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- material properties
- Glass epoxy material properties
| Item | Test method ASTM |
Test conditions | Unit | Glass epoxy FR-4 |
||
|---|---|---|---|---|---|---|
| Properties | Specific gravity | D792 | - | - | 1.80 | |
| Water absorption rate | D570 | E24/50 +D24/23 |
- | 0.10 | ||
| Electrical properties | Withstand voltage | Normal temperature | D149 | D240/24 Short interval method |
MV/m | 29 |
| After immersion in water | 34 | |||||
| Edgewise withstand voltage | Normal temperature | D149 | Short interval method | MV/m | 6.6 | |
| Volume resistance | D257 | - | Ω･m | 1011 | ||
| Surface resistance | D257 | - | Ω | 1013 | ||
| Insulation resistance | Normal temperature | D257 | D2/100 | Ω | 1.0×1013 1.0×1012 |
|
| After boiling | ||||||
| Permittivity | D150 | 3GHz | - | 4.6 | ||
| Dissipation factor | D150 | 3GHz | - | 0.050 | ||
| Arc resistance | D495 | - | sec. | 120 | ||
| Tracking resistance | IEC 112 | - | V(CTI) | 350 | ||
| Type of electric insulation | IEC | - | - | F | ||
| Thermal properties | Thermal conductivity | C177 | - | W/(m･K) | - | |
| Thermal linear expansion coeffi cient |
Vertical Side |
D696 | 25-100℃ | 10-5/℃ | 2.1 | |
| Flammability | UL94 | - | - | V-0 | ||
| Solder resistance | UTK method | - | ℃/sec. | 260×120 | ||
| Deflection temperature under load | D648 | 1.82MPa | ℃ | 180 | ||
| Mechanical properties | Tensile hardness | Vertical Side |
D638 | Breaking | MPa | 300 |
| 270 | ||||||
| Tensile elongation | Vertical Side |
D638 | - | ％ | 3.0 | |
| Bending strength | Vertical Side |
D790 | Breaking | MPa | 720 | |
| 540 | ||||||
| Bending deformation rate | Vertical Side |
D790 | - | ％ | 4.1 | |
| 3.8 | ||||||
| Bending modulus of elasticity | Vertical Side |
D790 | - | GPa | 24.3 | |
| 20.0 | ||||||
| Shear strength | D732 | - | MPa | - | ||
| Izod impact strength | D256 | With notch | J/m | 588 | ||
| Rockwell hardness | D785 | R scale | - | 120 | ||
| Item | Test method | Treatment conditions | Unit | Glass epoxy CEM-3 |
|
|---|---|---|---|---|---|
| Specific gravity | JIS K 6911 | A | - | 1.5-1.7 | |
| Water absorption rate | JIS C 6489 | E24/50 | ％ | 0.25 | |
| +D24/23 | |||||
| Flatwise withstand voltage | JIS K 6911 | C90/20/65 | kV/mm | 18-30 | |
| Edgewise withstand voltage | JIS K 6911 | O0.5/90 | kV | - | |
| Insulation resistance | Normal state | - | C90/20/65 | Ω | 1×1013to1×1014 |
| After boiling | - | D2/100 | Ω | 1×1012to1×1013 | |
| Permittivity(1MHz) | Normal state | - | C90/20/65 | - | 4.2-4.7 |
| After water absorption | - | C90/20/65 | - | 4.4-4.9 | |
| - | +D48/50 | ||||
| Dissipation factor(1MHz) | Normal state | - | C90/20/65 | - | 0.018-0.023 |
| After water absorption | - | C90/20/65 | - | 0.022-0.025 | |
| - | +D48/50 | ||||
| Bending strength | - | A | N/mm | 300-450 | |
| Compression strength | Perpendicular to layer | - | A | N/mm | - |
| Parallel to layer | - | A | N/mm | - | |
| Izod impact strength(Parallel to layer) | - | A | J/cm | - | |
| Cleavage strength | - | A | kN | - | |
| Heat resistance | - | A | - | 150℃ 120 mins. No problems |
|
| Acetone resistance | - | A | - | Boiling 30 mins. No problems |
|
| Heat resistance(UL94) | - | A | - | V-0 | |
| Correct punching temperature | - | A | ℃ | 15-60 | |
| Item | Unit | Glass epoxy CEM-3 |
||
|---|---|---|---|---|
| Temperature rating | Electrical | ℃ | 130 | |
| Mechanical | ℃ | 140 | ||
| Flammability | - | 94V-0 | ||
| Hot wire ignitability | secs. | 120+ | ||
| High-current arc ignitability | Times | 200+ | ||
| High-voltage arc tracking | in/mins. | 0 | ||
| Tracking resistance | - | 230 | ||
Note: The numeric values above are typical values. They are not standard values.