370HR

High Performance Laminate and Prepreg

Download Data Sheet

Thermal PerformanceElectrical PerformanceIndustry Approvals
Tg
180°C
Td
340°C
Dk
4.04
Df
0.0210
IPC-4101 /101 /98 /99 /126
UL - File Number E41625
370HR is the industry’s “best in class” lead-free compatible product for high-reliability applications across a wide range of markets.

370HR laminates and prepregs are made using a patented high performance 180°C Tg FR-4 multifunctional epoxy resin system that is designed for multilayer Printed Wiring Board (PWB) applications where maximum thermal performance and reliability are required. We manufacture 370HR laminates and prepregs with a patented high performance resin and high quality E-glass glass fabric for superior Conductive Anodic Filament (CAF) resistance. This system provides superior thermal performance with low Coefficient of Thermal Expansion (CTE) and the mechanical, chemical and moisture resistance properties that equal or exceed the performance of traditional FR-4 materials.

370HR is used in thousands of PWB designs and has proven to be best in class for thermal reliability, CAF performance, ease of processing and proven performance on sequential lamination designs.

Product Features

  • Industry Recognition
    • UL File Number: E41625
    • Qualified to UL’s MCIL Program
    • RoHS Compliant
  • Performance Attributes
    • CAF resistant
  • 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
    • Mechanically spread glass

Production & Manufacturing

  • Currently manufactured in Asia, North America, Europe
PropertyTypical ValueUnitsTest Method
Metric (English)IPC-TM-650 (or as noted)
Glass Transition Temperature (Tg) by DSC180°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
60
30
Minutes2.4.24.1
Z-Axis CTE
A. Pre-Tg
B. Post-Tg
C. 50 to 260°C, (Total Expansion)
45
230
2.8
ppm/°C
ppm/°C
%
2.4.24C
X/Y-Axis CTEPre-Tg13/14ppm/°C2.4.24C
Thermal ConductivityW/mKASTM E1952
Thermal Stress 10 sec @ 288ºC (550.4ºF)
A. Unetched
B. Etched
PassPass Visual2.4.13.1
Dk, Permittivity
A. @ 100 MHz
B. @ 1 GHz
C. @ 2 GHz
D. @ 5 GHz
E. @ 10 GHz
4.24
4.17
4.04
3.92
3.92
2.5.5.3
2.5.5.9
Bereskin Stripline
Bereskin Stripline
Bereskin Stripline
Df, Loss Tangent
A. @ 100 MHz
B. @ 1 GHz
C. @ 2 GHz
D. @ 5 GHz
E. @ 10 GHz
0.0150
0.0161
0.0210
0.0250
0.0250
2.5.5.3
2.5.5.9
Bereskin Stripline
2.5.5.5
2.5.5.5
Volume Resistivity
A. After moisture resistance
B. At elevated temperature
3.0 x 108
7.0 x 108
MΩ-cm2.5.17.1
Surface Resistivity
A. After moisture resistance
B. At elevated temperature
3.0 x 106
2.0 x 108
2.5.17.1
Dielectric Breakdown>50kV2.5.6B
Arc Resistance115Seconds2.5.1B
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

1.14 (6.5)

1.25 (7.0)
1.25 (7.0)
1.14 (6.5)
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
90,000
77,000
ksi2.4.4B
Tensile Strength
A. Length direction
B. Cross direction
55,900
35,620
ksiASTM D3039
Young's Modulus
A. Length direction
B. Cross direction
3744
3178
ksiASTM D790-15e2
Poisson's Ratio
A. Length direction
B. Cross direction
0.177
0.171
ASTM D3039
Moisture Absorption0.15%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.

