# Rigid Flex PCB

> Design insight. Connected engineering.


## Posts

- [Antenna clearance in folded electronic assemblies](https://rigidflexiblepcb.com/antenna-clearance-in-folded-electronic-assemblies/): Antenna clearance in a folded assembly must be reviewed in three dimensions.
- [Vibration constraints in an industrial controller](https://rigidflexiblepcb.com/vibration-constraints-in-an-industrial-controller/): Vibration review for an industrial controller should include the enclosure, mounting features, rigid islands, and flexible connections as one mechanical…
- [Mechanical constraints in a compact patient monitor](https://rigidflexiblepcb.com/mechanical-constraints-in-a-compact-patient-monitor/): A compact patient-monitor concept needs a mechanical interface map before its rigid-flex outline is fixed.
- [Comparing bare-board and assembled-system cost](https://rigidflexiblepcb.com/comparing-bare-board-and-assembled-system-cost/): Compare a rigid-flex architecture at the level of the deliverable you need.
- [AOI: defect coverage and limitations](https://rigidflexiblepcb.com/aoi-defect-coverage-and-limitations/): Automated optical inspection, or AOI, provides evidence about features observable by the configured optical inspection process.
- [Microinches to micrometres: gold thickness conversion](https://rigidflexiblepcb.com/microinches-to-micrometres-gold-thickness-conversion/): To convert a gold thickness from microinches to micrometres, multiply by 0.0254.
- [Drill data review for plated and non-plated features](https://rigidflexiblepcb.com/drill-data-review-for-plated-and-non-plated-features/): Drill data should identify the geometry of each hole and the manufacturing meaning of the feature.
- [What an impedance coupon can and cannot establish](https://rigidflexiblepcb.com/what-an-impedance-coupon-can-and-cannot-establish/): An impedance coupon is a defined test structure used to obtain evidence about a manufactured transmission-line construction.
- [Total layers versus flex layers: why both matter](https://rigidflexiblepcb.com/total-layers-versus-flex-layers-why-both-matter/): Specify both the total copper-layer construction and the copper layers present in each flexible region when describing a rigid-flex PCB.
- [Static bending versus dynamic flexing: writing the requirement](https://rigidflexiblepcb.com/static-bending-versus-dynamic-flexing-writing-the-requirement/): A useful flex requirement describes the motion the circuit will experience.
- [Rigid-flex packaging for a compact communications module](https://rigidflexiblepcb.com/rigid-flex-packaging-for-a-compact-communications-module/): Packaging a communications module with rigid-flex requires a coordinated mechanical and RF review.
- [Rigid-flex planning for an automotive sensor module](https://rigidflexiblepcb.com/rigid-flex-planning-for-an-automotive-sensor-module/): A rigid-flex board inside an automotive sensor module should be planned around the sensor datum, housing attachment points, connector interface, and…
- [Rigid-flex architecture for a wearable sensor](https://rigidflexiblepcb.com/rigid-flex-architecture-for-a-wearable-sensor/): A wearable sensor architecture should begin with the locations of the sensing surface, battery, radio, and mechanical supports.
- [Rigid-flex cost drivers: a procurement worksheet](https://rigidflexiblepcb.com/rigid-flex-cost-drivers-a-procurement-worksheet/): A useful rigid-flex cost comparison starts with matched requirements and quantities. Separate one-time charges from recurring unit prices, identify what ea
- [Bare-board electrical testing versus functional testing](https://rigidflexiblepcb.com/bare-board-electrical-testing-versus-functional-testing/): Bare-board electrical testing and functional testing answer different questions. A bare-board test examines specified electrical properties before componen
- [ENIG versus hard gold: start with the pad function](https://rigidflexiblepcb.com/enig-versus-hard-gold-start-with-the-pad-function/): Choose a PCB gold finish by the job the surface must perform. A solderable component pad, a repeatedly mated contact, and a bonding surface should not be t
- [From fabrication data to a rigid-flex process plan](https://rigidflexiblepcb.com/from-fabrication-data-to-a-rigid-flex-process-plan/): A useful rigid-flex manufacturing handoff connects each released file to a defined part revision and explains which information governs the construction. T
- [Impedance targets across rigid and flexible regions](https://rigidflexiblepcb.com/impedance-targets-across-rigid-and-flexible-regions/): A shared impedance target does not automatically imply one trace geometry throughout a rigid-flex PCB. Review each region using its actual construction and
- [Reading a region-specific rigid-flex stackup](https://rigidflexiblepcb.com/reading-a-region-specific-rigid-flex-stackup/): A rigid-flex stackup must be read by region. A layer present in a rigid island may be absent from an exposed flex span, so a single overall layer count is
- [How to define rigid and flex regions in a fabrication drawing](https://rigidflexiblepcb.com/how-to-define-rigid-and-flex-regions-in-a-fabrication-drawing/): A rigid-flex PCB fabrication drawing should let a reviewer identify each region, locate its boundaries, and connect it to the correct stackup without guessing.

