1245 Tape Embossed Copper Foil Data Sheet Product Description Applications 3M 1245 Tape consists of an embossed 1ounce deadsoft copper foil backing and an aggressive pressure-sensitive acrylic adhesive. The edges of the embossed pattern pressed into the foil cut through the adhesive layer to establish reliable metal-to-metal contact between the backing and the application substrate. 3M 1245 Tape is typically used for applications requiring excellent electrical conductivity from the application substrate through the adhesive to the foil backing. Common uses include grounding and EMI shielding in equipment, components, shielded rooms, etc. The copper foil backing is solderable and resists oxidation and discoloration. • Embossed deadsoft 1-ounce copper foil backing • Conductivity “through the adhesive” • Supplied on a removable liner for easy handling and diecutting Shielding Effectiveness • Widths from 1/4” to 23” • Longer lengths up to several times normal length, dependent upon width. Check with Customer Service. Many factors determine the true shielding effectiveness of a shielding tape, including type and thickness of foil, adhesive type, intimacy of contact, smoothness of application surface, strength and frequency of the EMI signal, etc. However, using standard tests and fixtures, it is possible to determine a value for the attenuation. For 3M 1245 Tape, typical shielding effectiveness (far field) is in the range of 75dB to 85dB (30 MHz to 1 GHz). Properties Typical Values Like all 3M shielding tapes, 3M 1245 is available in standard and custom widths and lengths. Standard length is 18 yards. Backing thickness 1 1.4 mil (0,04mm) Total thickness (backing plus adhesive) 4.0 mil (.101mm) Breaking strength 1 25 lb./in (44 N/10mm) Adhesion to steel 1 35 oz/in (3,8 N/10mm) Electrical resistance through adhesive Flame retardancy 3 2 0.001 ohm Pass * Footnote: 1. Test method ASTM D 1000 2. MIL-STD-202 Method 307 maintained at 5 psi (3,4 N/cm 2) measured over 1 in2 surface area. The edges of the embossing pattern in the foil backing penetrate through the nonconductive adhesive to make metal-to-metal contact with the application substrate. 3. UL-recognized for flame retardancy per UL 510, Product Category 0ANZ2, File E17385. 3M is a trademark of 3M. Important Notice All statements, technical information and recommendations related to the Seller’s products are based on information believed to be reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use. Any statements or recommendations of the Seller which are not contained in the Seller’s current publications shall have no force or effect unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all warranties, expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose which warranties are hereby expressly disclaimed. SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER’S PRODUCTS THAT WERE DEFECTIVE. Electrical Products Division 6801 River Place Blvd. Austin, TX 78726-9000 800 676 8381 http://www.3m.com/elpd © 3M 1998 78-8124-4707-2