Core Data

ConstructionsResin Content %Standard/AlternateThickness (inch)Thickness (mm)Dielectric Constant (DK) / Dissipation Factor (DF)
100 MHz500 MHz1 GHz2 GHz5 GHz10 GHz
1 - 10671Standard0.0020.051
3.89
0.0181
3.84
0.021
3.81
0.024
3.77
0.025
3.63
0.03
3.63
0.03
1 - 106765Alternate0.0020.051
3.99
0.0172
3.94
0.02
3.91
0.022
3.88
0.023
3.74
0.028
3.74
0.028
1 - 108058Standard0.00250.064
4.11
0.0161
4.06
0.018
4.04
0.021
4.00
0.022
3.88
0.026
3.88
0.026
1 x 108059Standard0.0030.076
4.09
0.0163
4.04
0.018
4.02
0.021
3.99
0.022
3.86
0.026
3.86
0.026
1 - 211346Alternate0.0030.076
4.34
0.0142
4.30
0.016
4.28
0.018
4.25
0.019
4.14
0.022
4.14
0.022
1 - 108660Alternate0.0030.076
4.07
0.0164
4.02
0.019
4.00
0.021
3.97
0.022
3.84
0.026
3.84
0.026
1 - 211354Standard0.00350.089
4.18
0.0155
4.14
0.017
4.11
0.02
4.08
0.021
3.96
0.024
3.96
0.024
1 - 331351Alternate0.00350.089
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
2 - 10668Standard0.00350.089
3.94
0.0177
3.89
0.02
3.86
0.023
3.82
0.024
3.68
0.029
3.68
0.029
1 - 211647Standard0.0040.102
4.32
0.0144
4.27
0.016
4.26
0.018
4.23
0.019
4.17
0.022
4.17
0.022
1 - 331355Alternate0.0040.102
4.16
0.0156
4.12
0.018
4.10
0.02
4.05
0.021
3.99
0.244
3.99
0.025
106 / 108060Standard0.0040.102
4.07
0.0164
4.02
0.019
4.00
0.021
3.97
0.022
3.84
0.026
3.84
0.026
106 / 108062Alternate0.00430.109
4.04
0.0167
3.99
0.019
3.97
0.022
3.93
0.023
3.80
0.027
3.80
0.027
1 - 211651Standard0.00450.114
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
2 - 108055Standard0.00450.114
4.16
0.0156
4.12
0.018
4.10
0.02
4.05
0.021
3.99
0.244
3.99
0.025
1 - 211654Standard0.0050.127
4.18
0.0154
4.14
0.017
4.11
0.02
4.08
0.021
3.96
0.024
3.96
0.024
1 - 165243Alternate0.0050.127
4.40
0.0137
4.36
0.015
4.34
0.017
4.32
0.018
4.21
0.021
4.21
0.021
2 -108058Standard0.0050.127
4.11
0.0161
4.06
0.018
4.04
0.021
4.00
0.022
3.88
0.026
3.88
0.026
106 / 211357Alternate0.00530.135
4.13
0.016
4.08
0.018
4.06
0.021
4.02
0.021
3.90
0.025
3.90
0.025
1 - 165246Alternate0.00550.14
4.34
0.0142
4.30
0.016
4.28
0.018
4.25
0.019
4.14
0.022
4.14
0.022
2 x 108059Standard0.0060.152
4.09
0.0163
4.04
0.018
4.02
0.021
3.99
0.022
3.86
0.026
3.86
0.026
1 - 165251Standard0.0060.152
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
2 - 108659Alternate0.0060.152
4.09
0.0163
4.04
0.018
4.02
0.021
3.99
0.022
3.86
0.026
3.86
0.026
1 - 762842Standard0.0070.178
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02
2 - 211354Standard0.0070.178
4.18
0.0155
4.14
0.017
4.11
0.02
4.08
0.021
3.96
0.024
3.96
0.024
2 - 331351Alternate0.0070.178
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
1 - 762844Alternate0.00750.191
4.38
0.0139
4.34
0.015
4.32
0.017
4.29
0.018
4.19
0.021
4.19
0.021
2 - 211647Standard0.0080.203
4.32
0.0144
4.27
0.016
4.26
0.018
4.23
0.019
4.17
0.022
4.17
0.022
2 - 331355Alternate0.0080.203
4.16
0.0156
4.12
0.018
4.10
0.02
4.05
0.021
3.99
0.244
3.99
0.025
1 - 762846Standard0.0080.203
4.34
0.0142
4.30
0.016
4.28
0.018
4.25
0.019
4.14
0.022
4.14
0.022
2 - 211651Alternate0.0090.229
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
2 - 211654Standard0.010.254
4.18
0.0155
4.14
0.017
4.11
0.02
4.08
0.021
3.96
0.024
3.96
0.024
2 - 165243Alternate0.010.254
4.40
0.0137
4.36
0.015
4.34
0.017
4.32
0.018
4.21
0.021
4.21
0.021
2 - 165251Standard0.0120.305
4.24
0.015
4.19
0.017
4.17
0.019
4.14
0.02
4.03
0.023
4.03
0.023
2 - 1080 / 762848Alternate.0120.305
4.30
0.0145
4.25
0.016
4.24
0.018
4.21
0.019
4.09
0.022
4.09
0.022
2 - 762842Standard0.0140.356
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02
2 - 762846Standard0.0160.406
4.34
0.0142
4.30
0.016
4.28
0.018
4.25
0.019
4.14
0.022
4.14
0.022
2 - 1080/ 762841Alternate0.0180.457
4.44
0.0134
4.40
0.014
4.39
0.017
4.36
0.017
4.26
0.02
4.26
0.02
2 - 7628/ 211645Standard0.0180.457
4.36
0.0141
4.32
0.016
4.30
0.018
4.27
0.019
4.15
0.021
4.15
0.021
3 - 762842Standard0.0210.533
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02
3 - 762846Standard0.0240.61
4.34
0.0142
4.30
0.016
4.28
0.018
4.25
0.019
4.14
0.022
4.14
0.022
4 - 762842Standard0.0280.711
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02
4 - 762844Standard0.0310.787
4.38
0.0139
4.34
0.015
4.32
0.017
4.30
0.018
4.19
0.021
4.19
0.021
5 - 762842Alternate0.0350.889
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02
5 - 7628/ 211643Alternate
0.39
0.039
0.991
4.40
0.0137
4.36
0.015
4.34
0.017
4.34
0.018
4.24
0.02
4.24
0.02
6 - 762842Alternate0.0421.067
4.42
0.0136
4.38
0.015
4.36
0.017
4.34
0.018
4.24
0.02
4.24
0.02

