Hybrid Construction

Rigid-Flex
Circuits

Rigid and flexible substrates laminated into a single structure — eliminating connectors, enabling 3D packaging, and delivering superior reliability for aerospace and defense.

Rigid-flex circuits are a hybrid construction combining rigid PCB substrate zones and flexible circuit zones laminated together as a single integrated assembly. This is not a rigidized flex — where a stiffener supports component weight. In true rigid-flex, all layers are electrically integrated.

The rigid zones provide stable platforms for component attachment. The flexible zones connect the rigid zones, replacing the connectors and wire harnesses that would otherwise be needed between separate rigid boards.

Eliminating connectors is the primary reliability advantage. Every connector is a potential failure point. In aerospace, military, and medical applications where connectors cannot be accessed for repair, eliminating them significantly improves system MTBF.

GCA Flex has manufactured rigid-flex circuits for defense and aerospace customers for over 30 years. The technology that once served only military designers is now common in commercial laptops, medical equipment, and smartphones.

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Rigid-Flex Circuits

Quick Specifications

ConstructionRigid + Flexible (integrated)
Rigid SubstrateFR-4
Flex SubstrateKAPTON® Polyimide
Interlayer BondPre-preg
InterconnectPTH, via fill, blind via
Key BenefitEliminates board-to-board connectors
ApplicationsMilitary, Aerospace, Medical
CertificationsISO 9001:2008 / ITAR

Common Questions

Rigid-Flex Circuits FAQs

What is the difference between rigid-flex and rigidized flex?
Rigid-flex has rigid and flexible substrates laminated as one integrated assembly with electrically active rigid layers. Rigidized flex simply has a stiffener bonded to support component weight — no electrically active rigid layers.
Why choose rigid-flex over separate boards with connectors?
Every connector eliminated removes a failure mode, reduces assembly labor, saves space, and reduces weight. Rigid-flex integrates everything into one assembly for maximum reliability.
What certifications does GCA Flex hold for rigid-flex?
ISO 9001:2008 certified and ITAR registered. GCA Flex has manufactured defense-grade rigid-flex circuits continuously for over 30 years.
What industries use rigid-flex circuits?
Military and aerospace are the primary markets. Commercial applications include laptops, smartphones, cameras, medical diagnostic equipment, and any application where 3D integration eliminates connectors.

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