## Pages

- [Rigid Flex PCB](https://rigidflexiblepcb.com/)
- [Website Sitemap](https://rigidflexiblepcb.com/sitemap/)
- [Inquiry Privacy](https://rigidflexiblepcb.com/privacy/): The inquiry form requests your name, email address and project message. You may also provide company details, specifications and files relevant to your request.
- [PCB Engineering Knowledge Center](https://rigidflexiblepcb.com/insights/): The 300-day editorial program is prepared. Reviewed articles will appear here after launch; no articles have been published yet.
- [Request a Rigid Flex PCB Project Review](https://rigidflexiblepcb.com/quote/)
- [Rigid Flex PCB Engineering Tools](https://rigidflexiblepcb.com/tools/): Convert specification units. This tool does not recommend a plating thickness.
- [Rigid Flex PCB for Computing & Storage](https://rigidflexiblepcb.com/applications/computing/): Small computing and storage modules can create competing demands for routing density, signal integrity and enclosure space.
- [Rigid Flex PCB for Consumer Electronics](https://rigidflexiblepcb.com/applications/consumer/): Cameras, handheld devices, wearables and small connected products can use rigid-flex to arrange electronics around batteries, displays and mechanical features.
- [Rigid Flex PCB for Telecom & Networking](https://rigidflexiblepcb.com/applications/telecom/): Compact communication modules can require several rigid circuit areas arranged around an enclosure.
- [Rigid Flex PCB for Industrial Systems](https://rigidflexiblepcb.com/applications/industrial/): Robotics, instrumentation, machine vision and compact controllers may use flexible connections to bridge constrained mechanical spaces.
- [Rigid Flex PCB for Automotive](https://rigidflexiblepcb.com/applications/automotive/): Sensor modules, compact control assemblies and battery-monitoring concepts can present tight packaging constraints.
- [Rigid Flex PCB for Aerospace](https://rigidflexiblepcb.com/applications/aerospace/): Rigid-flex can be considered where packaging volume and interconnect mass are important.
- [Rigid Flex PCB for Medical Devices](https://rigidflexiblepcb.com/applications/medical/): Portable monitors, diagnostic instruments and body-worn sensors can benefit from three-dimensional interconnect packaging.
- [Applications](https://rigidflexiblepcb.com/applications/): Explore PCB application guides using the Applications menu.
- [Rigid Flex PCB Frequently Asked Questions](https://rigidflexiblepcb.com/faq/): On this pageWhat is a rigid-flex PCB?Is rigid-flex always cheaper?What determines a safe bend radius?Can a gold thickness converter select my finish?What files are needed for a quote?Are comments enabled?
- [About Rigid Flex PCB](https://rigidflexiblepcb.com/about/): Rigid Flex PCB brings construction guides, design considerations and project submission into one place.
- [PCB Quality & Delivery Planning](https://rigidflexiblepcb.com/quality-delivery/): Identify the applicable specifications and revisions, required inspection records, electrical test scope and any customer-specific requirements.
- [PCB Inspection & Testing](https://rigidflexiblepcb.com/testing/): Optical inspection examines visible circuit features. Bare-board electrical testing checks connectivity and isolation against a reference.
- [PCB Manufacturing Capability Review](https://rigidflexiblepcb.com/capabilities/): Layer count, copper thickness, trace geometry, holes and material selection interact.
- [Rigid Flex PCB Manufacturing Process](https://rigidflexiblepcb.com/manufacturing/): The fabrication data is reviewed against the proposed construction, materials, tolerances and acceptance requirements.
- [PCB Surface Finishes & Gold Thickness](https://rigidflexiblepcb.com/surface-finishes/): Solder pads, contact fingers and wire-bonding surfaces have different needs. ENIG, ENEPIG, OSP and electrolytic gold constructions are not interchangeable.
- [Rigid Flex PCB Stackup & Materials](https://rigidflexiblepcb.com/stackup-materials/): A rigid-flex drawing should distinguish rigid-only layers, continuous flex layers, coverlay, bonding layers and any air gaps.
- [Rigid Flex PCB Design Guide](https://rigidflexiblepcb.com/design-guide/): Map rigid board positions, the flexible spans between them, assembly sequence and the final folded condition.
- [Metal Core PCB: Thermal Path & Design Review](https://rigidflexiblepcb.com/metal-core-pcb/): A metal substrate can help spread heat, but the dielectric between copper and metal remains an important part of the thermal path.
- [Rigid PCB: Stackup, Fabrication Data & Assembly Planning](https://rigidflexiblepcb.com/rigid-pcb/): Rigid PCBs provide mechanical support and electrical interconnection using copper layers separated by dielectric materials.
- [Flexible PCB: Materials, Stiffeners & Bend Requirements](https://rigidflexiblepcb.com/flexible-pcb/): Single-sided, double-sided and multilayer flexible circuits solve different routing problems.
- [Rigid Flex PCB: Construction, Design & Project Review](https://rigidflexiblepcb.com/rigid-flex-pcb/): A rigid-flex PCB combines rigid board sections and flexible dielectric regions in an integrated interconnect.


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