8904-025

Technical Data May 2014 3M™ Thermally Conductive Adhesive Tape 8904 Product Description 3M™ Thermally Conductive Adhesive Tape (TCAT) 8904 are 0.20mm, 0.25mm, and 0.50mm thick pressure sensitive adhesive tapes filled with thermally conductive ceramic particles, and flame retardant fillers. This product is designed to have good converting ability, handing and re-workability through the introduction of a thin PET carrier. TCAT 8904 is designed with a soft acrylic polymer and multiple thickness options to allow excellent wet-out or conformability to many surfaces. The tape has good adhesion performance to many substrate types and has excellent dielectric performance. 3M 8904 is a hybrid TCAT that offers a greater thickness range than the 3M TCAT thermal tape 8820 (maximum 0.5mm thickness), and has thickness options similar to the 3M™ Acrylic Thermal Pads, such as the Acrylic Thermal Pad 5570, but with higher adhesion performance that allow additional design and assembly flexibility. Product Uses This product can be used for heat management in electronic devices and for general heat dissipation in devices. This product may also be used for bonding/joining parts in electronic products. Key Features •  Good thermal conductivity (>1.5W/m-K) •  Excellent dielectric performance •  Low thermal impedance •  Good and reliable adhesion performance to Al and SS •  Vibration damping Product Construction Product Adhesive Type Soft Acrylic Adhesive Tape Thickness 0.20mm / 0.25mm / 0.50mm Tape Color White (slightly grey dotted) Filler Type Ceramic Particle Product Liner 75 µm PET Liner Roll Length 3M™ Thermally Conductive Adhesive Tape 8904 Standard: 40m (0.20mm, 0.25mm & 0.50mm) Custom size can be supplied by request. 3M™ Thermally Conductive Adhesive Tape 8904 Application Ideas •  General Heat Sink Bonding •  IC Chip Packaging Heat Conduction •  Printed Circuit Board •  LED module/board bonding •  Flat Panel Display assembly (e.g. LCD and PDP devices) •  COF Chip Heat Conduction •  Mechanical fastening such as clamp, bracket, screw can be used in parallel with this thermal conductive tape. 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 for specification purposes. Product ASTM D-3330 90 Angle Peel Adhesion Crosshead speed : 508mm/min SUS 304 test substrate 15 min dwell at 23°C 72 hr dwell at 70°C 3M™ Thermally Conductive Tape 8904 Unit : gram/25.4mm width 0.20 0.25 0.50 Liner side >1300 >1300 >1300 Non-liner side >1300 >1300 >1300 Liner side >2000 >2000 >2000 Non-liner side >2000 >2000 >2000 ASTM D-1002 Unit : Kg/6.25cm2 Dynamic Shear Initial Adhesion Crosshead speed : 305mm/min (SUS to SUS) Foam Density (gram/cm3) 1.60 (±0.10) Dielectric Strength (KV/mm) 15 Flammability (UL94) VO (QMFZ2.E239181) Thermal Conductivity(See Note**) Operating Temperature Range* Long Term (Weeks-Months) Up to 80°C 3M Test Method Short Term (Hours-Days) Up to 90°C Product Series >15 1.5 W/m-K 8904-02 8904-025 8904-05 Thermal Conductivity >1.5 W/m-K >1.5 W/m-K >1.5 W/m-K Thermal Impedance 1.31°C-in2/W 1.35°C-in2/W 1.50°C-in2/W Thermal Impedance (metric) 8.49°C-cm2/W 8.74°C-cm2/W 9.70°C-cm2/W *Note: The end use customer application, design & verification testing will determine the final in use effective temperature range based on each application’s environmental conditions. Note** 8904 Thermal Conductivity Test Methods: 1.5W/m-K in XY direction per Hot wire plane Test method (Test equipment : QTM-500) 1.5W/m-K in Z direction per Simple/Modified ASTM D5470 Type Method (Test equipment : T3ster DynTIM) Application Techniques • Bond strength is dependent upon the amount of adhesive to surface contact developed. Firm application pressure helps to develop better adhesive contact and improve bonding strength. (2) 3M™ Thermally Conductive Adhesive Tape 8904 Application Techniques (continued) • To obtain optimum adhesion, the bonding surfaces must be clean, dry and well unified. Typical surface cleaning solvents are isopropyl alcohol and water (rubbing alcohol) or heptane. Note: Be sure to follow manufacturer’s safety precautions and directions for use when using solvents. • Ideal tape application temperature range is 21°C to 38°C (70°F to 100°F). Initial tape application to surfaces at temperatures below 10°C (50°F) is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is generally satisfactory. Storage and Shelf Life Shelf life is 12 months from the date of manufacture when stored in original cartons at 21°C (70°F) and 50% relative humidity. 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 knowledge and 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 is solely 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 product packaging 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 OF TRADE. If the 3M product does not conform to this warranty, then the sole and exclusive remedy is, at 3M’s option, replacement of the 3M product or 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 225-3S-06 St. Paul, MN 55144-1000 1-800-251-8634  phone   651-778-4244  fax www.3M.com/electronics 3M is a trademark of 3M Company. Please recycle. © 3M 2014. All rights reserved. 60-5002-0560-8 (3)