Printed circuit board materials

Various requirements for printed circuit boards make the use of different circuit board substrates necessary. 

Whereas for many standard applications the classical FR4 material is sufficient, possibly in high Tg version (for improved thermo-mechanical properties), for other areas (such as high frequencies) alternate materials are absolutely required.

The following information is intended as a abstract summary of all available material types and their fundamental properties, to make it easier for you to make a selection according to the required field of application. 

Please note: The selected materials may be replaced by technically equivalent or similar products, according to available stocks on hand.

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Materials for rigid circuit boards

Materials for rigid circuit boards
°C ppm/°C at 1MHz KV/mm MΩ V min min °C N/mm
ISOLA Duraver-E-Cu 104i
Standard FR4 		135° 53 4,6 - 4,9 45 1,3 x 10^6 >175 60 - 310° 1,2
ISOLA Duraver-E-Cu 104 KF
FR4 tracking resistant 		135° 45 4,6 - 4,9 - 4,1 x 10^6 >400 - - - 1,6
ISOLA Duraver-E-Cu 156
FR4 halogen-free 		150° 45 4,6 - 4,9 50 4 x 10^4 - 60 - - -
ISOLA IS410
High-Tg, CAF-Enhanced 		170° 55 4,8 - 2 x 10^7 - 60 30 360° 1,3
ISOLA IS420
High-Tg, CAF-Enhanced 		170° 40 4,9 40 1,1 x 10^6 - 60 15 340° 1,1
ISOLA P97
Based on polyimide 		260° 54 4,4 53 2,1 x 10^8 >175 - 18 - -
ISOLA G200
BT-Epoxy 		185° 140 4,1 46 1 x 10^7 >175 20 8 - -

Unless otherwise noted, the CTI (Comparative Tracking Index) which indicates the tracking resistance, is for rigid PCBs: PLC3 (175V - 250V). On request, we are able to produce PCBs with PLC1 (> 400V) or PLC0 (>600V).

Materials for flexible circuit boards

Materials for flexible circuit boards
°C ppm/°C at 1MHz KV/mm MΩ V min min °C N/mm
DuPont Pyralux AP
Polyimide material 		105° 25 3,4 150 - - 60 - - 1,8
DuPont Pyralux FR
Coverlay 		105° - 3,4 126 1 x 10^7 - - - - 1,6
DuPont Pyralux LF
Adhesive 		105° - 3,2 120 1 x 10^7 - - - - -
ARLON 85N
Polyimide High-Tg 		210° 55 4,2 126 1,6 x 10^6 - 60 60 - 1,2

Materials for metal core boards

Materials for metal core boards
°C ppm/°C at 1MHz KV/mm MΩ W/m*K min min °C N/mm
KL Thermal E
Metal Core 1L 		130° - 4,7 - 1,1 x 10^6 0,66 13 3 - -
Chaoshun CCAF-01
Metal Core 2L 		- 4,2 31 5 x 10^7 1 - - - 2
Chaoshun CCAF-04
Metal Core 2L 		- 4,2 31 5 x 10^7 1,5 - - - 1
Chaoshun CCAF-05
Metal Core 2L 		- 4,24 60 3,68 x 10^7 2,2 - - - 1,1

Materials for high frequency boards

Materials for high frequency boards
°C ppm/°C KV/mm MΩ W/m*K min min °C N/mm
Rogers 4350B
Rogers 4350B 		280° 50 3,7@10GHz 31 5,7 x 10^9 - - 390° 0,9
ISOLA IS620
Icon: pdf file E- fibre glass 		220° 55 4,5@1MHz 37 7,3 x 10^6 - - - - 1,2
Taconic RF-35
Ceramic (such as for microwave applications) 		315° 64 3,5@1,9GHz - 1,46 x 10^8 0,24 - - - 1,8
Taconic TLX
PTFE 		- 135 2,5@10GHz - 1 x 10^7 0,19 - - - 2,1
Taconic TLC
PTFE 		- 70 3,2@10GHz - 1 x 10^7 0,24 - - - 2,1

Additional information