Rigid-flex PCB assembly
Jul 8 – Oct 19, 2026Updated Oct 19, 2026
Reviewed by Dimitry Apollonsky
AI summary
ProtoExpress has a clear lead for rigid-flex PCB assembly.
Which brands AI mentions
In-house rigid-flex fabrication and assembly, with engineering support and quick-turn options.
Rigid-flex and flexible circuit support from quick-turn prototypes through volume production.
Turnkey design, fabrication, assembly, and testing for high-reliability applications.
Mentioned in
ChatGPTChatGPTGoogle AI ModeGoogle AI Mode
Widest split: TTM Technologies, 0% on ChatGPT and 76% on Google AI Mode.
- #1ProtoExpressChatGPT 41%Google AI Mode 81%
- #2tiedCirexx Flexible CircuitsChatGPT 45%Google AI Mode 38%
- #2tiedFlexPCBChatGPT 55%Google AI Mode 24%
- #2tiedCircuits UnlimitedChatGPT 73%Google AI Mode 0%
- #2tiedTTM TechnologiesChatGPT 0%Google AI Mode 76%
Questions and answers
Google AI ModeOct 10, 2026
Finding an assembly house capable of handling rigid-flex boards requires specialized capabilities, as rigid-flex assembly introduces distinct thermal, handling, and fixturing challenges compared to standard FR4 rigid boards.
Prominent industry leaders and specialized manufacturing houses with proven track records in rigid-flex fabrication and assembly include:
- TTM Technologies : A global powerhouse with strong US-based engineering and production footprint (e.g., California) as well as global scale. They specialize in high-reliability rigid-flex and HDI boards for aerospace, defense, and medical sectors.
- Sanmina Corporation : Well-known for complex, high-speed rigid-flex 3D designs, fine-line inner layers, and turnkey assembly for medical and enterprise infrastructure.
- All Flex Solutions : Specialized specifically in flexible and rigid-flex circuits, offering comprehensive prototyping and production-level assembly capabilities.
- Jabil : A massive global EMS provider with advanced process engineering for flexible hybrid electronics, specialized adhesive curing, and precision surface-mount technology (SMT) lines for rigid-flex.
To help narrow down the best fit, could you share:
- What is your required volume (prototype vs. mid/high-volume production)?
- Do you prefer a domestic (US/local) supplier or an offseas/international partner?
- What are the key industry certifications needed (e.g., ITAR, AS9100, ISO 13485)?
Sources cited in this answer1
ChatGPTOct 10, 2026
For rigid-flex PCB assembly, I’d prioritize companies that handle both rigid-flex fabrication and component assembly in-house. That gives you a single engineering team to manage flex handling, lamination-related design constraints, SMT soldering, inspection, and testing.
I found several U.S. manufacturers that explicitly advertise rigid-flex assembly capabilities, including options for prototypes, low-volume builds, and higher-reliability applications.
Best candidates to contact
1. Cirexx International
(Strong specialist match)
Location: Santa Clara, California
Specializes in flex and rigid-flex PCB fabrication and assembly under one roof. Offers turnkey, partial-turnkey, and consigned assembly, plus BGA, SMT, and through-hole capabilities. It also lists AS9100, ISO 9001, and ITAR-related capabilities.
Best for: Complex rigid-flex designs, engineering support, prototypes, and high-reliability applications.
Website: Rigid-flex assembly capabilities ·
2. Circuits Unlimited
Location: U.S. operations, with production options including Taiwan
Offers rigid-flex and flex circuit manufacturing, in-house assembly, component sourcing, and testing. Its stated scope covers prototype through higher-volume requirements.
Best for: A flexible supplier relationship that can extend from prototypes to production.
Website: Rigid-flex manufacturing and assembly ·
3. RUSH PCB Inc.
Milpitas, California
Provides rigid-flex fabrication, turnkey PCB assembly, prototyping, testing, and box-build services. It advertises ISO 9001 and ISO 13485, among other assembly standards.
Best for: Quick-turn engineering prototypes and projects needing fabrication plus assembly from one supplier.
Website: Rigid-flex PCB and assembly services ·
4. Blind Buried Circuits Inc.
U.S. supplier serving customers nationwide
Offers rigid-flex fabrication and assembly, including advanced multilayer designs, HDI features, and inspection. Advertises prototype and production services with multiple quality-system certifications.
Best for: Technically demanding multilayer rigid-flex boards and custom constructions.
Website: Rigid-flex PCB manufacturing and assembly ·
5. AlteraFlex Circuits
Location: Lathrop, California
Offers rigid-flex fabrication, SMT and through-hole assembly, component sourcing, AOI, X-ray inspection, and box-build services.
Best for: Turnkey builds where board fabrication, component procurement, and assembly need to be coordinated.
Website: Rigid-flex PCB manufacturing and assembly ·
My recommendation
I’d contact Cirexx first, followed by Circuits Unlimited and RUSH PCB. Cirexx is the clearest match for a company explicitly specializing in rigid-flex assembly rather than treating it as a secondary capability.
When requesting quotes, ask each supplier:
- Do you assemble rigid-flex boards in-house, and where is the assembly performed?
- Can you support your board's layer count, bend geometry, stiffeners, and component density?
- Do you offer turnkey component sourcing or accept customer-supplied parts?
- What inspection and testing are included: AOI, X-ray, electrical test, and functional test?
- Can you provide IPC-A-610 Class 2 or Class 3 workmanship, if required?
- What are the minimum order quantities and prototype lead times?
Let me narrow the list to your project
One question: What kind of rigid-flex assembly are you looking for?
