254

High Performance, Mid-Tg Laminate and Prepreg Materials

Download Data Sheet

Thermal PerformanceElectrical PerformanceIndustry Approvals
Tg
150°C
Td
340°C
Dk
4.30
Df
0.020
IPC-4101 - /21 /24
UL - File Number E41625
254 is a high-performance 150°C glass transition temperature (Tg) FR-4 system for multilayer Printed Wiring Board (PWB) applications where increased thermal performance and reliability are required.

254 is a high-performance 150°C glass transition temperature (Tg) FR-4 system for multilayer Printed Wiring Board (PWB) applications where increased thermal performance and reliability are required. 254 laminate and prepreg products are manufactured with a unique high-performance, multifunctional epoxy resin, reinforced with electrical grade (E-glass) glass fabric. This system provides improved thermal performance in comparison to traditional FR-4 while retaining FR-4 processability. In addition to this superior thermal performance, the mechanical, chemical and moisture resistance properties all equal or exceed the performance of traditional FR-4 materials.

The 254 system is also laser fluorescing and UV blocking for maximum compatibility with Automated Optical Inspection (AOI) systems, optical positioning systems and photoimagable solder mask imaging.

Product Attributes

Typical Market Applications

  • There are no typical market applications.

Product Features

  • Industry Recognition
    • UL File Number: E41625
    • Qualified to UL’s MCIL Program
    • RoHS Compliant
  • Performance Attributes
    • Lead-free assembly compatible
  • Processing Advantages
    • FR-4 process compatible
    • UV blocking and AOI fluorescence

Product Availability

  • Standard Material Offering: Laminate
    • 2 to 125 mil (0.05 to 3.2 mm)
    • Available in full size sheet or panel form
  • Copper Foil Type
    • HTE Grade 3
    • RTF (Reverse Treat Foil)
  • Copper Weight
    • ½ to 2 oz (18 to 70 µm) available
    • Heavier copper available
    • Thinner copper foil available
  • Standard Material Offering: Prepreg
    • Roll or panel form
    • Tooling of prepreg panels
  • Glass Fabric Availability
    • E-glass
    • Square weave glass

Production & Manufacturing

  • Currently manufactured in Asia, Europe
PropertyTypical ValueUnitsTest Method
Metric (English)IPC-TM-650 (or as noted)
Test data generated from rigid laminate50%2.3.16.2
Glass Transition Temperature (Tg) by DSC150°C2.4.25C
Decomposition Temperature (Td) by TGA @ 5% weight loss340°C2.4.24.6
Time to Delaminate by TMA (Copper removed)
A. T260
B. T288
30
>5
Minutes2.4.24.1
Z-Axis CTE
A. Pre-Tg
B. Post-Tg
C. 50 to 260°C, (Total Expansion)
65
250
3.4
ppm/°C
ppm/°C
%
2.4.24C
X/Y-Axis CTEPre-Tg13ppm/°C2.4.24C
Thermal Conductivity0.45W/mKASTM E1952
Thermal Stress 10 sec @ 288ºC (550.4ºF)
A. Unetched
B. Etched
PassPass Visual2.4.13.1
Dk, Permittivity
A. @ 2 GHz
B. @ 5 GHz
4.30
4.20
Bereskin Stripline
Df, Loss Tangent@ 2 GHz0.020Bereskin Stripline
Dk, Permittivity@ 5 GHz0.022Bereskin Stripline
Volume Resistivity
A. C-96/35/90
B. After moisture resistance
C. At elevated temperature
2.4 x 108
2.3 x 108
MΩ-cm2.5.17.1
Surface Resistivity
A. C-96/35/90
B. After moisture resistance
C. At elevated temperature
2.6 x 108
2.8 x 108
2.5.17.1
Dielectric Breakdown>50kV2.5.6B
Arc Resistance105Seconds2.5.1B
Electric Strength (Laminate & laminated prepreg)54 (1350)kV/mm (V/mil)2.5.6.2A
Comparative Tracking Index (CTI)3 (175-249)Class (Volts)UL 746A
ASTM D3638
Peel Strength
A. Low profile copper foil and very low profile copper foil all copper foil >17 μm [0.669 mil]
B. Standard profile copper
    1. After thermal stress
    2. At 125ºC (257ºF)
    3. After process solutions

1.05 (6.0)

1.56 (6.0)
1.23 (4.0)
1.58 (4.5)
N/mm (lb/inch)
2.4.8C

2.4.8.2A
2.4.8.3
2.4.8.3
Flexural Strength
A. Length direction
B. Cross direction
79,800
67,900
2.4.4B
Tensile Strength
A. Length direction
B. Cross direction
53,900
41,160
ASTM D3039
Poisson's Ratio
A. Length direction
B. Cross direction
0.174
0.54
ASTM D3039
Moisture Absorption0.3%2.6.2.1A
Flammability (Laminate & laminated prepreg)V-0RatingUL 94
Max Operating Temperature130°CUL 796
The data, while believed to be accurate and based on analytical methods considered to be reliable, is for information purposes only. Any sales of these products will be governed by the terms and conditions of the agreement under which they are sold.
03/16/2017
03/15/2017
01/20/2017
12/31/2015
10/16/2012

Webinars, Videos & Articles

Laminate & Prepreg Manufacturing (Presentation)

This presentation describes the process of laminate and prepreg manufacturing.

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We thank you for your interest in 254.

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