1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2003 01 21 Revised Para 3.0 inserted ; Para 3.1, 3.2, 3.3, 3.19, 3.20, 4 deleted 1999 08 11 Activated M. Liu J. Skelly Page 1 of 2 Copyright 2002, Ford Global Technologies, Inc. ADHESIVE, EPOXY, THERMAL CURE
2、 SURFACE WSS-M2G339-A5 MOUNTED COMPONENTS 1. SCOPE The materials defined by this specification are one component, room temperature stable, fast curing, electrically non-conductive, thixotropic, thermosetting epoxy adhesives. 2. APPLICATION This specification was originally released for a chip-on-bo
3、ard die attach adhesive. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 COLOR Silver/gay 3.5 APPEARANCE Smooth thixotropic paste 3.6 VISCOSITY,
4、poise (Brookfield Sp 7 at 1 rpm) 9,000+/-250 (Brookfield Sp 7 at 10 rpm) 1500+/-40 3.7 THIXOTROPIC INDEX, min 4.5-7.5 (Viscosity measured per para 3.6) Thixotropic Index: ratio of viscosity at 1 rpm: viscosity at 10 rpm 3.8 LAP SHEAR STRENGTH, psi, 700 (ASTM D 1002) 3.9 GLASS TRANSITION TEMPERATURE,
5、 C 50 to 75 (ASTM D 3418) 3.10 VOLUME RESISTIVITY, -cm, min 8 x 10-4 (ASTM D 257) ENGINEERING MATERIAL SPECIFICATION WSS-M2G339-A5 Page 2 of 2 Copyright 2002, Ford Global Technologies, Inc. 3.11 COEFFICIENT OF THERMAL EXPANSION, ppm alpha 1, 69 (ASTM 3386) alpha 2, 250 3.12 IONIC CONTENT, ppm Chlori
6、de 16 (Dionex DX100) Sodium 5 Potasium 5 3.13 THERMAL STABILITY NASA MSFC Spec-592 weight loss Rev. B. Para 4.5.5.1 1.5 % at on cure Mettler TGA 0.3 % at 300 C 3.14 MODULUS, Pa 3.6 x 106 (ASTM D638) 3.15 STORAGE LIFE at 5 C 3 months at -100 C 6 months at -400 C 12 months 3.16 WORKING LIFE 2 weeks at
7、 250 C 3.17 CURE SCHEDULE 30 minutes at 130 C or 10-14 minutes at 150 C 3.18 PNEUMATIC FLOW TEST, g, range 0.5 - 1.1 Test Method: Using a timed pneumatic dispense, with a 10 cc luer lock syringe pressurized to 310 kPa and fitted with an 18 gauge needle, measure the amount of adhesive dispensed in 3 minutes.
