A 6-Layer Rigid-Flex PCB is an advanced печатная плата technology that integrally combines rigid board stability with flexible circuit dynamic bending capability. This product from UGPCB utilizes a premium adhesive-free lamination процесс, resulting in a final board thickness of 1.50мм, размеры 120x80mm, and features an СОГЛАШАТЬСЯ (Химическое никель, иммерсионное золото, 3μ”) обработка поверхности. It represents a cutting-edge solution for Взаимодействие высокой плотности (ИЧР) and three-dimensional electronic packaging, solving complex spatial and mechanical challenges in modern electronics.
Классификация научной продукции
According to IPC-6013D standards and product construction, this board is accurately classified as:
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By Construction: Rigid-Flex Printed Board (Тип 4)
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По количеству слоев: Six-Layer Board (combining rigid and flexible layers)
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По технологиям: Adhesive-less (Adhesive-Free) Flexible Material Rigid-Flex PCB
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По приложению: High-Reliability, High-Flex-Cycle Industrial & Medical Grade PCB
Core Structure & Материалы
The exceptional performance is rooted in its sophisticated layered structure and top-tier materials:
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Core Flex Material: Функции Shengyi’s 18/50/18 μm adhesive-free double-sided substrate. “18/50/18” denotes a structure of 1 унция (18мкм) медь / 50μm Polyimide (ПИ) dielectric / 1 унция (18мкм) медь. The adhesive-free construction bonds copper to PI chemically, eliminating adhesive layers, which significantly enhances thermal resistance, химическая устойчивость, и flex circuit надежность.
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Rigid Section Material: Использование 25/25 препарат for lamination in rigid areas, providing robust mechanical support.
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Поверхностная отделка: The entire board employs СОГЛАШАТЬСЯ (3μ”). This 3-microinch gold layer offers excellent flatness, стойкость к окислению, and solderability for PCB pads, making it ideal for assembling компоненты с мелким шагом like BGAs.
Design Key Considerations & Принцип работы
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) и 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. Использовать teardrop pads, curved traces, и stiffeners to prevent delamination and cracking.
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Контроль импеданса: For high-speed signals (например, differential pairs) crossing flex areas, precisely calculate trace width and dielectric thickness to maintain consistent характерный импеданс (например, 50Ом несимметричный, 100Ом дифференциал).
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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.
Характеристики производительности & Преимущества
Compared to traditional adhesive-based rigid-flex PCBs or rigid-board+connector assemblies, this UGPCB product offers distinct PCB advantages:
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Повышенная надежность: 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 динамические циклы изгиба.
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Превосходные электрические характеристики: Uniform PI dielectric with stable dielectric constant (Dk~3.4) ensures signal integrity for high-frequency applications and reduces loss.
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Легкий & Высокая плотность: Eliminates connectors, кабели, and solder joints, enabling 3D assembly. Can reduce system weight by up to 60% and save over 50% космос.
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Excellent Durability: Resists extreme temperatures (-55°С до +125°С) and chemical exposure, suitable for harsh environments.
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Simplified Assembly: A single integrated component reduces assembly steps, potential failure points, and improves final product yield.
Обзор производственного процесса
UGPCB rigid-flex PCB manufacturing combines advanced rigid PCB fabrication и flexible circuit production процессы:
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Inner Layer Fabrication: Separate etching of rigid FR-4 and flexible PI core layers.
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Ламинирование: Precise alignment and high-temperature/pressure bonding of rigid layers, adhesive-free flex cores, and prepreg into a monolithic structure—a critical step in многослойная печатная плата обработка.
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Бурение & Покрытие: Mechanical and laser drilling (if needed) followed by copper deposition and plating to create Plated Through Holes (ПТХ) for interlayer connection.
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Outer Layer Imaging & Офорт: Pattern formation for outer layer circuits.
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Применение поверхности: ENIG chemical deposition.
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Coverlay & Профилирование: Application of protective film (coverlay) on flex areas. Точный маршрутизация и лазерная резка define the board outline and flex section openings.
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Электрические испытания & Заключительная проверка: 100% Летающий зонд or fixture testing for electrical continuity, followed by rigorous visual and dimensional inspection.
Основные приложения & Варианты использования
Этот 6-layer high-reliability PCB is the ideal choice for demanding applications:
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Аэрокосмическая промышленность & Оборона: Satellite deployment mechanisms, системы наведения, avionics sensors requiring utmost reliability and weight reduction.
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Advanced Medical Devices: Эндоскопы, 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 & Бытовая электроника: Advanced camera modules, foldable display hinges, drone gimbals pursuing slimness and durability.
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Автомобильная электроника: 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.