Rigid Flex Printed Circuit Board 4 Layer Used In Camera Module

• Main Features:

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.

• FAQ:

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

Witgain Technology Limited was established in 2007. Factories locate in HuiZhou City and marketing locates in ShenZhen City. The total area of two factories is around 10000 square meters. We can offer 2-layer and multi-layer pcb services to our customers, highest to 24 layers and rigid-flex pcb, ceramic pcb, HDI pcb, heavy copper pcb are also included. To meet our customer's diversified demands, we also accept prototype orders, small batch orders and big batch orders. Quality and technology is what we value most and we will never stop improving our capabilities. Our customers' satisfaction is always what we are seeking for.