Halogen free coverlay (CVL) is a kind of high temperature thermosetting epoxy resin coated with polyimide film. Then, the insulating coating is made of release paper as insulation layer and cured by high temperature. The series of materials are widely used in FPC manufacturing for line protection and insulation.
·产品结构及系列Product Structure and Series
产品结构 Product structure | 产品系列 Product serides | 说明Instruction |
Pi膜 PI Film 环氧树脂 Adhesive 离型纸 Release Paper | 黄色覆盖膜Yellow CVL 黑色覆盖膜Black CVL | 所有覆盖膜系列产品均可按照客户要求进行胶层涂布,胶层厚度范围13um-75um。 |
·产品规格 Product Specifications
Item(项目) | Test method(测试方法) | Specification(规格) |
Width(幅宽) | Specification | 250±1mm |
Polyimide thickness(PI厚度) | Specification | 12.5um、25um |
Adhesive thickness(胶层厚度) | Specification | 15-25um |
Shelf life(保质期) | <10℃, <65%RH | 3months |
23℃±3℃, <65%RH | 10days |
·产品性能 Product Properties
Item(项目) | Test method (测试方法) | Specification (规格) | |
Peel strength(剥离强度) | IPC TM650 2.4.9 | ≧0.5kgf/cm | |
Adhesive flow(溢胶量) | IPC TM650 2.3.17.1 | ≦0.2mm | |
Solder Float Resistance(耐焊性) (after 165℃±5℃ 1hr) ( 165℃±5℃烘烤1小时后) | IPC TM650 2.4.13 | 288℃ 10sec | |
Dimensional stability (尺寸稳定性) | IPC TM650 2.2.4 | TD≦±0.2% | |
MD≦±0.2% | |||
Chemical resistance (耐化学品性) | MEK 5min(丁酮浸泡5分钟测试) | IPC TM650 2.3.2 | No evident of defects |
HCl 5% 5min(5%盐酸溶液浸泡5分钟测试) | |||
NaOH 5% 5min(5%氢氧化钠溶液浸泡5分钟测试) | |||
Surface Resistivity(Ω) (表面电阻率) | IPC TM650 2.5.17 | ≧1.0*1011Ω | |
Volume Resistivity(Ω.cm) (体积电阻率) | IPC TM650 2.5.17 | ≧1.0*1012Ω.cm |
·产品应用 Product Application
该系列产品广泛应用于FPC制造,以作线路保护及绝缘层。
The series of materials are widely used in FPC manufacturing for line protection and insulation.