HDI 4 layers PCB with FR4 and ENIG finish
$32.90
This HDI 4 layers PCB is made of frequently used FR-4 material and uses ENIG surface finish to provide excellent surface flatness and anti-oxidation performance. It usually consists of two outer layers and two inner layers. The outer layers are usually signal layers, and the inner layers may be used for ground or power layers. HDI 4-layer circuit board is an ideal solution for advanced applications such as wearable devices, IoT, and other miniaturized electronics.
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| Layer Counts | 4L |
| Base Material | FR-4 |
| Board Thickness(mm) | 1.6 |
| Max board size(mm) | 570*850 |
| PCB size tolerance | ±0.3mm |
| Min. Hole Size | 0.15mm |
| Min. Line Width | 4mil |
| Copper Weight | 1oz |
| Surface Finish | ENIG |
| Certificate | UL, RoHS, ISO, and REACH |
HDI 4 layers PCB with FR4 and ENIG finish
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Questions & Answers
1.What is your lead time?
It usually takes 1–3 days for prototypes. For mass production, expect 7–15 days, depending on the order quantity and the design complexity.
2.What testing and inspection methods are implemented?
We utilize a range of inspection techniques, including AOI, x-ray inspection, functional testing, flying probe testing, and in-circuit testing.
3.What materials are available for HDI 4 layers PCB?
For a 4-layer HDI PCB, common substrate materials include FR4 for standard applications, polyimide for flexibility, and Rogers materials for high-frequency applications.
4.What surface finish is best?
With an HDI four-layer circuit board, ENIG is a good option for solderability and corrosion resistance. We also offer other options such as immersion silver, ENEPIG, or OSP.
5.What is a common stack-up for HDI 4 layers PCBs?
A typical HDI 4-layer stack-up is Signal-Ground-Ground-Signal, where each layer serves a specific function.
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