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Electromagnetic interference shielding technology


12 PL 62AQ 3RHK

Last update

Wed, Feb, 27, 2013


Sat, Dec, 21, 2013


University from north-eastern Poland developed electromagnetic interference shielding technology. This technology can be used for manufacturing a variety of conductive plastic housings, with selected (application-dependent) types of thermoplastics and conductive additives. It can be used, for example, in hardware production or automotive. Scientists are interested in establishing scientific and technical cooperation or joint venture.


Electromagnetic interference (EMI) is a disturbance that affects an electrical circuit due to either electromagnetic conduction or radiation emitted from an external source. This interference usually degrades or limits the effective performance of such a circuit. The above phenomenon is of significant importance for a number of electronic industries, including: computers (especially laptop type), cell-phones, automotive electronics, medical and military equipment, aerospace industry, etc.
Therefore, most of electronic devices have to be properly EMI-shielded (e.g. according to the US FCC regulations), in order to ensure their proper functioning. EMI shielding is the process of limiting the penetration of electromagnetic fields by blocking them with a barrier made of a conductive material. Shielding is most commonly applied to enclosures separating electrical devices from "external world". EMI shielding can primarily be realized by means of two methods:
- extrinsic shielding: by application of sheet metals, metal foams or conductive paints (filled with metal powders), and
- intrinsic shielding: by application of the so-called intrinsically-shielded
thermoplastic materials (thermoplastics containing electrically conductive fillers)

Innovative Aspects:
Currently, an intrinsic method of EMI shielding accounts for ca. 5-10% of the global EMI shielding market (estimated at multi-billion US$ value). However, the market share for conductive thermoplastics significantly increases, as this method of shielding offers significant cost reduction opportunities. Conductive thermoplastics are usually manufactured by injection moulding of thermoplastic material (e.g. PC, PC/ABS blend, PA-nylon) with addition of electrically conductive filler (e.g. carbon fibre, metal fibre, metal-coated carbon fibre). These materials provide both superior mechanical properties, as well as EMI shielding levels comparable to those typically obtained by conductive paints or thin metal sheets (with shielding effectiveness on the order of 80-100 dB). Most importantly, shielding by conductive thermoplastics requires no further machining, plating, coating or other processing steps, which can reduce an overall cost by nearly 50%.

Technology Keywords

Composite materials;Plastics, Polymers

Keyword Codes:


Current Stage of Development

Development phase - Laboratory tested

Intellectual Property Rights

Secret know-how

IPR Comments:

Exploitation of RTD Results

Organisation/Company Type

Organisation/Company Size

Organisation Comments

Detailed Market Application Codes (VEIC)

MA Keyword

Computers;Transportation;Motor vehicles, transportation equipment and parts;Hardware, plumbing supplies

MA Keyword Codes:


Application Domain Description:

Collaboration Type

Joint Venture Agreement


- Type of partner sought: enterprises, consortium

- Specific area of activity of the partner: automotive or hardware production

- Task to be performed by the partner sought: joint testing, the use of the device developed in practice, finance of further development

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