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PCB Material

Rigid Material

How to choose material for PCB

In order to meet the different requirements of the PCB board, From material selection, board design, to anti-jamming performance requirements , all aspects should make a reasonable choice and design, most of the time, ordinary FR4 will be able to meet the design requirements, but Some special boards need special material , and many times customer have specified board material , but for some reason we can not buy these material directly . In fact, we have the same similar performance board material instead .

The choice of board material needs to consider the manufacturability of the factory , the availability of materials, the cost and the applicability of laws and regulations.


Key data of the board material performance

• Tg value (glass transition point temperature of the material)

• Td value or T260, T288 (thermal decomposition temperature of the material)

• Er value and Tanδ (Dk and Df) (dielectric loss and dielectric loss tangent),

• Halogen content (whether halogen-free material),

• Other considerations: CAF (anode conductive wire), IST, Q1000, UL grade, CTI (leakage tracking index), Water absorption ….


Recommended board material





Fr4 laminate

KB KB-6160

Tg   =135 Td =305

Shengyi S1141

Tg   =140 Td =310 Z-CTE(50-260 )=4.5%

Shengyi S1000-2

Tg   =180 Td =345 Z-CTE(50-260)=2.8%

KB KB-6167F

Tg   =170 Td =349 Z-CTE(50-260)=2.6%


Shengyi S1000-2

Tg   =180 Td =345 Z-CTE(50-260)=2.8%

Dk And Df

Non-PTFE thermoset resin systems with ceramic loading

Nelco   N4000-13

Dk=3.7,   Df=0.009 Tg=210

Rogers   4003C

Dk=3.38,   Df=0.0027 UL94VO

Rogers   4350B

Dk=3.48,   Df=0.0037 UL94VO

Rogers   RO4450F (4mil)

Dk=3.52,   Df=0.004 UL94VO

Arlon   25FR

Dk=3.58,   Df=0.0035 UL94VO

Arlon   25FR 1080 (3.9mil)

Dk=3.58,   Df=0.0035 UL94VO

PTFE laminate (Teflon)

Arlon   Diclad 880

Dk=2.17,   2.20, Df=0.0009

Taconic   TLY-5 A, TLY-5

Dk=   2.17, 2.20 , Df=0.0009

Arlon   Diclad 527

Dk=2.40-2.60,   Df=0.0022

Taconic TLX-8

Dk=2.51-2.59,   Df=0.0019

Taconic   RF-30

Dk=3.0,   Df=0.0014

Arlon   AD300

Dk=3.0,   Df=0.003

Taconic   RF-35, RF-35P

Dk=3.50,    Df=0.0018, 0.0025

Arlon   AD350, AD350A

Dk=3.50,   Df=0.003

Arlon   AD1000

Dk=10.20,   Df=0.0023

Taconic   CER-10

Dk=10.00,   Df=0.0035

Halogen Free

Shengyi S1150G

Tg=   155, Td =355, Z-CTE(50-260 )=2.8%

Shengyi S1170G

Tg=   180, Td =390, Z-CTE(50-260 )=2.3%

KB HF-140

Tg=   140, Td =350, Z-CTE(50-260 )=3.3%


Shengyi S1600L

CTI   ≥600V  Tg= 150 Td =355

Shengyi S1600

CTI   ≥600V  Tg= 135 Td =310

KB KB-6160C

CTI ≥600V  Tg   =130 Td =314

Thermal Conductivity

Bergquists' Tclad Fullguide

1.3/2.2/3.0 [W/m-K] 

AL-01-B50  / AL-01-B40 

5.0 [W/m-K] /4.0 [W/m-K] 

Polytronics' TCB

2.0/3.0/4.0/8.0 [W/m-K] 

Plugged Via Material


Resin,Light Gray White,Halogen-free

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