Rigid-Flex PCB Solutions Supplier

for Complex Interconnect Designs Global OEM;

Rigid-Flex PCB

Work closely with PCB layout designers, offering rigid-flex boards support from basic to HIGH-END technology.

Talk to a PCB Engineer

What is a Rigid-Flex PCB?

Rigid-flex qualification focuses on flex-to-rigid adhesion, bend-cycle endurance, and stable electrical continuity across transitions.

Qualification Materials & Compliance Overview
The Advantage of Rigid-Flex PCB

Qualification Materials & Compliance Overview

Acceptance & Reliability Standards

Manufactured in accordance with IPC-6013 rigid-flex PCB standards, with additional process controls for flex-to-rigid adhesion, via reliability, and bend-cycle endurance.

Material Standards

Rigid sections use High-Tg FR-4 or low-loss FR-4 laminates for component stability, built with polyimide (PI) circuits and rolled-annealed copper. Optional coverlay or flexible solder mask enhances flex protection.

Structural & Process Capabilities

Supports multilayer custom rigid-flex stack-up design, controlled impedance routing across rigid-to-flex transitions, blind and buried vias, and selective stiffeners for mechanical reinforcement.

Compliance

All complies with RoHS / REACH, UL safety requirements

IPC design guidelines, making the products suitable for medical, automotive, industrial, and aerospace electronics.

KnownPCB Prototyping & Mass Production Service Ask for Support at Engineering

The Advantage of Rigid-Flex PCB

By integrating rigid and flexible circuits into one structure, rigid-flex PCBs improve system stability while simplifying assembly.

01 Eliminates board-to-board connectors and flex cables, reducing potential failure points;
02 Enables compact 3D layouts and thinner electronic products;
03 Improves signal integrity by shortening interconnect paths and reducing impedance discontinuities.

Higher unit cost at board level, but often lower total system cost.

01 Complex lamination processes and polyimide materials increase PCB fabrication cost;
02 Fewer connectors and cables reduce assembly time and sourcing complexity;
03 Improved reliability lowers long-term maintenance and field failure risk.

Designed for mechanical reliability and electrical stability, not density alone.

01 Flex sections absorb vibration and mechanical stress instead of transferring it to solder joints;
02 Controlled impedance routing across rigid-flex transitions maintains signal quality;
03 Allows power, signal, and control circuits to coexist on one board with clear functional zoning.

KnownPCB Prototyping & Mass Production Service Ask for Support at Engineering

FLEX and Rigid-flex maker in Shenzhen provides PCB

with superior mechanical integrity and vibration resistance

IPC 6013 Type 3/4 Rigid-flex circuits eliminate failure points inherent in discrete wiring, providing superior mechanical integrity and vibration resistance. We master complex Z-axis interconnect designs and utilize high-grade polyimide (Kapton) films, ensuring reliable dynamic flexing cycles up to 100,000. interconnects.

Rigid-flex is rarely about flexibility alone. The following table focuses on stack-up structure, bend radius, material choices, and transition reliability—so you can evaluate whether your design benefits from rigid-flex integration, or if simpler flex or multilayer options would reduce risk and cost.

