FactoryXiangyuan(Tianjin)
Insulation Materials Co.,Ltd.
AddressNo.8 Baohei Road Koudong
Town Baodi District Tianjin City China
Zip Code301800
Tel 86-22-22566828
     86-22-22568680
Fax: 86-22-22567902
Mobile: 86-13752599392(王振波)
        86-13902126892(王作祥)
E-Mail: 13752599392@139.com


Branch FactoryXiangyuanShenzhen
Insulation Materials Co.,Ltd.

AddressBeside 107 County Road in Bao'an District,Shenzhen
Tel 86-755-27678318
Fax 86-755-29566119
BACK
Polyimide Coverlay

    Polyimide Coverlay composites are made of polyimide film, coated with a B-staged modified acrylic adhesive on one side. It has flame-retardant silicon adhesive coated paper or polypropylene film as its isolating layer. Coverlay is used to encapsulate etched details in flexible and rigid-flex multilayer constructions for environmental and electrical insulation.

Typical Data:
    All the polyimide coverlay is certified to IPC specifications and tested according to IPC Test Method TM-650. See Table 2.

  Property to be tested

Unit
IPC Specification
Typical value

  1. Anti-peel strength 
     Normal
     Dipping after welding

N/m –width
(lb/in width)


≥1400 [7.9942]
≥1225 [6.9949]


1520 [8.6794]
1400 [7.9942]

  2. Dimensional Stability

%
≤0.20
0.10

  3. Resin Flow

mil/mil
(adhesive thickness)
≤5:1
3.6:1

  4. Volatile Content

%
≤4.0
3.6

  5. Solder float

288℃/10sec
Pass
Pass

  6. Moisture Absorption

%
≤4.0
2.3

  7. Dielectric strength

kV/mm
≥78.84
130

  8. Chemical resistance

%
≥80
90

  9. Dielectric constant

----
≤4.0
3.5

  10. Dissipation factor

----
≤0.040
0.02

  11. Volume resistivity

MΩ-cm (Damp heat)
≥106
108

  12. Surface resistivity

MΩ(Damp heat)
≥105
106
 
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