3M 1345 User Manual

1345 Tape

Embossed Tin-Plated Copper Foil

Data Sheet

Product Description

3M 1345 Tape consists of an embossed 1­ounce deadsoft tin-plated 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 reliabl e meta l- to-metal
contact between the backing and the
application substrate.

• Embossed deadsoft 1-ounce tin-plated copper
foil backing

• Conductivity “through the adhesive”

• Supplied on a removable liner for easy
handling and diecutting

Like all 3M shielding tapes, 3M 1345 is
available in standard and custom widths and
lengths. Standard length is 18 yards.

• Widths from 1/4” to 23”

• Longer lengths up to several times normal
length, dependent upon width. Check with
Customer Service.

Applications

3M 1345 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 tin plating on the copper foil
backing facilitates soldering and improves
resistance to oxidation and discoloration.

Shielding Effectiveness

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 1345 Tape, typical shielding
effectiveness (far field) is in the range of 75dB
to 95dB (30 MHz to 1 GHz).

Properties Typical Values

Backing thickness
Total thickness (backing plus adhesive) 4.0 mil (.101mm)
Breaking strength 1 25 lb./in (44 N/10mm)
Adhesion to steel 1 45 oz/in (4.9 N/10mm)
Electrical resistance through adhesive 2 0.001 ohm
Flame retardancy 3 Pass

* Footnote: 1. Test method ASTM D 1000

2. MIL-STD-202 Method 307 maintained at 5 psi (3,4 N/cm

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.

1

2

1.4 mil (0,04mm)

) measured over 1 in

2

surface area. The edges of the embossing pattern in the

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 whic h 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 lim ited to
the implied warranties of merchantability and fitness for a
particular purpose which warranties are hereby express ly
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, SPECIA L, INCIDENTAL OR
CONSEQUENTI AL 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 © 3M 1998

http://www.3m.com/elpd 78-8124-4709-8