3M 7850 Technical Data

Technical Data February, 2009

3M™Electrically Conductive Acrylic Pad (eCAP) 7850

Product Description

3M™ Electrically Conductive Acrylic Pad (eCAP) represents a breakthrough in electrically conductive PSA tape and

conductive gasket technology. 3M™ Electrically Conductive Acrylic Pad 7850, a double sided tape, consists of a high

performance 3M adhesive loaded with conductive fillers and is ideal for EMI/RFI shield and EMI/RFI gasket to metal

surfaces. The PSA matrix is filled with carbon fillers which allow thermal and electrical interconnection between

substrates through the adhesive thickness (the “Z-axis”) and also provides electrically conducting in the plane of the

adhesive (“X-Y Axis”). 3M eCAP 7850 is ideal for electrical and thermal bonding and ESD grounding of electronic and

electrical devices. 3M eCAP 7850 can be applied as die cut parts or in roll form and has good adhesion to common

EMI/RFI substrates such as aluminum, stainless steel, and smooth gasket materials. 3M eCAP 7850 also electrically

connects and mechanically bond EMI/RFI shield and gasket to metal frames and enclosures. The low contact resistance

and tape construction result in good EMI performance.

Patented Technology

3M™ Electrically Conductive Acrylic Pad 7850 is a self-stick EMI gasket pad or tape which provides good electrical

conductivity for EMI shielding and ESD grounding. Made with a proprietary technology, the pad achieves a unique filler

distribution in three dimensional structure throughout the adhesive matrix. This makes the tape an excellent choice for use

near electronic components and assemblies. The tape is supplied on 50 meter rolls in width 600 mm.

Product Construction

Product 3M™ Electrically Conductive Acrylic Pad 7850

Color Black

Adhesive Type Filled Acrylic

Filler Type Carbon particles

Adhesive Thickness* 0.15 mm

Release Liner (Face Side)

50 µm silicone treated PET film

Transparent and easy release

Release Liner (Back Side)

75 µm silicone treated PET film

Printed and tight release

*Contact your local 3M sales representative for additional information on thicknesses and width.

3M™Electrically Conductive Acrylic Pad (eCAP) 7850

Typical Properties

Note: The following technical information and data should be considered representative or typical only and should not be

used for specification purposes.

3M™ Electrically Conductive Acrylic Pad 7850

(2)

Product No. 7850 Test Method

Z-axis Resistance 1 inch x 1 inch 0.5 3M TM

Z-axis thermal impedance 0.07 °C-in.2/W 3M TM

Surface Electrical Resistance 10 / 3M TM

90° Peel Adhesion (FS) 1500 gf / inch 3M TM

90° Peel Adhesion (BS) 1500 gf / inch 3M TM

Compression Stress 14 kg / sq. in. 3M TM

Z-axis Resistance: Measured between gold plated brass probes with 1 kg load.

Contact area: 25.4 mm x 25.4 mm, Dwell time: 60 seconds.

Compression Stress: Measured at 25% compression (12 mm/min).

Sample

Probe (Gold Plated Brass)

25.4mm

1 kg

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