P Wakefield Accessory Products Engineering THERMAL COMPOUNDS, ADHESIVES, INTERFACE MATERIALS, HARDWARE, INSTALLATION TOOLS ( ( DeltaBond 155 DeltaBond 155 is an epoxy adhesive formulated for use within the semiconductor industry. An easy to mix spread ' thixotropic paste, it offers high heat transfer, low shrinkage, and a coefficient of thermal expansion comparable to that of copper and aluminum. This adhesive is principally used to form thermally conductive joints in fabricated heat sinks and between heat sinks and power devices. When used to bond semiconductors to heat sinks, it also serves as an electrical insulator. Its strong bond to a wide variety of substrates resists severe temperature cycling. DeltaBond 155 is only available in kit size. Simply squeeze out equal lengths and mix to uniform color. _ DELTABOND 155 : Typical Prope ales Fully Cured DeltaBond 155, Parts of hardener per 100 parts of resin by volume 100 Thermal conductivity - ~ : : . Wim) ( 0.836 Tinitial cure time TF 8 hrs (Btu)(in.)/(hr) (ft2) (F) 5.8 150F - 45 min =< : : as : 250F 20 min | Thermal resistivity-(C) (inwatt | = 47 : Bond shear strength - 7 2,600 eee a - a 1 in. overlap - psi 125F _ aoniaainus: 212F _ Working viscosity (77F) cps Heatdistorton point-"F = ss | 130 Minimum dielectric strength, vw/mil, 0.125 in. sample 400 Max operation Continuous Ss : = : we Ss. LULD CU DeltaBond 155] 155 oz resin, 3 02 in PIN 155 DeltaBond 156 Thermally Conductive Adhesive is a modified acrylic adhesive designed for permanent mounting on components where heat must be effectively transmitted. Recommended for electromechanical assemblies to bond components and dissipate heat, it replaces mechanical fasteners and compressible pads, silicon grease, and epoxies; eliminates air entrapment, and other variables related to epoxy mixing. This soft paste requires no mixing and flows easily to allow thin bondlines. Primer activated, cure begins upon assembly. DeltaBond Activator fixtures at room temperature in less than 5 minutes. Full strength is developed in 4 to 12 hours and fillets become dry to the touch in 24 hours. It is not recommended to use this durable adhesive without the use of DeltaBond Activator. DeltaBond 156 is available in kit size; order 156-K (25 ml Syringe and Activator Kit). DeltaBond 156 I ____ DELTABOND 156 DELTABOND156 ee wa | a ew Ee L. Dielectric Strength 220 volts/mil D149 Temperature Range = . oe Dielectric Constant, 77F (25C) D150 rr 100 Hz 14.92 Intermittent 1000 Hz 14.26 Tensile Strength, at break 2360 psi __ D638 1MM Hz 12.34 SEK ut teeok Say ee Dissipation Factor, 77F (25C) D150 Outgassing 2.5% TLM E595 100 Hz 0.05 0.05% ae 0) 1000 Hz 0.03 Coefficient of Thermal Expansion | 7.1 x 10 + (cm/cm* iM 0.06 Tensile Shear 2500 psi D1002 ee ee 7 Thermal Conductivity, K 3.47 Btu x in./hr ft? F Volume Resistivity - 5.2x10" (ohms-cm) | D257 (absolute at 86F (30C)) (0.50 W/mC) Surface Resistivity 8.6 x 10 (ohms) D257 Note: The absolute thermal conductivity test was developed Note: DeltaBond Thermally Conductive Adhesive-High Strength specifically for measuring thermal properties of thin film adhesive bonds. contains a metallic filler which, in certain applications, may have an effect on electrical properties. Therefore, test each particular application to ensure that electrical properties are as required. DeltaBond 156 | 156-K pee 44 oz fl contents - 12 ml gms, B200 gms, C500 gms, D5 lbs. Larger batch sizes will greatly reduce working time. T After initial cure, material may be handled, removed from fixture, etc., but has not yet achieved full properties and should be room temperature aged or post-cured as'shown to achieve full physical and electrical properties. zee $ After initial cure, material may be brought to full physical and electrical properties during post-cure or may be room temperature aged for charted length of time to achieve same full properties. ae Bs = 4 The information contained herein is based on data believed to be reliable but we do not assume responsibility for accuracy. All such information is used at the customer's own risk, conditions of use being beyond our control. *Since the hardener/resin reaction is exothermic, it is important that batch size be matched to hardener speed. Working times given are for approximate batch sizes: A200 Please see Sales Offices on pages 193-194 to 185 contact the Sales Representative nearest you.