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Ms. Shelby Luo
Senin için ne yapabilirim?
FR4, bir malzemenin adı değil, yangına dayanıklı bir çeşittir, bu da reçine malzemelerinin ateşlenirken kendi kendine söndürebileceğini temsil eder. Şimdi PCB olarak kullanan her türlü FR4 malzemesi vardır, ancak çoğunlukları epoksi reçine, dolgu ve fiberglastan oluşur.
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FR4 sheet
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Properties
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Unit
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Grade
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FR-4,Grade A
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Flexural strength perpendicular to laminations (A: under normal conditions E-1/150: 150±5 °C . Thickness:≥1.6mm)
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≥
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Mpa
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340
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Compression strength perpendicular to laminations
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≥
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Mpa
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350
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Impact Strength parallel to laminations (Charpy,Thickness:≥5mm)
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≥
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kJ/m2
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33
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Insulation Resistance after immersion in water (D-24/23)
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≥
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Ω
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5.0×108
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Dielectric strength perpendicular to laminations (in 90±2°C transformer oil, 1 mm in thickness)
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≥
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MV/m
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11.8
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Breakdown voltage parallel to laminations (in 90±2°C transformer oil)
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≥
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KV
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35
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Permittivity (50MHz)
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≤
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-
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5.5
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Dissipation factor (50Hz)
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≤
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-
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0.035
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Water absorption (D-24/23, 3mm in thickness)
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≤
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mg
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20
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Density
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g/cm3
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2.0
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Flammability
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Class
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V-0,V-1
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Color
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-
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Natural
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.