6 Fabricação de PCB Rigid-Flex em Camada | Design sem adesivo de alta confiabilidade – UGPCB

UGPCB 6-Layer Adhesive-Free Rigid-Flex PCB Visão geral do produto & Definição

A 6-Layer Rigid-Flex PCB is an advanced placa de circuito impresso technology that integrally combines rigid board stability with flexible circuit dynamic bending capability. This product from UGPCB utilizes a premium adhesive-free lamination processo, resulting in a final board thickness of 1.50milímetros, dimensões de 120x80mm, and features an CONCORDAR (Ouro de imersão em níquel eletrolítico, 3eu”) acabamento superficial. It represents a cutting-edge solution for Interconexão de alta densidade (IDH) and three-dimensional electronic packaging, solving complex spatial and mechanical challenges in modern electronics.

Classificação Científica de Produtos

According to IPC-6013D standards and product construction, this board is accurately classified as:

• Por Construção: Rigid-Flex Printed Board (Tipo 4)

• Por contagem de camadas: Six-Layer Board (combining rigid and flexible layers)

• Por tecnologia: Adhesive-less (Adhesive-Free) Flexible Material Rigid-Flex PCB

• Por aplicação: High-Reliability, High-Flex-Cycle Industrial & Medical Grade PCB

Estrutura Central & Materiais

The exceptional performance is rooted in its sophisticated layered structure and top-tier materials:

• Core Flex Material: Características Shengyi’s 18/50/18 μm adhesive-free double-sided substrate. “18/50/18” denotes a structure of 1 onças (18μm) cobre / 50μm Polyimide (PI) dielectric / 1 onças (18μm) cobre. O adhesive-free construction bonds copper to PI chemically, eliminating adhesive layers, which significantly enhances thermal resistance, resistência química, e flex circuit confiabilidade.

• Rigid Section Material: Usos 25/25 pré-impregnado for lamination in rigid areas, providing robust mechanical support.

• Acabamento superficial: The entire board employs CONCORDAR (3eu”). This 3-microinch gold layer offers excellent flatness, resistência à oxidação, and solderability for PCB pads, making it ideal for assembling fine-pitch components like BGAs.

Design Key Considerations & Princípio de funcionamento

Rigid-flex PCB design is critical for success. The board operates by routing electrical signals through flexible polyimide areas for dynamic movement, while using rigid FR-4 sections for component mounting and structural support.

Essential Design Guidelines Include:

1. Bend Area Definition: Clearly distinguish between static (one-time install) e dynamic (repeated operation) bend zones. Design the bend radius accordingly. A dynamic bend radius should be at least 10x the flex area thickness (for this board, ≥15mm is recommended).

2. Transition Zone Reinforcement: The rigid-to-flex junction is a stress point. Usar almofadas de lágrima, curved traces, e stiffeners to prevent delamination and cracking.

3. Controle de impedância: For high-speed signals (por exemplo, differential pairs) crossing flex areas, precisely calculate trace width and dielectric thickness to maintain consistent impedância característica (por exemplo, 50Ω de terminação única, 100Ω diferencial).

4. Flex Routing Rules: In flexible areas, route conductors perpendicular to the bend axis. Use curved or staggered traces to distribute stress evenly.

Características de desempenho & Vantagens

Comparado ao tradicional adhesive-based rigid-flex PCBs or rigid-board+connector assemblies, this UGPCB product offers distinct PCB advantages:

• Confiabilidade aprimorada: The adhesive-free structure prevents delamination risks from adhesive aging or moisture absorption, increasing flex life by up to 10x and withstands over 100,000 ciclos de curvatura dinâmicos.

• Desempenho elétrico superior: Uniform PI dielectric with stable dielectric constant (Dk~3.4) ensures signal integrity for high-frequency applications and reduces loss.

• Leve & Alta densidade: Eliminates connectors, cabos, and solder joints, enabling 3D assembly. Can reduce system weight by up to 60% and save over 50% espaço.

• Excellent Durability: Resists extreme temperatures (-55°C a +125°C) and chemical exposure, suitable for harsh environments.

• Simplified Assembly: A single integrated component reduces assembly steps, potential failure points, and improves final product yield.

Visão geral do processo de produção

UGPCB's rigid-flex PCB manufacturing combines advanced rigid PCB fabrication e flexible circuit production processos:

1. Inner Layer Fabrication: Separate etching of rigid FR-4 and flexible PI core layers.

2. Laminação: Precise alignment and high-temperature/pressure bonding of rigid layers, adhesive-free flex cores, and prepreg into a monolithic structure—a critical step in PCB multicamadas processing.

3. Perfuração & Revestimento: Mechanical and laser drilling (if needed) followed by copper deposition and plating to create Plated Through Holes (PTH) for interlayer connection.

4. Imagem da camada externa & Gravura: Pattern formation for outer layer circuits.

5. Aplicação de acabamento superficial: ENIG chemical deposition.

6. Coverlay & Perfil: Application of protective film (coverlay) on flex areas. Preciso roteamento e corte a laser define the board outline and flex section openings.

7. Teste Elétrico & Inspeção Final: 100% sonda voadora or fixture testing for electrical continuity, followed by rigorous visual and dimensional inspection.

Aplicações primárias & Casos de uso

Esse 6-layer high-reliability PCB is the ideal choice for demanding applications:

• Aeroespacial & Defesa: Satellite deployment mechanisms, sistemas de orientação, avionics sensors requiring utmost reliability and weight reduction.

• Advanced Medical Devices: Endoscópios, ultrasound probes, wearable monitors needing complex motion and signal transmission in minimal space.

• Industrial Robotics: Robot joints, internal robotic arm assemblies for seamless power/signal transmission across moving parts.

• Precision Instruments & Eletrônicos de consumo: Advanced camera modules, foldable display hinges, drone gimbals pursuing slimness and durability.

• Eletrônica Automotiva: Automated parking sensors, foldable dash displays, in-vehicle camera modules resistant to vibration and thermal cycling.

Ready to integrate superior reliability into your design? Contact UGPCB engineers today for a free design review and quote on your custom 6-Layer Rigid-Flex PCB solution.