KnownPCB Profile Ask for DFM Guideline

01Rigid-Flex PCB Layer / Complexity Mapping Matrix

Parameter	BASIC	ADVANCED	HIGH-END	Complexity Trend	Classification Logic	Typical Use Case
Layer Count & Architecture	2–6L, simple rigid-flex	6–10L, multi-zone flex + rigid regions	10L+, multi-zone, multi-stage HDI + full rigid-flex architecture	↑ Layers & zone count	Layer Count / Structure	Engineer evaluates structural complexity
Number of Flex Zones	Single flex zone	2–3 flex zones	Multi-zone flex + overlapping segments	↑ Flex regions	Structure / Layout	Stack-up & routing planning
Transition Structure	Straight transition	Stepped transition	Complex 3D transition (bend + twist)	↑ 3D mechanical complexity	Structure	Mechanical/structural co-engineering
Min. Trace / Space	≈0.075 mm	≈0.075 mm	≈0.05 mm	↓ Feature size	Material / Process	Designer evaluates manufacturability
Min. Mechanical Drill Size	0.15 mm	0.15 mm	0.10 mm	↓ Drill size	Structure	Drill / via process selection
Flex Bending Radius	R≥W×T	R≥W×T	R≥W×T	↓ Bend radius	Functional / Flexibility	Validate bendability
Flex Life (Dynamic Cycles)	≤10k cycles	10k–50k cycles	≥50k–100k cycles	↑ Flex endurance	Functional / Reliability	One-time forming vs. dynamic flex applications
Rigid Core Material	High-Tg FR-4	High-Tg FR-4	High-Tg FR-4 / Megtron / Rogers	↑ Material performance	Material / Process	Signal & reliability requirements
Flex Core Material	Standard PI	High-performance PI / PET	Ultra-thin PI / LCP	↑ HF performance & flexibility	Material / Process	Flex zone reliability & RF capability
Flex Copper Type	RA/ED copper	RA/ED copper	High-ductility RA / ultra-thin copper	↑ Dynamic reliability	Material	Dynamic bend zones
Adhesive System	Adhesive-based flex	Mixed adhesive / adhesive-less	Full adhesive-less or specialty adhesive	↑ Thermal/impedance stability	Material	Reliability & SI control
Surface Finish	OSP / ENIG	ENIG / Immersion Silver	ENIG / ENEPIG / selective hard-gold	↑ Finish precision & durability	Material	Connector fingers / critical pads
Impedance Control	±10%	±7–10%	±5–7%	↑ Tolerance precision	Functional / SI	High-speed routing design
Flex-zone Impedance Consistency	Basic control	Critical-path controlled	Critical + redundant paths dual-direction control	↑ Flex SI difficulty	Functional / SI	Signal performance through bend zones
Operating Temperature Range	–20 to 85°C	–40 to 105°C	–40 to 125/150°C	↑ Temperature grade	Functional / Reliability	Automotive / industrial
Reliability Standard	IPC-6013 Class 2	IPC-6013 Class 2/3	IPC-6013 Class 3 / AEC-Q100	↑ Certification grade	Functional / Quality	High-reliability applications
Service Tier	Rigid-Flex BASIC	Rigid-Flex ADV	Rigid-Flex PRO	↑ Complexity & engineering effort	Tier / Capability	Procurement evaluates cost & complexity
Standard Lead Time	7–15 days	7–15 days	7–15 days	↑ Lead time	Schedule / Planning	Project planning
ZIF Contacts	Basic ZIF processing	Precision ZIF + chamfer	High-precision ZIF + selective thick-gold	↑ Termination precision	Material / Process	Connector insertion durability
Flex Reinforcement	Simple PI stiffener	PI/FR-4/steel stiffener options	Multi-material composite stiffener + custom shapes	↑ Reinforcement complexity	Structure / Process	Local support & stress control
3D Forming Capability	Flat bending	Simple 3D bending	Complex multi-axis 3D forming	↑ 3D forming requirements	Functional / Mechanical	Space-constrained products

Get a FREE DFM Review on Your Design (24-Hour Feedback)

Industry-specific

PCB Solutions

Learn about KnownPCB & Production equipments

October/13/2025High-I/O Industrial PCB | Industrial PCB Manufacturing

FAQs

Do these FAQs cover flex stackup design, bend-radius limits, impedance control, and reliability testing to ensure cost-effective rigid-flex PCB production with stable quality and on-time delivery?

Yes, the FAQs support to find out the answer about rigid-flex PCB manufacturing, reliability testing, and production consistency while balancing cost, lead time, and quality at scale.

Request Technical Consultation.

Rigid-Flex PCB Solutions Supplier

for Complex Interconnect Designs Global OEM;

What is a Rigid-Flex PCB?