920_Datasheet

Product Information Sheet MATERIAL ID: EPO-TEK® 920 Date: 08/2007 Per: Rev: III Material Description: A two component, high Tg, electrically insulating, thermally conductive epoxy designed for thermal management applications found in semiconductor, hybrid microelectronics, PCB, and optical industries. It can be an adhesive for mounting heat sinks and substrates, a seal for many types of packages, or a thermal potting compound. It is a NASA approved, low outgassing epoxy. Number of Components: Two Mix Ratio by weight: 100:3 Cure Schedule (minimum) 150°C/5 Minutes - 120°C/10 Minutes - 100°C/20 Minutes Specific Gravity: --- Part A: 2.24 Part B: 1.02 Pot Life: 5 Hours Shelf Life: Six months at room temperature NOTE: Container(s) should be kept closed when not in use. Filled systems should be stirred thoroughly before mixing and prior to use MATERIAL CHARACTERISTICS: To be used as a guide only, not as a specification. Data below is not guaranteed. Different batches, conditions and applications yield differing results; Cure condition: 150°C/1 hour * denotes test on lot acceptance basis PHYSICAL PROPERTIES: *Color (before cure): Part A: Grey Part B: Amber *Consistency: Smooth paste Die Shear @ 23°C: = 15 Kg / 5100 psi *Viscosity (23°C): Degradation Temp: 343 °C @ 20 rpm 13,000 - 20,000 cPs Weight Loss: Thixotropic Index: 2.1 @ 200°C: < 0.05 % *Glass Transition Temp: = 90 °C (Dynamic Cure @ 250°C: 0.24 % 20—200°C /ISO 25 Min; Ramp -10—200°C @ 20°C/Min) @ 300°C: 0.77 % Coefficient of Thermal Expansion (CTE): Operating Temp: Below Tg: 24 x 10-6 in/in°C Continuous: - 55°C to + 200°C Above Tg: 117 x 10-6 in/in°C Intermittent: - 55°C to + 300°C Shore D Hardness: 90 Storage Modulus @ 23°C: 762,091 psi Lap Shear @ 23°C: > 2,000 psi *Particle Size: = 50 microns ELECTRICAL AND THERMAL PROPERTIES: Thermal Conductivity: 0.97 W/mK Dielectric Constant (1KHz): 5.19 Volume Resistivity @ 23°C: = 1 x 1014 Ohm-cm Dissipation Factor (1KHz): 0.008 OPTICAL PROPERTIES @ 23°C: Spectral Transmission: N/A Index of Refraction: N/A EPOXY TECHNOLOGY, INC. 14 FORTUNE DRIVE, BILLERICA, MA 01821 (978) 667-3805, FAX (978) 663-9782 WEB SITE: www.epotek.com Document No. 43 Rev. D