WESTAK CIRCUITS
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Materials

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Lead free compatible FR4 materials
  • Multifunctional epoxy resin systems
  • Wide range of applications and markets
  • ​Frequencies up to 2-3 GHz

Lead Free Applications - Mid to High Tg

Brand
Product
Tg
Td
Dk
Df
IPC-4101
UL
Isola
185HR
180°C
340°C
4.01
0.020
/98 /99 /101 /126
Y
Isola
370HR
180°C
340°C
4.04
0.021
/98 /99 /101 /126
Y
Isola
IS410
180°C
350°C
3.97
0.020
--
Y
Isola
IS415
200°C
370°C
3.72
0.012
/98 /99 /101 /126
Y
Iteq
IT180A
175°C
345°C
4.4
0.015
--
Y
Ventec
VT47
180°C
​355°C
4.27
0.016
/98 /99 /101 /126
Y
Ventec
VT481
​155°C
​​345°C
4.3
0.015
--
Y
EMC
​EM-827
​​175°C
350°C
4.3
0.019
/98 /99 /101 /126
Y
​TUC
TUC-768
​​180°C
350°C
4.3
0.018
--
Y
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Features:
  • Hybrid capability
  • Wide range RC% prepregs
  • Square weave and spread glass
  • ​Frequencies up to 10-15 GHz

High Performance - Low Loss, Mid Dk

Brand
Product
Tg
Td
Dk
Df
Frequency
UL
Isola
FR408
​180°C
​360°C
3.67
0.012
≤ 10 GHz
Y
Isola
FR408HR
190°C
​360°C
3.68
0.009
≤ 10 GHz
Y
Isola
FR408HRSI
180°C
360°C
3.68
0.009
​≤ 10 GHz
Y
Isola
I-Speed
180°C
​360°C
3.64
0.006
≤ 15 GHz
Y
Nelco
N4000-13
210°C
350°C
3.60
0.008
​​≤ 10 GHz
Y
Nelco
N4000-13EP
​210°C
350°C
3.60
0.009
​​≤ 10 GHz
Y
Nelco
N4000-13EPSI
210°C
350°C
3.20
0.008
​≤ 10 GHz
Y
Panasonic
Megtron 4 - R-5725
200°C
360°C
3.80
0.007
​≤ 10 GHz
N
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Features:
  • Excellent CAF performance
  • Superior thermal robustness
Don't Forget Foil Considerations!
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Features:
  • Precise control of the tolerance of Dk, Df and dielectric thickness
  • Copper foil options​
​Applications:
  • Antennas
  • Radar
  • Space based systems
  • Communications
  • Automotive
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High Speed Digital - Very Low Loss & Dk

Brand
Product
Tg
Td
Dk
Df
Frequency
UL
Isola
I-Tera MT40
200°C
360°C
3.45
0.0031
≤ 60 GHz
Y
Isola
Tachyon 100G
​200°C
​360°C
​3.02
​0.0021
​≤ 125 GHz
Y
Panasonic
​Megtron 6 (G) - R-5775
​185°C
410°C
​3.70
0.002
​≤ 50 GHz
Y
Panasonic
​Megtron 6 (K) - R-5775
185°C
410°C
3.70
0.002
​≤ 50 GHz
Y
Panasonic
​Megtron 6 (N) - R-5775(N)
​185°C
410°C
​3.40
​0.0015
​≤ 50 GHz
Y

 RF / Microwave - Ultra Low Loss & Dk

Brand
Product
Tg
Td
Dk
Df
Frequency
UL
Isola
I-Tera MT40 RF/MW
200°C
360°C
3.38 - 3.75
0.0028 - 0.0035
≤ 77 GHz
Y
Isola
Astra MT77
200°C
360°C
3.00
0.0017
≤ 125 GHz
Y
Panasonic
Megtron 7 - R-5785
200°C
400°C
3.60
0.003
​≤ 50 GHz
N
​Panasonic
Megtron 7 (N) - R-5785
200°C
400°C
3.40
0.002
​≤ 50 GHz
N
Rogers
​RO4350B
​280°C
390°C
3.66
0.0037
--
Y
Rogers
​RO4835
280°C
​390°C
3.66
0.0037
--
N
Rogers
RO4003C ​​
280°C
425°C
3.55
0.0027
--
**
Rogers
RO3003
--
500°C
3.00
0.0010
--
N
​Rogers
​RO5880 - RT/Duroid
--
500°C
2.20
0.0009
--
N
Taconic
TLX***
--
--
2.55
0.0017
--
N
Taconic
​TLY-5Z ***
--
--
2.20
0.0009
​≤ 77 GHz​
N
​Taconic
​TSM-DS3 ****
--
526​°C
2.94
0.0011
--
N
** Material Not UL Rated
***PTFE / Glass                  ****PTFE / Ceramic
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Features:
  • Maintains bond strength at high temperature
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Products shipping to the European Union have halogen restrictions!

Polyimide - Thermal Reliability

Brand
Product
Tg
Td
Dk
Df
IPC-4101
UL
Ventec
VT901
250​°C
395°C
4.05
0.012
​/40 /41
Y
Isola
P96
260°C
396°C
3.76
0.017
/40 /41
N
Nelco
N7000-2 VO
250​°C
390°C
3.76
0.010
/40 /41 /42
**
Arlon
85N
250​°C
387°C
4.20
0.010
/40 /41
N
** UL 94 V-1

Halogen Free

Brand
Product
Tg
Td
Dk
Df
IPC-4101
UL
Hitachi
MCL-HE-679G
180​°C
380​°C
3.90
0.009
/127 /128 /130
Y
Ventec
VT441
158°C
385°C
4.40
0.014
/127 /128
N
Panasonic
R-1566W / R-1551W
170°C
350​°C
4.60
0.010
/127 /128
N

Misc / Specialty Resins

Brand
Product
Tg
Td
Dk
Df
Frequency
UL
Rogers
92ML
160°C
400​°C
5.20
0.013
--
N
Taconic
CER-10
--
--
10.0
0.0035
--
N
Faradflex
MC24M
185°C
390​°C
3.48
0.016
--
N

Company

About Westak
​Locations

Careers
Certifications
Corp Responsibility

Engineering

Support
Design Guidelines
​Stack Up / Impedance
Tooling Package
​
IPC-D-356A Net List

Capabilities

Westak Facilities
Global Alliances

Support

Request For Quote
​Data Transfer Options
Contact Us
​Supplier Requirements
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  • Company
    • About Westak
    • Locations
    • Careers
    • Industry Certifications
    • Corp Responsibility
  • Engineering
    • Support
    • Design Guidelines
    • Materials
    • Stack Up Considerations
    • Tooling Package
    • IPC-D-356A Netlist
  • Capabilities
    • Westak Facilities
    • Global Alliances
  • Support
    • Request For Quote
    • Data Transfer Options
    • Contact Us
    • Supplier Requirements