The 4+N+4 HDI PCB Stackup provides the ultimate interconnect architecture for complex, high-density digital designs. Featuring four sequential build-up layers of high-density interconnects on both sides of a central core ($N$), this configuration enables seamless routing of ultra-fine pitch components. By utilizing laser-drilled microvias, stacked vias, and buried vias, this ultra-dense multilayer build-up significantly reduces layer count while optimizing electrical performance and minimizing signal cross-talk in high-speed applications.
Key Features of 4+N+4 HDI PCB
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Advanced Interconnect Architecture: Structured as a 4+N+4 HDI PCB build-up to accommodate dense, fine-pitch BGAs ($<0.4\text{ mm}$).
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Via Technology: Supports stacked, staggered, buried, and blind microvias with copper-filled via-in-pad processing.
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Material Options: Available in High-Tg FR-4, halogen-free materials, and low-loss high-speed laminates (e.g., Rogers, Megtron).
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Precision Specs: Minimum line width/spacing down to $3\text{ mil}$ ($0.075\text{ mm}$) and microvia diameters down to $4\text{ mil}$ ($0.1\text{ mm}$).
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Quality Standards: Fully compliant with IPC-Class 2 and IPC-Class 3 manufacturing standards.
Applications
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Consumer Electronics: Smartphones, wearables, and ultra-thin laptops requiring maximum component density.
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Telecommunications: 5G wireless modules, high-speed routers, and network interface cards.
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Computing & Storage: High-performance computing (HPC) motherboards, AI accelerators, and solid-state drives (SSDs).
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Medical Systems: Compact diagnostic equipment, handheld imaging devices, and implantable monitoring systems.
Why Choose PCBSYNC
PCBSYNC is a professional PCB fabrication, PCBA, and EMS manufacturer delivering precision-built electronics for aerospace, medical, automotive, industrial, and smart energy applications. We handle everything from rapid prototyping to mass production — including rigid, flexible, and rigid-flex PCBs, full turnkey assembly, component sourcing, AOI and X-ray inspection, and OEM/ODM support. Reliable boards. Consistent quality. From prototype to production — PCBSYNC.
Partner with an experienced manufacturer for your next high-density project. Contact our engineering team today to review your Gerber files or request an accurate fabrication quote.
