45NK is a woven Kevlar® aramid fiber reinforced multifunctional epoxy laminate and prepreg systemengineered to provide in-plane CTE values as low as 6 ppm/°C for compatibility with leadless alumina ceramic chip carriers (LCCC's) 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).

Functions: Laminate

Reinforcement Material: Aramid (Kevlar)

Processing Methods: Continuous Lamination

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Reinforcement Material
Composite Materials Functions

Features & Benefits

Labeling Claims
Materials Features

Applications & Uses

Composites Processing Methods

Properties

Flame Rating
Physical Form
Mechanical Properties
ValueUnitsTest Method / Conditions
Peel Strength to Copper (1 oz/35 micron) After Thermal Stress6 (1.05)lb/in (N/mm)IPC TM-650 2.4.8
Peel Strength to Copper (1 oz/35 micron) at Elevated Temperatures6 (1.05)lb/in (N/mm)IPC TM-650 2.4.8.2
Peel Strength to Copper (1 oz/35 micron) After Process Solutions6 (1.05)lb/in (N/mm)IPC TM-650 2.4.8
Young's Modulus4.0 (27.5)Mpsi (GPa)IPC TM-650 2.4.18.3
Poisson's Ratio0.2-ASTM D-3039
Physical Properties
ValueUnitsTest Method / Conditions
Specific Gravity1.37-ASTM D 792
Water Absorption (0.062)0.008%IPC TM-650 2.6.2.1
Thermal Properties
ValueUnitsTest Method / Conditions
Glass Transition Temperature (Tg) - DSC170°CIPC TM-650 2.4.25
Coefficient of Thermal Expansion (X,Y)5.0 - 6.0ppm/°CIPC TM-650 2.4.41
Coefficient of Thermal Expansion (Z) - Below Tg75ppm/°CIPC TM-650 2.4.24
Coefficient of Thermal Expansion (Z) - Above Tg225ppm/°CIPC TM-650 2.4.24
z-axis Expansion (50-260oC)2.8%IPC TM-650 2.4.24
Thermal Conductivity0.22W/(m K)DIN 52616
Electrical Properties
ValueUnitsTest Method / Conditions
Electrical Strength750 minVolts/milIPC TM-650 2.5.6.2
Dielectric Constant (1 MHz)3.9-ASTM D 150
Dissipation Factor (1 MHz)0.016-ASTM D 150
Volume Resistivity (C96/35/90)1.3 x 10^7MΩ-cmIPC TM-650 2.5.17.1
Surface Resistivity (C96/35/90)3.2 x 10^7IPC TM-650 2.5.17.1
Flammability
ValueUnitsTest Method / Conditions
FlammabilityV-0classUL-94

Regulatory & Compliance

Certifications & Compliance