Prepreg Data

ConstructionResin Content %Thickness (inch)Thickness (mm)Dielectric Constant (DK) / Dissipation Factor (DF)
100 MHz500 MHz1 GHz2 GHz5 GHz10 GHz
10676.0%0.00230.058
3.81
0.0188
3.75
0.0220
3.74
0.0250
3.70
0.0261
3.54
0.0311
3.54
0.0320
106770.0%0.00250.064
3.91
0.0180
3.85
0.0204
3.83
0.0236
3.79
0.0246
3.65
0.0293
3.65
0.0294
106775.0%0.00270.069
3.83
0.0187
3.77
0.0214
3.75
0.0243
3.71
0.0259
3.56
0.0310
3.56
0.0310
108066.0%0.00300.076
3.97
0.0173
3.92
0.0197
3.90
0.0226
3.86
0.0240
3.72
0.0280
3.72
0.0280
108663.0%0.00310.079
4.02
0.0169
3.95
0.0191
3.91
0.0219
3.91
0.0229
3.78
0.0270
3.78
0.0271
108068.0%0.00320.081
3.94
0.0177
3.89
0.0200
3.86
0.0231
3.82
0.0240
3.68
0.0290
3.68
0.0290
108665.0%0.00330.084
3.98
0.0172
3.94
0.0195
3.91
0.0224
3.88
0.0234
3.79
0.0276
3.74
0.0276
108667.0%0.00350.089
3.96
0.0175
3.90
0.0199
3.88
0.0239
3.84
0.0235
3.70
0.0283
3.70
0.0284
108071.0%0.00360.091
3.89
0.0181
3.84
0.0206
3.81
0.0238
3.77
0.0250
3.63
0.0296
3.63
0.0296
331355.0%0.00380.097
4.16
0.0156
4.12
0.0176
4.10
0.0201
4.05
0.0209
3.99
0.0244
3.99
0.0245
211359.0%0.00400.102
4.09
0.0163
4.04
0.0183
4.02
0.0210
3.99
0.0220
3.86
0.0260
3.86
0.0260
211656.0%0.00480.122
4.14
0.0158
4.10
0.0178
4.08
0.0203
4.04
0.0210
3.92
0.0250
3.92
0.0250
165251.0%0.00570.145
4.24
0.0150
4.19
0.0168
4.17
0.0191
4.14
0.0200
4.03
0.0230
4.03
0.0230
762845.0%0.00730.185
4.36
0.0141
4.32
0.0156
4.30
0.0177
4.27
0.0180
4.16
0.0210
4.16
0.0210
762850.0%0.00820.208
4.26
0.0149
4.24
0.0166
4.19
0.0189
4.16
0.0196
4.05
0.0228
4.05
0.0229
NOTE
Please Contact us for more details in below details.
Isola Group 3100 West Ray Road
Suite 301
Chandler, AZ 85226

Phone: 480-893-6527
Phone: 800-537-7656
Fax: 480-893-1409
11/19/2015
07/30/2013

Webinars, Videos & Articles

Making Sense of Laminate Dielectric Properties (Technical Paper)

This paper highlights the critical selection factors that go beyond a typical product data sheet and explains how these factors must be considered when selecting materials for high speed applications.

Conductive Anodic Filament Growth Failure (Technical Paper)

This paper provides describes Isola's work in finding the right combination of process and design conditions for improved CAF resistant products.

Laminate & Prepreg Manufacturing (Presentation)

This presentation describes the process of laminate and prepreg manufacturing.

PCB Material Selection for High-speed Digital Designs (Presentation)

This presentation describes PCB factors that limit high-speed digital performance and the PCB material selection process and Isola product solutions.

If you have any questions about 370HR, our pricing, or our support, or if you would like some general advice on using our materials, then please do call us or complete the form below. Your message will be routed directly to the product manager who will promptly reply to your inquiry.

We thank you for your interest in 370HR.

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