DESCRIPTION
Multi-Cure® 984-LVUF is a highly fluorescing, single-component, 100%-solids conformal coating specifically formulated for rapid room-temperature cure when exposed to UV light. 984-LVUF retains high fluorescence after curing. Thin-layer coatings cure almost instantly to a depth of 7 mils and fluoresce upon exposure to “black” light. Multi-Cure® 984-LVUF also exhibits adhesion to a variety of metal, ceramic, and glass-filled epoxy surfaces. 984-LVUF is a moderately low-viscosity coating which can be cured by exposure to UV light and secondarily cured with heat for shadowed areas on densely populated circuit boards. This product is in full compliance with the RoHS Directives 2002/95/EC and 2003/11EC.
Multi-Cure® 984-LVUF is approved to Military Specification MIL-I-46058-C, Type AR, ER, and UR (QPL#576-90). 984-LVUF meets “NSA” hydrolytic stability (reversion) requirements.
Multi-Cure® 984-LVUF is qualified to IPC-CC-830-B.
Multi-Cure® 984-LVUF is UL recognized (UL 746C), rated indoor/outdoor to 120°C, and 94V-0 flame class.
TYPICAL UNCURED PROPERTIES (not specifications)
Solvent Content None
Appearance Single Component/Clear Fluorescing Liquid Single
Specific Gravity 1.05
Shelf life 12 months
Viscosity 150 cP (nominal) ASTM D-1064
TYPICAL CURED PROPERTIES (not specifications)
PHYSICAL
Durometer Hardness D80 ASTM D-2240
Humidity Resistance (85°C/95RH, 120 day) Pass IPC-CC-830
Tensile at Break 6,000 psi ASTM D-638
Elongation at Break 5% ASTM D-638
Modulus of Elasticity 60,000 psi ASTM D-638
Water Absorption 0.4% ASTM D-570
Glass Transition, Tg 84°C DSTM256
Cross Hatch Adhesion Test: Copper 100% ASTM D-3359
G-10 100% ASTM D-3359
THERMAL
Thermal Shock (-65/+125°C) 100 cycles, Class 3 IPC-CC-830
Thermal Limit (brittle/degrades) -55° to 175°C (-65° to 350°F) DSTM D-200*
Coefficient of Linear Thermal Expansion 69 x 10-6 in/in/°C E-831
ELECTRICAL
Dielectric Strength 1,800 V/mil ASTM D-1304
Volume Resistivity 35.8 x 1012 ohm-cm ASTM D-1304
Surface Resistivity 384 x 1012 ohm ASTM D-1304
Dissipation Factor, 1 MHz 0.03 ASTM D-1304
Dielectric Constant, 1 MHz 3.4 ASTM D-1304
*DSTM refers to DYMAX Standard Test Method
CURE SCHEDULE – UV Cure with 365 nm UV light[1]
Cure Time Intensity DYMAX Light-Welder®
(seconds) mW/cm2 Lamps
30 1 5000-EC
250 2,500 UVC-6 with F-300, D-bulb
……
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ELECTRONIC CIRCUIT BOARD MATERIALS 984-LVUF Product Data Sheet (57.6 KB, 97 次)
Conformal coatings materials are applied to electronic circuitry to act as protection against moisture, dust, chemicals, and temperature extremes that if un-coated (non-protected) could result in a complete failure of the electronic system.