A 6-Layer Rigid-Flex PCB is an advanced placa de circuito impreso technology that integrally combines rigid board stability with flexible circuit dynamic bending capability. This product from UGPCB utilizes a premium adhesive-free lamination proceso, resulting in a final board thickness of 1.50milímetros, dimensions of 120x80mm, and features an ACEPTAR (Oro de inmersión de níquel químico, 3μ”) acabado superficial. It represents a cutting-edge solution for Interconexión de alta densidad (IDH) and three-dimensional electronic packaging, solving complex spatial and mechanical challenges in modern electronics.
Scientific Product Classification
According to IPC-6013D standards and product construction, this board is accurately classified as:
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By Construction: Rigid-Flex Printed Board (Tipo 4)
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Por recuento de capas: Six-Layer Board (combining rigid and flexible layers)
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Por tecnología: Adhesive-less (Adhesive-Free) Flexible Material Rigid-Flex PCB
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Por aplicación: High-Reliability, High-Flex-Cycle Industrial & Medical Grade PCB
Core Structure & Materiales
The exceptional performance is rooted in its sophisticated layered structure and top-tier materials:
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Core Flex Material: Características Shengyi’s 18/50/18 μm adhesive-free double-sided substrate. “18/50/18” denotes a structure of 1 onz (18μm) cobre / 50μm Polyimide (PI) dielectric / 1 onz (18μm) cobre. El adhesive-free construction bonds copper to PI chemically, eliminating adhesive layers, which significantly enhances thermal resistance, chemical resistance, y flex circuit fiabilidad.
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Rigid Section Material: Uses 25/25 preparar for lamination in rigid areas, providing robust mechanical support.
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Acabado superficial: The entire board employs ACEPTAR (3μ”). This 3-microinch gold layer offers excellent flatness, oxidation resistance, and solderability for PCB pads, making it ideal for assembling fine-pitch components like BGAs.
Design Key Considerations & Principio de trabajo
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:
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Bend Area Definition: Clearly distinguish between static (one-time install) y 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).
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Transition Zone Reinforcement: The rigid-to-flex junction is a stress point. Use teardrop pads, curved traces, y stiffeners to prevent delamination and cracking.
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Control de impedancia: For high-speed signals (p.ej., differential pairs) crossing flex areas, precisely calculate trace width and dielectric thickness to maintain consistent impedancia característica (p.ej., 50Ω de un solo extremo, 100Ω diferencial).
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Flex Routing Rules: In flexible areas, route conductors perpendicular to the bend axis. Use curved or staggered traces to distribute stress evenly.
Características de rendimiento & Ventajas
Compared to traditional adhesive-based rigid-flex PCBs or rigid-board+connector assemblies, this UGPCB product offers distinct PCB advantages:
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Confiabilidad mejorada: 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 dynamic bend cycles.
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Rendimiento eléctrico superior: Uniform PI dielectric with stable dielectric constant (Dk~3.4) ensures signal integrity for high-frequency applications and reduces loss.
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Lightweight & Alta densidad: Eliminates connectors, cables, and solder joints, enabling 3D assembly. Can reduce system weight by up to 60% and save over 50% espacio.
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Excellent Durability: Resists extreme temperatures (-55°C to +125°C) and chemical exposure, adecuado para entornos hostiles.
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Simplified Assembly: A single integrated component reduces assembly steps, potential failure points, and improves final product yield.
Descripción general del proceso de producción
UGPCB rigid-flex PCB manufacturing combines advanced rigid PCB fabrication y flexible circuit production procesos:
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Inner Layer Fabrication: Separate etching of rigid FR-4 and flexible PI core layers.
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Laminación: 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 multicapa tratamiento.
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Perforación & Enchapado: Mechanical and laser drilling (if needed) followed by copper deposition and plating to create Agujeros pasantes chapados (PTH) for interlayer connection.
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Outer Layer Imaging & Aguafuerte: Pattern formation for outer layer circuits.
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Surface Finish Application: ENIG chemical deposition.
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Coverlay & Profiling: Application of protective film (coverlay) on flex areas. Precise enrutamiento y laser cutting define the board outline and flex section openings.
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Prueba eléctrica & Inspección final: 100% sonda voladora or fixture testing for electrical continuity, followed by rigorous visual and dimensional inspection.
Aplicaciones primarias & Casos de uso
Este 6-layer high-reliability PCB is the ideal choice for demanding applications:
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Aeroespacial & Defense: Satellite deployment mechanisms, guidance systems, avionics sensors requiring utmost reliability and weight reduction.
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Advanced Medical Devices: Endoscopes, ultrasound probes, wearable monitors needing complex motion and signal transmission in minimal space.
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Industrial Robotics: Robot joints, internal robotic arm assemblies for seamless power/signal transmission across moving parts.
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Precision Instruments & Electrónica de Consumo: Advanced camera modules, foldable display hinges, drone gimbals pursuing slimness and durability.
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Electrónica automotriz: 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.