Rigid Flex Printed Circuit Board 4 Layer Used In Camera Module
1 Rigid flexible pcb, FR4 and polymide material laminated together.
2 10 Layer pcb, L1&L4 are rigid layers. L3-L2 are flexible layers.
3 Finished pcb board size is 1.2mm.
4 Copper thickness is 1/H/H/1 OZ.
5 Min hole size is 0.2mm.
6 Min line space and width is 3/3mil.
7 Surface treatment is immersion gold 1u'.
8 The production cost will be higher than normal multilayer pcb and lead time will also be longer.
9 Min BGA size is 10mil.
10 Used in camera module in mobile phones or computers.
Q1:Immersion Silver (ImAg) PCB Surface Finish
A1:Immersion silver (ImAg) is a metallic coating of pure silver (0.1 to 0.4 μm), which acts as a preservative for the copper traces on a printed circuit board. It is a combination of 99% Ag metal with traces of organic material. With time, ImAg forms Sulfide Dendrites that cause a shorting problem. This problem can be avoided by applying a thin organic coat, which acts as a barrier.
An Immersion silver (ImAg) finish on a PCB is suitable for the applications that include flat surfaces like membrane switches, EMI shielding, aluminum wire bonding, and very fine traces.
Properties of Immersion Silver Surface Finish:
- Shelf-life: 6 to 12 months
- Offers good solderability
- Due to its planarity (flatness), suitable for fine-pitch/BGA/Small components placement
- Offers good solderability after exposure to various thermal cycles (more than 2)
- Suitable for high-frequency applications
Limiting Properties of Immersion Silver Surface Finish:
- Sensitive to handle and sensative to contaminants
- Has a solder whiskering issue
- Difficult for electric testing
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0.6 MM Rigid Flex Printed Circuit Board OEM 4 Layer Camera Module PCB Images
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