PTFE CCL sheet
Pure PTFE sheet and PTFE glass cloth laminated sheet. Single-sided copper foiled or two sides foiled. Or one side copper foiled or the other side lined aluminum or copper by high temperature, high pressure, baking, sintering process. With excellent electrical performance and good mechanical strength of the microwave dielectric printed circuit board.
Dielectric constant: 2.55, 2.6, 2.9, 3.0
Size:1200×480,860×550,660×440,490×490,550×430,410×440,430×360,300×250mm
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Properties
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Unit
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Value
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Density
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g/cm2
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2.2 2.3
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Water absorption
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%
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≤0.02
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Operating temperature
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°C
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-60 - +260
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Dielectric Loss Tangent, 10 GHz
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tgδ
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≤1 x 10-3
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Shrinkage
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%
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0.0002
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Heat Conduction Coefficient
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Kcal/m/hour °C
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0.8
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Linear Expansion Coefficient
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×1
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≤5x10-5
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Surface electric strength
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= 1mm (kv/mm)
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≥1.2 in normal condition
≥1.1 in constant and damp condition
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Bulk resistance
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M cm
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≥1x10-6 in normal condition
≥1x10-5 in constant and damp condition
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Surface Insulation Resistance, 500V direct current
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M.
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≥1x10-4 in normal condition
≥1x10-3 in constant and damp condition
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Resistance between Plugs, 500V direct current
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M.
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≥1x10-5 in normal condition
≥1x10-3 in constant and damp condition
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