Arlon 45NK Woven Kevlar® Reinforced Laminate and Prepreg

45NK is a woven Kevlar® aramid fiber reinforced multifunctional epoxy laminate system engineered to provide in-plane CTE values as low as 6 ppm/°C for compatibility with leadless alumina ceramic chip carriers (LCCCs) and other low expansion SMT devices where control of laminate expansion is critical for solder joint reliability. 45NK exceeds the requirements of IPC-4101/50 (Type AFG).High Tg (170°C) for improved reliability through process and in-useLow Dielectric Constant 3.9High modulus (19 Mpsi) p-aramid woven fiber reinforcement with CTE of -4 ppm/°C provides superior X-Y CTE of 5-7 ppm/°CProcess compatible with conventional high Tg multifunctional epoxy systems100% Organic resin/reinforcement system is suitable for laser drillingRoHS/WEEE compliantTypical Applications:SMT Board Designs using LCCCs or other low expansion chip carriersSMT Designs requiring both low in-plane CTE and laser drillingThis data represents typical values for the production material and should not be used as material specifications.Information provided by ARLON Silicone Technologies Division.