Glass
Transition
Temp

Dielectric
Constant
@1MHZ

Dissipation
Factor
@1MHZ

Water
Uptake
(%)

CTE
X-Y Axis

Characteristics

Woven
E-Glass

Epoxy
(GFG/FR-4)
(IPC-4101/24)


Epoxy
(GFG/FR-4)


Polyimide
(GIL)
(IPC-4101/41)


BT
(IPC-4101/30)

170



180°C



260°C



185°C

4.4



4.4



4.3



4.1

.019



.018



.013



.013

0.1



0.1



0.3



0.14

12-16
ppm/°C

10-14
ppm/°C


12-15
ppm/°C


12-15
ppm/°C

Tetrafunctional Epoxy Improved FR-4 Performance Better Electrical, Chemical And Thermal Properties

Higher Temperature
Multifunctional Epoxy
Dimensionally Stable

High Temperature
Assembly
Rework Friendly

Enhanced Thermal
Mechanical and
Electrical
Performance

Non-Woven

Non-Woven
Aramid Epoxy

Non-Woven
Aramid
Polyimide

180°C



250°C

3.9



3.9

.024



.015

0.5



0.7

7-10
ppm/°C


6-9
ppm/°C

Low CTE
Light Weight
Microvias,
Tight Dielectrics

Low CTE
High Temp.
Light Weight
Microvias,
Tight Dielectrics