20-Layer High-Speed PCB | TU872LK Communication Backplane

In the era of exploding data center traffic and widespread 5G deployment, 伝統的 プリント基板材料 can no longer support 25Gbps or 112Gbps high-speed signal transmission. When Signal Integrity (そして) and Power Integrity (PI) become major design hurdles, 高性能の 20-層高速PCB emerges as the essential tool for hardware engineers.

UGPCB utilizes advanced manufacturing and strict material control to offer the 20-layer high-speed PCB (Communication Backplane) . Featuring high-end TUC/TU872LK material, combined with blind via and hard gold technology, it provides exceptional physical support for servers, core routers, and aerospace equipment. This article details the technical features and core value of this product.

1. 製品の概要: What is a 20-Layer High-Speed PCB?

A PCB is the foundation of electronic products . As systems demand higher speeds and densities, standard 2-layer or 4-layer boards struggle with impedance control and EMI shielding.

UGPCB 20-layer high-speed PCB consists of 20 conductive copper layers laminated with Prepreg and Core . Designed specifically as a communication backplane, it manages data transmission and power distribution between line cards. This is a high-end solution for low-loss transmission and complex system integration.

2. デザイン & 材料: The Superiority of TU872LK

高品質 多層PCB relies on both intelligent design and premium materials. UGPCB adheres to strict high-speed design rules:

Stackup Design: The 20-layer structure ensures tight coupling between signal and ground planes. Critical high-speed signals are embedded as striplines for optimal EMC performance . Multiple ground planes effectively reduce PDN impedance .
Material Selection—TUC/TU872LK:
For signals above 10Gbps, standard FR-4 suffers from high dielectric loss. UGPCB selects TU-872LK, a high-performance modified epoxy from TUC, に最適です 高速デザイン .
- 低損失: Its Dissipation Factor (Df) is extremely low (< 0.009 10ghzで), ensuring signal integrity across complex 20-layer paths .
- High Thermal Reliability: With a Tg of 220°C (DMA), it guarantees dimensional stability and CAF resistance during lamination and operation .

3. 構造 & 作業原則

これ blind and buried via PCB operates on transmission line theory. High-speed signals use adjacent reference layers (GND) for a clear return path, creating uniform impedance.

Structural Feature:
- Blind Via Technology: The design includes L3-L20 blind vias . These vias start at layer 3 and stop at layer 20, saving routing space and reducing signal-reflecting stubs—a key process for high-speed interconnects on communication backplane PCBs .
Physical Specifications:
- 仕上がり厚さ: The 5.0mm thickness and 1OZ copper provide the mechanical strength needed to support heavy connectors during backplane insertion .

4. Core Performance and Precision Manufacturing

UGPCB demonstrates advanced capabilities with this 20-layer hard gold circuit board:

Fine Line Capability: Minimum line width/space is 4mil/4mil . Achieving this on a 5.0mm thick board is a challenge that UGPCB meets with LDI technology.
Surface Finish—Hard Gold: Utilizing a Hard Gold 3-15U process .
- Unlike soft gold, hard gold includes elements like cobalt for higher wear resistance.
- これは、 communication PCBs. Backplanes connect via gold fingers that endure frequent insertion cycles. Hard gold ensures long-term contact reliability.
プロセスフロー:
材料の準備 (TU872LK) → Inner Layer Imaging (4ミル) → あおい → Layup (20-層積層) → 掘削 (L3-L20 Blind Vias) → Plating → Outer Layer Imaging → Hard Gold → Solder Mask → Profiling → Testing.

5. Classification and Applications

This product fits precise industry classifications:

レイヤーカウントごとに: 20-Layer Multilayer PCB
素材によって: High-Speed Digital PCB (Low Loss Material)
プロセス別: 盲目 & Buried Via Board
アプリケーションによって: Communication Backplane PCB / System Motherboard

典型的なアプリケーション:

Core Switches & ルーター: Acts as a chassis backplane handling 400G/800G data traffic.
5Gベースステーション: Supports high-speed interconnects in Baseband Units.
高性能コンピューティング (HPC): Ensures signal integrity for PCIe channels in servers.

20-Layer High-Speed UGPCB for High-Performance Computing (HPC) Applications including Server Motherboards and Storage Backplanes

6. UGPCBを選択する理由?

Manufacturing a 20-layer high-speed PCB tests material properties, lamination alignment, and drilling accuracy.

Precision Impedance Control: Leveraging TU872LK’s Dk/Df properties, we control impedance tolerance to within ±5% .
Hard Gold Process: Our controlled plating ensures uniform gold thickness (3-15u) and a corrosion-resistant nickel layer, supporting thousands of insertion cycles.
Full Traceability: Every board meets communication-grade standards, verified through strict quality checks from material to delivery.

Get a Quote Today

If you are seeking a reliable partner for high-layer, high-speed backplanes capable of handling 112G/224G SerDes signals, UGPCB is your trusted choice.

[お問い合わせ] for a quote.