China 365PCB specializes in the complex assembly of flexible and rigid-flex circuits, enabling innovative, lightweight, and highly reliable electronics for demanding applications.
Description Sentence: Unlock new product design possibilities with our end-to-end expertise in assembling circuits that flex, fold, and withstand dynamic motion, from prototyping to high-volume production.
Flex and rigid-flex PCBs represent a paradigm shift in electronic design, moving beyond the constraints of rigid boards. Our assembly service is tailored to the unique challenges and opportunities these substrates present, ensuring performance and reliability are never compromised.
Space and Weight Reduction: We help you achieve dramatic savings in size and weight by eliminating connectors and wires, allowing for tighter packaging and more compact product designs—critical for modern consumer, medical, and aerospace devices.
Enhanced Reliability and Durability: By removing failure-prone connection points (connectors, solder joints for cables), we create a monolithic circuit that is inherently more robust against vibration, shock, and repetitive folding, leading to a longer product lifespan.
Dynamic Flexing and 3D Packaging: Our assembly processes ensure that the flexible sections of your board can endure thousands to millions of bend cycles, enabling innovative form factors like folding smartphones, wearable devices, and moving robotic joints.
Streamlined Assembly Process: As your full-turnkey partner, we manage the entire process, from sourcing specialized flex materials to the delicate assembly and final testing, simplifying your supply chain and reducing time-to-market.
We possess the specialized equipment, materials, and process knowledge to handle the entire spectrum of flexible circuit assembly, from simple single-layer flex to highly complex multilayer rigid-flex designs.
Comprehensive Technology Offerings:
Single-Sided/Double-Sided Flex Assembly
Multilayer Flex Assembly (4+ layers)
Rigid-Flex PCB Assembly (combining rigid boards with flexible interconnects)
Stacked ZIF (Zero Insertion Force) Connector Assembly
Specialized Materials Expertise:
Substrates: Polyimide (Kapton), PET, PEN.
Adhesives: Acrylic, epoxy, and pressure-sensitive adhesives (PSA).
Coverlays & Stiffeners: Expertise in applying polyimide coverlays and integrating FR4, polyimide, or metal stiffeners for component support and rigidity.
Advanced Processes:
Precision SMT Placement on thin, flexible substrates using customized pallets and fixtures to prevent movement and ensure accuracy.
Selective Soldering and hand soldering for through-hole components on rigid sections.
Underfilling and corner bonding of components to enhance mechanical strength in flex areas.
Precision Flex Section Bending and Forming to ensure correct installation within the end-product enclosure.
The assembly of flex circuits requires a fundamentally different approach than rigid PCBs. Our process is engineered to proactively solve these unique challenges.
Managing Dimensional Stability: Flexible materials can shrink, stretch, or move during assembly. We use specialized fixtures and pallets to secure the circuit during solder paste printing, component placement, and reflow, ensuring perfect alignment.
Controlling Soldering Thermal Profiles: The thin, thermally conductive materials of flex circuits heat up very quickly. We create custom, carefully controlled thermal profiles for reflow ovens to prevent delamination, warping, or damage to sensitive components.
Preventing Mechanical Stress and Damage: We implement strict handling procedures to avoid kinking, scratching, or over-flexing the circuits during assembly. This includes proper support during all stages and careful manual handling by trained technicians.
Ensuring Adhesion and Protection: We expertly apply and cure coverlays, stiffeners, and protective coatings like flex-specific conformal coating or solder mask to insulate traces and protect the circuit from moisture, chemicals, and abrasion.
The unique nature of flex assemblies demands a specialized quality and testing protocol focused on mechanical integrity as much as electrical performance.
Visual Inspection and Dimensional Verification: 100% inspection for wrinkles, tears, delamination, and correct alignment of all layers and components. Critical bend areas are microscopically examined for signs of stress.
Continuity and HipOT Testing: Electrical testing to ensure there are no opens or shorts, especially after the mechanical stress of the assembly process. High-voltage (HiPot) testing checks insulation integrity.
X-Ray Inspection (AXI): Essential for inspecting solder joints under components and in the rigid sections of a rigid-flex board, checking for voids, bridges, and alignment.
Flex Endurance and Bend Testing: For dynamic applications, we can perform sample-based bend testing to validate that the assembly can withstand the required number of flex cycles without failure, in accordance with IPC standards.
Adhesion Testing: Testing the bond strength of coverlays, stiffeners, and laminated areas to ensure they will not separate during use.
Success in flex assembly begins at the design stage. Our engineering team provides critical feedback to optimize your design for reliability and manufacturability.
Bend Radius and Routing Recommendations: We advise on achieving the correct minimum bend radius to prevent copper cracking and ensure long-term reliability in dynamic flex areas.
Stiffener and Support Structure Design: We recommend where and how to use stiffeners to support components and connectors, preventing mechanical stress on solder joints.
Trace Routing and Component Placement Guidance: We provide rules to avoid placing vias and components in bend areas and suggest optimal trace routing to neutralize stress during flexing.
Layer Stack-up and Material Selection: We consult on the best material choices and layer stack-up configuration to meet your product's electrical, mechanical, and budgetary requirements.
Choosing a partner for flex assembly requires a vendor with proven experience, specialized infrastructure, and a commitment to quality.
Proven Experience with Complex Designs: We have a track record of successfully assembling sophisticated flex and rigid-flex designs for demanding industries like medical, aerospace, and consumer wearables.
Dedicated Flex Assembly Expertise: Our engineers and technicians are specifically trained in the nuances of handling and assembling flexible materials, ensuring your product is treated with the required care.
Full-Turnkey Solution: We manage everything from material procurement and PCB fabrication to final assembly and testing, providing a single point of accountability and simplifying your supply chain.
Commitment to IPC Standards: Our processes adhere to IPC-6013 (Qualification & Performance for Flexible PCBs) and IPC-2223 (Design Standard for Flexible PCBs), ensuring the highest level of quality and reliability.
Our capabilities enable innovation across a wide range of advanced industries.
Medical Devices: Endoscopes, hearing aids, patient monitors, and wearable health sensors.
Aerospace & Defense: Avionics systems, satellites, GPS devices, and military communication equipment.
Consumer Electronics: Smartphones, laptops, cameras, wearables, and drones.
Automotive Electronics: LED lighting systems, dashboard displays, sensors, and infotainment systems.
Industrial Equipment: Robotic arms, scanners, and portable test & measurement devices.