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The Foldable Screen Hinge Area Adapter Rigid-flex PCB is a critical interconnection carrier enabling high integration, high reliability, and foldability in modern smartphone display modules. By utilizing a composite structure where rigid areas secure components and the flexible area undergoes dynamic bending, it ensures circuit stability, signal integrity, and mechanical durability within limited space. It is a core technological enabler for thinner and lighter devices.
3D Routing: The flexible portion can be folded or bent like paper, fully utilizing the vertical space inside the phone to fold components such as the driver IC to the back of the screen, thereby enabling ultra-narrow bezels or even bezel-less full-screen designs. This facilitates ultra-thin smartphone design.
The rigid-flex board used in display modules is a key component connecting the display driver IC to the mainboard. It combines the bendability of flexible circuits with the stability of rigid boards, forming the foundation for achieving high screen-to-body ratios and thin, lightweight designs.
1. Thickness Reduction: Eliminates the thickness of connectors and redundant cover layers of rigid boards, resulting in a thinner overall structure compared to discrete solutions.
2. Superior Signal Integrity: Employs high-density wiring techniques (e.g., differential pair routing) and low dielectric loss materials to stably transmit high-speed image data streams (supporting 4K/8K video), effectively suppressing signal attenuation and electromagnetic interference, ensuring lossless, low-latency transmission of high-pixel image data.
3. Interference Immunity: Compared to long flexible cables, rigid-flex boards shorten signal paths and can effectively isolate electromagnetic interference through copper pouring or shielding films.
4. Structural Integrity: The interconnections between rigid and flexible sections are formed through internal chemical deposition and plating, rather than solder joints. This makes the bending resistance at the junction far superior to traditional "FPC + connector" or "FPC soldered to rigid board" solutions.
5. High Shock Resistance: The integrated structure minimizes the risk of solder joint failure, ensuring stable signal transmission even during drops or vibration.
6. Supports Dynamic Bending: In foldable phones, it can withstand over 400,000 repeated bends while maintaining electrical performance.
1. Structural Parameters:
Layer Count & Structure: Typically 4-6 layers, using "rigid-flex" construction.
Thickness: Flexible area typically 0.1-0.2mm for extreme thinness; rigid area thickness designed according to component mounting and routing requirements.
Minimum Bending Radius: Can be less than 0.5mm, suitable for tight bending spaces.
2. Electrical Performance:
Line Width/Space:Up to 40μm - 50μm, meeting high-density signal transmission requirements.
Impedance Control: Strict impedance control (e.g., 100Ω ±10%) for high-speed differential signals (e.g., MIPI DSI).
Transmission Bandwidth: Supports high-speed data transmission of several Gbps per channel, meeting high-resolution, high-frame-rate display requirements.
3. Materials & Reliability:
Substrate: Flexible section can use Polyimide (PI) or higher-performance Liquid Crystal Polymer (LCP), with the latter offering advantages in ultra-thinness, low loss, and bending endurance.
Bending Endurance: Dynamic bending life requirement >400,000 cycles.
Operating Temperature: -30°C to +85°C, meeting the stringent usage environment requirements of consumer electronics.。
Foldable Screen Hinge Area Adapter Rigid-flex PCB is the core interconnection and support solution for modern smartphone display systems, primarily serving high-end foldable phone screens. Its excellent resistance to repeated bending makes it an ideal choice for connecting foldable displays that traverse the hinge area.
We specialize in providing industry-leading rigid-flex board solutions for display interconnection in the mobile phone sector. We offer not only standardized high-reliability products but also possess strong capabilities in collaborative design, simulation optimization, and custom development. Backed by deep expertise in precision circuit processing, materials science, thermal simulation, and signal integrity analysis, we collaborate closely with customers to provide full-process support—from concept design to mass production—tailored to specific ID designs, stacking architectures, and display performance targets. We are committed to leveraging innovative engineering to help customers push the boundaries of space and performance in smartphone display systems, creating clearer and more stable visual experiences, making you your trusted core component partner.
For more product details or to discuss cooperation opportunities, please contact:
Ding Rui (Terry Ding), VP
Tel: +86-18750290300
Email: rding@hon-flex.com
Wang Yuhe (Rick Wang), Business Manager
Tel: +86-15959382432
Email: yhwang@hon-flex.com
Website: https://www.hongflex.com
Address
No. 19, Xianghai Road, Xiang'an Industrial Zone, Torch High-tech Zone, Xiamen City, China
