Technical Date | December 2021

3M™ Electrically Conductive Single-Sided Tape 3304BC-S
Product Description
3M™ Electrically Conductive Single-Sided Tape 3304BC-S is a single-sided conductive black foil tape that consists ofconductive black copper foil carrier and a patented* conductive non-woven carrier based acrylic adhesive. The uniquedesign of 3M tape 3304BC-S provides XYZ based conductivity for contact to small grounding areas, but also enhances
the physical properties of the tape for workability. 3M tape 3304BC-S provides electrical grounding performance andperformance for small size contacts.
3M tape 3304BC-S is an upgraded version of 3M™ Electrically Conductive Single-Sided Tape 3304BC with animproved surface scratch resistant black copper foil and continues to use the same high performance conductive
adhesive design with an optimized release liner design.
Note: *The 3M™ Electrically Conductive Single Sided Tape 3304BC-S is covered by US patents, please see
www.3M.com/patents for more details.

Features and Benefits
••••
•
•

XYZ-axis conductive through the adhesive
Scratch resistant black copper foil
Conformability and edge conformance
EMI/ESD Shielding performance
Overlap resistance and electrical contact on small areas
Handling and workability

Applications
3M tape 3304BC-S is typically used for applications requiring excellent electrical conductivity from the application
substrate through the adhesive to the foil backing and needs good electrical conductivity through the top of the foilbacking. Common uses include grounding and EMI shielding in equipment, components, and shielded rooms.

Product Construction / Materials Descriptions
Note: The following technical information and data should be considered representative or typical only and should not be
used for specification purposes.

Conductive Black
Copper Foil

Conductive Acrylic Adhesive
Polyester Release Liner

3M™ Electrically Conductive Single-Sided Tape 3304BC-S
Product Construction / Materials Descriptions
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 Single-Sided Tape 3304BC-S
Property

ValueColor

Matte blackBacking Type

Conductive black copper foil matrix (S-type)

Adhesive TypeAcrylic conductive non-woven (Ni/Cu) adhesiveRelease Liner

Silicone coated PET film

Note: The product is available in 500 mm x 100 meter. Contact your local 3M representative for more information.

Typical Physical Properties and Performance Characteristics
Note:

The following technical information and data should be considered representative or typical only and should not be used forspecification purposes. Final product specifications and testing methods will be outlined in the products Certificate of Analysis(COA) that is shipped with the commercialized product.

3M™ Electrically Conductive Single-Sided Tape 3304BC-S
Property

Value

TestThickness

45 um

ASTM D1000*

Adhesion to SUS

1300 gf/in

ASTM D1000*

XY-axis resistance of the backing

0.1 Ω

3M ETM-1**

Electrical resistance through adhesive

0.05 Ω

3M ETM-7****

Tested in accordance with ASTM D1000 test method.
** 3M test method: ETM-1 as described below.
*** 3M test method: ETM-7 as described on the next page.

**3M ETM-1 Test (XY-axis resistance of the backing)Prepare the tape strip in 25.4 mm width and place the adhesive side of the tape down on to a clean glass plate using
light finger pressure. Place the gold-plated block jig (250 g weight) onto the backing side of conductive tape, then startmeasuring the DC resistance between the electrodes with micro-ohm meter and record the resistance after 15 ~ 60
seconds.

3M™ Electrically Conductive Single-Sided Tape 3304BC-S***3M ETM-7 Test (XY-axis electrical resistance through adhesive)
Place a strip of the single (double) side conductive tape in 10 mm x 40 mm with adhesive side down between theelectrodes on 3M ETM-7 testing board. After initial hand lamination to provide for a 10 mm x 10 mm contact area
between the tape and electrodes, apply a 2kg rubber roller across the tape one time. Application method simulates atypical manufacturing process that might be used to apply the tapes to a surface. After 20 minutes of dwell time, theDC resistance between the electrodes are measured with a micro-ohm meter. The resistance results are recorded after
5 ~ 30 seconds for initial resistance.

Application Techniques
Note: Carefully read and follow the manufacturer’s precautions and directions for use when working with solvents. Tapeapplication below 10°C (50°F) is not suggested. Once properly applied, low temperature holding power is generally
satisfactory.

The bond strength of 3M tapes depends on the amount of adhesive-to-surface contact developed during applicationand substrate type and surface conditions.
1. Firm application pressure helps develop better wet-out and adhesive contact and may lead to improved bondstrength as well as electrical conductivity. Pressure must be applied to the bond area after assembly to ensuresufficient wet-out of the adhesive to the substrates and to engage the conductive acrylic adhesive fillers with thesubstrates to make electrical connection. Mechanical pressure (roller, metal bar) or finger pressure at 5-15 psi.
(Optimal application conditions are determined by a set of Design of Experiments (DOE) using a range ofapplication pressures, dwell time and temperatures (suggested initial range might include 5-15 psi, 2-5 seconds,
21°C-38°C).
2. Heat may be applied simultaneously with pressure to improve wetting, final bond strength and electricalconductivity. Suggested temperature range to evaluate is between 38°C-60°C.
3. To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified. Some typical surface
cleaning solvents are isopropyl alcohol or heptanes.

Storage and Shelf Life
The shelf life of 3M™ Electrically Conductive Single-Sided Tape 3304BC-S is 12 months from the date of manufacture
when stored in original cartons, in roll form, at 25°C (77°F) and 50% relative humidity.

Certificate of Analysis (COA)The 3M Certificate of Analysis (COA) for this product is established when the product is commercially available from3M. The commercially available product will have a COA specification established. The COA contains the 3M
specifications and test methods for the products performance limits that the product will be supplied against. The 3M
product is supplied to 3M COA test specifications and the COA test methods. Contact your local 3M representative forthis product’s COA.
This technical data sheet may contain preliminary data and may not match the COA specification limits and/or test
methods that may be used for COA purposes.
Final product specifications and testing methods will be outlined in the products Certificate of Analysis (COA) that isprovided once the product is approved by 3M for general commercialization and development work is completed.3M™ Electrically Conductive Single-Sided Tape 3304BC-S

Safety Data Sheet: Consult Safety Data Sheet before use.
Regulatory: For regulatory information about this product, contact your 3M representative.
Technical Information: The technical information, recommendations and other statements contained in this document are based
upon tests or experience that 3M believes are reliable, but the accuracy or completeness of such information is not guaranteed.
Product Use: Many factors beyond 3M’s control and uniquely within user’s control can affect the use and performance of a 3M
product in a particular application. Given the variety of factors that can affect the use and performance of a 3M product, user issolely responsible for evaluating the 3M product and determining whether it is fit for a particular purpose and suitable for user’s
method of application.
Warranty, Limited Remedy, and Disclaimer: Unless an additional warranty is specifically stated on the applicable 3M productpackaging or product literature, 3M warrants that each 3M product meets the applicable 3M product specification at the time 3M
ships the product. 3M MAKES NO OTHER WARRANTIES OR CONDITIONS, EXPRESS OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, ANY IMPLIED WARRANTY OR CONDITION OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR
ANY IMPLIED WARRANTY OR CONDITION ARISING OUT OF A COURSE OF DEALING, CUSTOM OR USAGE OR TRADE. If the3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M productor refund of the purchase price.
Limitation of Liability: Except where prohibited by law, 3M will not be liable for any loss or damage arising from the 3M product,whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract,
negligence or strict liability.

Electronics Materials Solutions Division
3M Center, Building 224-3N-11
St. Paul, MN 55144-1000
1-800-251-8634 phone
651-778-4244 fax
www.3M.com/electronics

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3M™ Electrically Conductive Single-Sided Tape 3304BC-S