Buried Via PCB

Our advanced buried vias PCB technology enables ultra-compact multilayer boards with superior signal performance, trusted by aerospace, medical, and telecom industries.

Precision Buried Vias PCB Solutions for HDI Applications

We manufacture buried via PCB designs with laser-drilled blind vias and sequential lamination for maximum layer interconnection density.

Key Features:
✔ Buried vias fully encapsulated between inner layers (no surface exposure)
✔ Combined blind buried vias support for ultra-HDI designs
✔ PCB blind via fabrication process compliant with IPC-6012 Class 3
✔ Material options: FR-4, Rogers, Polyimide for high-frequency needs
✔ Traceability via MES system for quality assurance

What is a Buried Via PCB?

A buried via PCB contains copper-plated holes that connect internal layers only, invisible from the board’s surface.

How It Works:

Laser drilling creates micro-vias between specified inner layers.
Sequential lamination bonds layers while encapsulating vias.
Electroplating ensures conductivity between connected layers.

These steps are integrated into our PCB manufacturing process, ensuring precise via formation, reliable copper filling, and strict process control for high-layer-count HDI boards.

Buried Vias vs. Blind Vias vs. Through-Hole Vias

Feature	Buried Vias	Blind Vias	Through-Hole Vias
Layer Connection	Inner layers only	Outer → Inner layers	All layers
Fabrication Cost	$$$ (Highest)	$$	$
Best For	8+ layer boards	Space-saving HDI	Simple designs

Applications of Buried Via PCBs

Aerospace: Onboard avionics with vibration-resistant interconnects.
Medical Implants: Miniaturized, biocompatible PCB stacks.
High-Speed Computing: Reduced signal loss in server motherboards.

Our Buried Via PCB Manufacturing Process

Design Review: Verify via locations with your Gerber files.
Laser Ablation: Precise PCB blind via drilling (50–100µm).
Plating & Lamination: Copper filling and layer bonding.
AOI Testing: 3D X-ray inspection for void-free vias.

Why Choose 365 PCB for Buried Vias?

Military-Grade: ISO 9001, IPC-A-600, and IATF 16949 certified.
Fast Lead Time: 24-hour prototyping (industry-leading).
End-to-End Support: From PCB blind via fabrication to full box-build assembly.

For customers who require fully assembled high-density boards, our PCB assembly services extend to precision SMT placement for fine-pitch components, BGA assembly, and comprehensive functional testing—ensuring your buried via designs transition seamlessly from fabrication to deployment.