Technical Data May 2014 3M Electrically Conductive Adhesive Transfer Tape 9707 Product Description 3M Electrically Conductive Adhesive Transfer Tape (ECATT) 9707 is a pressure sensitive adhesive (PSA) transfer tape with isotropic electrical conductivity. The PSA matrix is filled with conductive fillers that allow interconnection between substrates through the adhesive thickness (the Z-axis) and also provides electrical conductivity in the plane of the adhesive (X-Y Axis). 3M ECATT 9707 and 9707K are ECATT products produced at different manufacturing locations. 3M ECATT 9707 and 9707K use similar base material types, however the ratios were adjusted slightly to achieve desired manufacturing specification performance results as determined by 3M test methods. Features and Benefits Good XYZ electrical conductivity performance with good adhesion Room temperature application and assembly Inherent EMI shielding capability can enhance existing shielding solutions, offer new design options and improve Faraday cage designs Provides an electrical connection and adhesively bonds EMI/RFI shields and gaskets to metal frames and enclosures Low contact resistance and tape construction for good EMI performance Can be applied as die cut parts or in roll form Can offer lower contact resistance to hard surfaces or surfaces with oxide layers, such as to stainless steel as compared to 3M ECATT 9709 Construction Property Value Adhesive Type Filled Acrylic Pressure Sensitive Release Liner Std PET/PET Liners Approximate Thickness Adhesive 2 mil (50 m) Liner(s) 2 mil (50 m) PET / 2 mil (50 m) PET 3M Electrically Conductive Adhesive Transfer Tape 9707 Typical Physical Properties and Performance Characteristics Note: T he following technical information and data should be considered representative or typical only and should not be used for specification purposes. (Note 6) Adhesive Properties: Peel Adhesion to Stainless Steel: (Test Method is based on a modified ASTM D3330, 12 ipm peel rate, 1 in. width, 2 mil PET backing, 180 degree) Dwell Time Room Temperature 1 Hour 24 Hours 23C 32.5 oz./in. (3.6 N/cm) 55 oz./in. (6.0 N/cm) Note: Peel values will often be higher than noted above when using a non-PET backing. Different backing types affect the backing modulus, thickness and stiffness and these differences directly affect the peel test result value. As an example, a 2 mil aluminum backing will change the test value of the peel adhesion. This is because the angle of the peel back at the interface will change due to the backing stiffness. A 2 mil aluminum backing would generally increase the peel values. Application Use Temperatures: (Note 1) Temperature Performance -40 to +85C Varies with application design. See Note 1. See also the Application section of this document T ape in roll form: Shelf life 24 months from the date of manufacture when stored Shelf Life and Storage in original cartons at 21C (70F) and 50% relative humidity. (Note 6) Electrical Properties: (Note 3) Current Carrying Capacity To be qualified by end use customer Z-Axis Resistance 1 Hr dwell, <0.5 ohms (Note 1,2,4,5) 2mm x 5mm contact area Minimum Overlap Area Application dependent (Note 6) Thermal Performance: Apparent Thermal Conductivity 0.6 - 0.7 W/mk Note 1 A pplication use temperature range of the 3M Electrically Conductive Adhesive Transfer Tape 9707 may be increased or have improved reliability with the use of a mechanical clamping system as determined by the end use customer. The temperature use range is dictated by two primary items: Temperature performance of the acrylic adhesive (generally in the range of -40C to about 95C depending on other environmental conditions) as it supports the conductive particles in the adhesive/particle matrix and the potential movement of the conductive fillers in the adhesive system in an end use application design. Items contributing to the good performance of the 3M ECATT 9707 for resistance level performance include, but are not limited to: assembled bond line force (constant force present across the bond line after assembly and over the life of the product), types of substrates bonding, surface features in bonded area, etc. (See section on mechanical clamping for added information). Note 2 Two wire resistance measurement (a 4 wire test would generally be lower). The Z axis test uses a test PCB with gold traces or pads that are 2mm wide. The ECATT tape is laminated to a polyimide or PET flex with a gold plating. The ECATT is laminated to the flex to cover about 50% of the flex surface. The flex/ECATT is bonded to the PCB gold pad and the opposite (non-ECATT end) is placed into contact with another gold PCB trace to make an electrical contact. Contact R is measured between the two PCB pads of the flex to infer a relative contact R of the ECATT product based on this test method and surfaces used. Note 3 Estimated. Customers are required to qualify the maximum current capability for their application. Added compression in bond line suggested for any current carrying application to improve reliability. See also Note 1 Note 4 Minimum suggested conductor overlap area (pad area) in the interconnection of individual circuit lines to ensure Z-Axis conduction must be optimized for each application and environmental and mechanical design conditions. Note 5 Z & XY conductivity end use and testing results will vary based on many factors such as, but not limited to: End use design, environmental conditions, aging environment, test methods, interface material types & compatibility, product lot to lot & with-in lot variability, XY span, surface features & topagraphy, area, surface preparation, etc. Note 6 3M ECATT 9707 and 9707K are ECATT products produced at different manufacturing locations. 3M ECATT 9707 and 9707K products use similar base material types, however the ratios were adjusted slightly to achieve desired manufacturing specification performance results as determined by 3M test methods. Available Sizes Slit Tape Width Standard Length Maximum Length 1.0 to 12 inch 36 yds. 108 yds. (25 mm to 354 mm) (32.9 m) (98.8 m) 0.065 in. Normal Slitting Tolerance (0.8 mm) (2)