JHC offers a wide range of conductive tapes and associated laminates to provide an economic EMI shielding solution for a variety of applications.
Copper tape (plain, tin plated, embossed)
Conductive fabric tape (nickel plated fabric)
Laminated aluminium or copper with a PVC layer.
All tapes have a conductive adhesive.
EMI Shielding Foil and Fabric Tape with Conductive Adhesive
Parker Chomerics CHO-FOIL® metal foil tapes provide an economical solution to applications requiring excellent electrical conductivity across substrates. These foil tapes can provide a low impedance connection between a braided cable shield and the metal connector backshell in molded cables. Due to the highly conductive pressure sensitive acrylic adhesive (PSA), the tape can provide an effective shielded cable assembly without the need for soldering the tape to the braid. The uniform dispersion of unique, oxidation-resistant conductive particles in the acrylic PSA produce a very low resistance through the tape. Thus, wrapping a cable assembly with the foil tape, using a slight overlap, can provide an effective prototype cable shielding system. Seams of EMI shielded rooms and other shielded test enclosure setups are more easily sealed with CHO-FOIL tape so as to provide electrical continuity and thus higher shielding effectiveness. Double-sided conductive adhesive is available to ensure leak free seams. The use of CHO-FOIL tape can ensure good electrically conductive mating flanges and corrosion resistant grounding areas. For applications requiring lighter weight and a more flexible electrically conductive tape, the electrically conductive fabric tape, CHO-FABTM, will provide excellent shielding and good corrosion resistant performance. In the case of shielded cables, CHO-FAB is very conformable, strong, lightweight, and doesn’t have sharp edges that are present on metal foil tapes.
Conductive Foil Tape with Peel-Off Mask for Cabinet Painting Operations
The CHO-MASK® II family of EMI foil tapes includes both Standard Tack (ST) and High Tack (HT) versions for providing a conductive, non-corroding surface on painted metal electronic enclosures. CHO-MASK II tapes consist of recessed polyester paint masking film covering a layer of either 1 oz. (28.4g) or 2 oz. (56.7g) tin-plated copper foil. The back of the foil features a conductive pressure sensitive adhesive (PSA). CHO-MASK II tape is applied to clean metal frame, door and panel surfaces where electrical continuity is required. After painting, the peel-off mask is easily removed, allowing the paint to seal both edges of the foil layer. The foil imparts a clean, electrically conductive path from the panel, through an EMI gasket, to the cabinet frame. It also provides grounding points within the enclosure.
CHO-STRAP® grounding straps are flexible, double-insulated laminates of copper (inside) and polyester film (outside), with punched and tinned ends to facilitate termination. They provide low-impedance ground paths, thereby reducing radiated EMI problems caused by ordinary wire grounds. They are generally more cost-effective than braided ground straps.