| All data is for information only------(<---links) | |
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| PRODUCT DATA of FR4 type GFN | 
| Material | FR4 type GFN | 
| Product Type | epoxy glass sheet IPC4101/21 | 
| Chemical Composition | epoxy laminate | 
| Name of Manufacturer | Polyclad Europe | 
| ELECTRICAL PROPERTIES | 
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| Dielectric Constant | 4.4 to 4.8 | 
| THERMAL PROPERTIES | 
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| Thermal Expansion Coefficient | 180 μstrain/°C Remark:measured in Z-direction in X, Y direction CTE=14-18 | 
| Glass Transition Temperature | 135 °C | 
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY | 
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| Flammability | UL-94 Classification V-0 | 
| Outgassing Status | Pass | 
| Outgassing | TML = 0.42%, RML = 0.18%, CVCM = 0.00% |