebetechnik's range of adhesive tapes therefore includes various copper and aluminium adhesive tapes as well as metallized woven and non-woven fabrics. Very good shielding effects can already be achieved with these comparatively thin and sometimes very light and flexible adhesive tapes.
A plastic housing (due to the design) can be shielded from the inside at the most important points (EMC measurement) with foil stampings made of Al or Cu. And entire rooms are equipped with fleece or fabric adhesive tapes which, in addition to their very good shielding effect above 80dB (10 - 2000 MHz), are particularly notable for their air permeability and low weight.
If necessary, die-cut parts made of copper and aluminum foil can also be insulated on one and both sides. This prevents short circuits between earth (ground) and, for example, the underside of a circuit board. A protruding insulation edge maintains the prescribed clearance and creepage distances.
Most EMC shielding materials from CMC Klebetechnik are equipped with a highly conductive adhesive. This means that the shielding components do not necessarily have to be contacted by soldering, clamping or crimping, but can be connected simply by gluing. This makes assembly considerably easier and in many cases replaces much more complex measures.
Just ask the adhesive tape specialists at CMC Klebetechnik GmbH
Die-cut parts for EMC shielding