1. Production volume
Prototype / low volume (1–100 boards)
Mid-volume production
High-volume production
2. Preferred manufacturing location
Florida or southeastern U.S. preferred
U.S. manufacturing only
Open to offshore manufacturing
3. Industry / quality requirements
Commercial / industrial
Medical
Aerospace / defense
Automotive
4. Assembly arrangement
Turnkey — supplier sources components and assembles
Consigned — I supply the components
Either
[Find the best matches]
Sources cited in this answer7
- cirexx.comPCB Assembly Services & Capabilities | Cirexx
- cirexx.comTurnkey PCB Assembly
- flexiblecircuitry.comCircuits Unlimited | USA Rigid-Flex & Flex PCB manufacturing
- rushpcb.comPCB Manufacturer, PCB Prototype & PCB Assembly | RUSH PCB USA
- blindburiedcircuits.comPCB Manufacturing & Assembly in USA | Blind Buried Circuits
- alteraflexusa.comAltera Flex Circuits USA — American PCB Manufacturing & Assembly
Google AI ModeOct 19, 2026
Several reputable manufacturers handle both the complex fabrication and assembly of rigid-flex circuit boards, ranging from high-reliability defense/aerospace suppliers to large-scale global EMS providers:- TTM Technologies – A top-tier global and US-based manufacturer with extensive capabilities in advanced rigid-flex, HDI, and RF boards. They offer end-to-end integration from custom fabrication to final assembly, heavily serving the aerospace, medical, and defense sectors.
- Cirexx International – Based in Silicon Valley, California, Cirexx specializes in high-reliability flex, rigid-flex, and RF/microwave circuits. They provide an all-in-house, "one-stop-shop" approach covering layout, fabrication, quick-turn prototyping, and assembly entirely in the USA.
- Sanmina Corporation – A major American Electronics Manufacturing Services (EMS) provider equipped for complex multilayer rigid-flex designs, high-density interconnects (HDI), and strict mil-spec/aerospace quality certifications.
- All Flex Solutions – A specialized U.S. manufacturer focused on flexible and rigid-flex circuits for mission-critical medical, defense, and industrial applications, known for deep technical support from design transfer through production.
- Jabil – A massive global EMS provider that handles high-density rigid-flex PCBA at scale, ideal if your project requires a seamless transition from prototype validation to high-volume manufacturing.
If you share details such as your project volume (prototype vs. production), industry requirements (e.g., medical, aerospace, commercial), and whether you prefer a domestic (US-based) or offshore supplier , I can narrow down the best fit.
Sources cited in this answer1
ChatGPTOct 19, 2026
For rigid-flex PCB assembly, I’d prioritize manufacturers that can handle both the rigid-flex circuit fabrication and component assembly under one roof. That can simplify design-for-manufacturing reviews, control of the flex-to-rigid transition, quality traceability, and production scheduling.
The best fit depends on whether you need a prototype run, low-volume engineering builds, or high-volume production, as well as whether you want a U.S.-based supplier or are open to overseas manufacturing.
My top 4 manufacturer recommendations
1. Sierra Circuits
(Best overall starting point)
A strong option for engineering prototypes and production runs. Its published capabilities specifically include rigid-flex assembly, SMT, BGA, through-hole assembly, and turnkey manufacturing in the U.S.
Best for: prototypes, design validation, and production builds.
2. Cirexx International
Particularly worth considering when you want fabrication and assembly integrated with engineering support. Cirexx advertises in-house turnkey assembly for rigid-flex, including component sourcing, SMT, through-hole, and complex low-quantity builds.
Best for: complex designs and a single U.S. manufacturing partner.
Website and assembly capabilities
3. Circuits Unlimited
Specializes in flexible and rigid-flex circuits, with assembly, component sourcing, and testing. It offers domestic prototyping and access to offshore production for scaling volume.
Best for: flex-specific expertise and prototype-to-volume scaling.
4. RUSH PCB
Offers rigid-flex fabrication, assembly, design support, and turnkey component sourcing. It is worth comparing if you need a one-stop supplier for quick-turn prototypes or small-to-medium production quantities.
Best for: fast-turn builds and consolidated PCB services.
What to verify before choosing
Ask each manufacturer to confirm:
- Rigid-flex assembly experience: Not just bare-board fabrication.
- Bend and assembly requirements: Dynamic flex versus a flex section bent once during installation.
- Quality and inspection: AOI, X-ray for BGAs where applicable, electrical testing, and workmanship standards such as IPC-A-610.
- Manufacturing location: Where the boards are fabricated and assembled, especially if domestic production or ITAR compliance is required.
- Production fit: Prototype minimums, lead times, component sourcing, and volume pricing.
Let me narrow it down
I can recommend the strongest match if you tell me one thing: What production stage are you at?
1. Production stage
Prototype / engineering samples
Low-volume production
High-volume production
2. Manufacturing preference
U.S. manufacturer preferred
Open to offshore manufacturing
ITAR / defense-capable supplier required
3. Approximate order quantity
1–20 boards
20–100 boards
100–1,000 boards
Over 1,000 boards
[Find my best-fit manufacturer]
Sources cited in this answer8
- protoexpress.comPCB Prototyping Services | Sierra Circuits
- protoexpress.comPCB Prototyping Services | Sierra Circuits
- cirexx.comTurnkey PCB Assembly
- cirexx.comTurnkey PCB Assembly
- flexiblecircuitry.comCircuits Unlimited | USA Rigid-Flex & Flex PCB manufacturing
- flexiblecircuitry.comCircuits Unlimited | USA Rigid-Flex & Flex PCB manufacturing
Also asked as
- Can you recommend a manufacturer capable of assembling rigid-flex printed circuit boards?
