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Polyimide(PI)Coverlay is made of polyimide film coated by modified stage-B acrylic or epoxy adhesive on single side or double sides with
protection release film or paper. PI Coverlay is widely used in protection of FPCB.
Characters:
* Excellent dielectric performance,high bondability and good dimension stability;
* Low fluidility and good processability;
* Supplied with different sizes and colours(yellow,black,white);
NOTE: Please just contact us for customized polyimide bondply and stiffener of this material
Spec.:
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Items
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Unit
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CPI-10
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CPI-20
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CPI-30
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CPI-50
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Typical thickness
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mm±10%
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0.05
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0.075
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0.10
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0.15
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Film thickness
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mm
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0.025(1mil)
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0.05(2mil)
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0.075(3mil)
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0.125 (5mil)
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Adhesive thickness
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mm
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0.025
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0.025
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0.025
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0.025
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Nominal weight
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g/m2±10%
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60
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100
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130
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200
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Supply sizes & packing: standard roll: 50 square meters per roll,width:500mm; carton after winded up
into log roll and sealed by plastic film bag,core size:3"(76mm)
Note:customizations also available
Typical properties(the follows are just examples not read as guaranteed values)
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Items
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unit
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Test method
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Typical datas
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1. peel Strength
-As normal conditions
After Soldering
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N/mm--width
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IPC-TM-650-2.4.9
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1.05
1.05
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2.Dimension Stability
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%
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IPC-TM-650-2.2.4A
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0.12
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3.Adhesive flow max.
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mil/mil
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IPC-TM-650-2.3.17.1
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4.3:1
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4. Volatile Content
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%
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IPC-TM-650-2.3.37
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≤3.0
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5. Soldering float
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288℃/10sec.
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IPC-TM-650-2.4.13
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pass
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6. Moisture Absorption
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%
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IPC-TM-650-2.6.2
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≤4.0
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7. Dielectric strength
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kv/mm
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ASTM-D-149
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≥78.8
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8. Chemical resistance
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%
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IPC-TM-650-2.3.2
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≥80
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9. Dielectric constant
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MHZ
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IPC-TM-650-2.5.5.3
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≤4.0
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10.Dissipation factor
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----
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IPC-TM-650-2.5.5.3
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≤0.04
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11. Volume resistivity
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MΩ-cm
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IPC-TM-650-2.5.17
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108
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12. Surface resistivity
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MΩ
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IPC-TM-650-2.5.17
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106
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Sotrage: keep dry and cool, Shelf life:12 months
Application: Polyimide Coverlay is mainly used in protection of flexible printed circiut board and other relevant fields.
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