Custom Rigid-Flex PCBs for Integrated Electronic Systems

Custom Rigid-Flex PCBs for Integrated Electronic Systems

Connect rigid board sections with flexible circuits in one compact assembly. XinshunPCB helps align stackups, bend zones, materials, and assembly requirements for your rigid-flex design, from prototype evaluation to production.

Rigid and Flexible Circuits in One Integrated Design

Plan board connections around your enclosure, component layout, and installation requirements.

Custom Rigid-Flex Printed Circuit Boards

Custom Rigid-Flex Printed Circuit Boards

Rigid-flex PCBs combine component-supporting rigid sections with flexible interconnects, helping simplify connections within compact electronic products. XinshunPCB reviews your layer stackup, board outlines, rigid-to-flex transitions, and intended bend conditions together so the construction fits your mechanical and assembly requirements.

  • Rigid board sections and flexible interconnects in one construction
  • Stackup and bend-zone review for your mechanical requirements
  • Prototype evaluation and production planning for your design
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Explore Our Rigid-Flex PCB Products

Browse selected rigid-flex builds and review their materials, construction, and application details. Use these examples to discuss an integrated board design for your product with XinshunPCB.

Rigid-Flex PCB Specifications

Review construction parameters for rigid-flex builds together with the process and reliability window for rigid sections. Mass-production and extended-prototype limits are shown separately. Contact XinshunPCB to evaluate requirements beyond these ranges.

Rigid-flex construction

ParameterSpecification
Rigid-flex total layers2–32 layers
Flexible layers (within)1–12 layers
Rigid base materialFR-4 (High-Tg 150 / 170 available)
Flex base materialPolyimide (PI / Kapton), PET, PEN
CoverlayPolyimide coverlay on flex areas
StiffenersFR4, aluminum, polyimide, stainless steel
Finished thickness (rigid-flex)0.06–4.0 mm (0.0024″–0.16″)
Copper weightFlex 1/3 oz–2 oz · rigid heavy copper to 12 oz
Flex-section min trace / space0.5 oz: 4/4 mil · 1 oz: 5/5 mil · 2 oz: 5/7 mil

Lines, spacing & holes — rigid sections

ParameterMass productionPrototype (extended)
Min. inner-layer clearance3 mil3 mil
Min. line width3 mil (0.075 mm)3 mil (0.075 mm)
Min. line space3 mil (0.075 mm)3 mil (0.075 mm)
Min. hole size0.1 mm0.1 mm
Min. plated hole copper25 µm25 µm
Min. blind / buried via0.1 mm0.1 mm (1–18 layers)
PTH diameter tolerance±0.076 mm (±3 mil)±0.076 mm (±3 mil)
NPTH diameter tolerance±0.05 mm (±2 mil)±0.05 mm (±2 mil)
Hole position deviation±0.05 mm (±2 mil)±0.05 mm (±2 mil)

Advanced & High-End Rigid-Flex Processes

Constructions for tight folds, high layer counts, and demanding reliability requirements.

Multilayer Rigid-Flex

Multilayer Rigid-Flex

Multiple rigid sub-stacks linked by one or more flex layers, integrating a complete system into a single folding board.

2–32 layers
Book-Binding & Air-Gap

Book-Binding & Air-Gap

Loose-leaf, book-binding, and unbonded air-gap flex layers support a smaller bend radius and longer flex life.

Tight folds
HDI in Rigid Sections

HDI in Rigid Sections

Laser microvias, stacked or staggered vias, and fine lines in the rigid areas support dense component fan-out.

Microvia
Controlled Impedance

Controlled Impedance

Impedance control is maintained across rigid-to-flex transitions with stackup design and TDR verification.

To ±7%
EMI Shielding Film

EMI Shielding Film

Conductive shielding film over flex areas supports noise-sensitive, high-frequency, and medical designs.

Shielded flex
Stiffeners & ZIF

Stiffeners & ZIF

Selective stiffeners and bevelled gold ZIF or contact fingers reinforce connector and component areas.

FR4 · PI · steel

PCB Capability Families: Core Manufacturing Solutions

Rigid, flex, rigid-flex, HDI, metal-core, and SMT production lines cover a broad range of PCB and PCBA needs.

Consumer Electronics

Consumer Electronics

Custom PCB fabrication and assembly for wearables, smart-home devices, wireless audio and portable electronics. XinshunPCB supports design review, component sourcing and project-specific inspection from prototype to production.

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Industrial & Power Electronics

Industrial & Power Electronics

High-power BMS, energy storage, and industrial control solutions engineered with heavy copper, high-voltage creepage control, and high-TG materials.

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Telecommunications & IoT

Telecommunications & IoT

High-frequency PCB and PCBA solutions for RF, 5G, networking, and connected devices.

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Medical Equipment

Medical Equipment

Medical-grade PCB and PCBA solutions built for traceability, reliability, and strict quality control.

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Automotive Electronic

Automotive Electronic

Automotive PCB and PCBA solutions designed for vibration, thermal cycling, and long-life reliability.

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Frequently Asked Questions About Rigid-Flex PCBs

Find answers about choosing rigid-flex construction, preparing design files, specifying bend conditions, and planning prototype and production orders.

Request a prototype quantity together with your expected production demand. Use the initial build to check enclosure fit, folding and installation, assembly handling, and electrical operation under the intended conditions. Agree any additional inspection or reliability testing in advance. Record the results and release an approved design revision before placing the next order; materials, tooling, quantities, and lead time are confirmed for each build.

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Have a new project or custom PCB requirements? Simply fill in your project details below. XINSHUNPCB's FAE engineering team will analyze your specifications and deliver a detailed formal quotation along with free engineering advice within 2-24 hours.

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Experienced FAE support to help optimize your specifications.

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