6 Layer Rigid-Flex PCB Manufacturing | High-Reliability Adhesive-Free Design – UGPCB

UGPCB 6-Layer Adhesive-Free Rigid-Flex PCB Présentation du produit & Définition

A 6-Layer Rigid-Flex PCB is an advanced circuit imprimé technology that integrally combines rigid board stability with flexible circuit dynamic bending capability. This product from UGPCB utilizes a premium adhesive-free lamination processus, resulting in a final board thickness of 1.50mm, dimensions of 120x80mm, and features an ACCEPTER (Or par immersion au nickel autocatalytique, 3m”) finition de surface. It represents a cutting-edge solution for Interconnexion à haute densité (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:

• By Construction: Rigid-Flex Printed Board (Taper 4)

• Par nombre de couches: Six-Layer Board (combining rigid and flexible layers)

• By Technology: Adhesive-less (Adhesive-Free) Flexible Material Rigid-Flex PCB

• Par candidature: High-Reliability, High-Flex-Cycle Industrial & Medical Grade PCB

Core Structure & Matériels

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

• Core Flex Material: Caractéristiques Shengyi’s 18/50/18 μm adhesive-free double-sided substrate. “18/50/18” denotes a structure of 1 once (18µm) cuivre / 50μm Polyimide (PI) dielectric / 1 once (18µm) cuivre. Le adhesive-free construction bonds copper to PI chemically, eliminating adhesive layers, which significantly enhances thermal resistance, chemical resistance, et flex circuit fiabilité.

• Rigid Section Material: Utilisations 25/25 préampe for lamination in rigid areas, providing robust mechanical support.

• Finition de surface: The entire board employs ACCEPTER (3m”). 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 & Principe de fonctionnement

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) et 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. Utiliser teardrop pads, curved traces, et stiffeners to prevent delamination and cracking.

3. Contrôle de l'impédance: For high-speed signals (par ex., differential pairs) crossing flex areas, precisely calculate trace width and dielectric thickness to maintain consistent impédance caractéristique (par ex., 50Ω asymétrique, 100différentiel Ω).

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

Caractéristiques de performance & Avantages

Compared to traditional adhesive-based rigid-flex PCBs or rigid-board+connector assemblies, this UGPCB product offers distinct PCB advantages:

• Fiabilité accrue: 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.

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

• Léger & À haute densité: Eliminates connectors, câbles, and solder joints, enabling 3D assembly. Can reduce system weight by up to 60% and save over 50% espace.

• Excellent Durability: Resists extreme temperatures (-55°C à +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.

Aperçu du processus de production

UGPCB rigid-flex PCB manufacturing combines advanced rigid PCB fabrication et flexible circuit production processus:

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

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

3. Forage & Placage: Mechanical and laser drilling (if needed) followed by copper deposition and plating to create Trous traversants plaqués (PTH) for interlayer connection.

4. Imagerie de la couche externe & Gravure: Pattern formation for outer layer circuits.

5. Application de finition de surface: ENIG chemical deposition.

6. Coverlay & Profiling: Application of protective film (coverlay) on flex areas. Précis routage et laser cutting define the board outline and flex section openings.

7. Test électrique & Inspection finale: 100% sonde volante or fixture testing for electrical continuity, followed by rigorous visual and dimensional inspection.

Applications principales & Cas d'utilisation

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

• Aérospatial & Défense: Satellite deployment mechanisms, guidance systems, avionics sensors requiring utmost reliability and weight reduction.

• Advanced Medical Devices: Endoscopes, 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 & Electronique grand public: Advanced camera modules, foldable display hinges, drone gimbals pursuing slimness and durability.

• Électronique automobile: 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.