FR-4 / FR-5 is a composite made of electronic glass cloth and epoxy resin with the features of fine insulation, good rigidity, low water absorption, acid and alkali resistance, and ease of machinability. Flame Resistance 94V0
FR-4 / FR-5 is a composite made of electronic glass cloth and epoxy resin with the features of fine insulation, good rigidity, low water absorption, acid and alkali resistance, and ease of machinability. Flame Resistance 94V0
| NEMA Grade | FR4 | FR5 | |
| Color
顏色 |
綠 Green
黃 Yellow |
黃 Yellow | |
| Characteristic
特性 |
Good Insulation | Good Insulation High Temperature Resistance | |
| Dielectric Perpendicular to Laminations
by Voltage (In 1 min) 貫層 1 分間耐電壓 |
KV/mm |
15~20 | 15~20 |
| Dielectric Breakdown Perpendicular to Lamination
貫層破壞電壓 |
KV/mm | 15~20 | 23~33 |
| Volume Resistance
體積電阻 |
Ω-cm | >1012 | >1012 |
| Surface Resistance
表面電阻 |
Ω | >1012 | >1012 |
| Flexural Strength
彎繞強度 |
Kg/mm2 | 35~45 | 35~45 |
| Compressive Strength
壓縮強度 |
Kg/mm2 | 20~40 | 20~40 |
| Impact Strength 衝擊強度經向 Lengthwise
緯向 Crosswise |
Kg-cm/cm2 |
68~78 35~45 |
68~78 35~45 |
| Specific Gravity
比重 |
– | 1.85~2 | 1.85~2 |
| Glass Transition Temperature
玻璃轉化溫度 |
℃ | 160~170 | 120~130 |
| Water Absorption
吸水率 |
% | <0.2 | <0.2 |
| Heat Resistance
耐熱性 |
℃ | 200℃ /2Hrs | 260℃>60 Min.
288℃>30 Min |
| Flame Resistance
耐燃性 |
– | V0 | V0 |