吃瓜tv / Rigid-flex engineering
Custom Rigid-Flex PCB: Enclosure & Interface Planning
Turn enclosure constraints and electrical interfaces into a buildable custom-board enquiry.
From enclosure constraints to a flat fabrication drawing
Illustrative design brief: two rigid circuit regions mount on adjacent enclosure walls. A flexible bridge makes one 90掳 installation bend. This example is not a customer project or an approved construction.
- Choose mechanical datums on the two mounting regions. Dimension connector and fastener locations from those datums, not from an uncertain fold line.
- Draw the installed configuration with component heights, clearance to the housing and access for insertion or screws.
- Separate the free bend arc from the straight tangency lengths. A nominal 3 mm neutral-path radius through 90掳 has an arc length of 蟺 脳 3 / 2 = 4.71 mm; the complete bridge also needs its straight sections and tolerances.
- Map which copper layers continue through the bridge. Freeze that map before completing the inter-region routing.
- Check the assembly sequence with a mechanical mockup or the project CAD data. Release the flat profile and installed drawing under the same revision.
The 3 mm radius is a geometric assumption, not a minimum bend rule. The material construction, thickness, copper and duty determine whether it is acceptable. If the two regions must be disconnected for service, compare the concept with a separate flex interconnect before committing to integrated rigid-flex.
Construction reference
Gallery references illustrate board forms. They do not certify the construction, dimensional limits or operating life of your design.
Region and bend workbench
Use consistent layer numbering and actual finished thicknesses. The calculator checks one contiguous flex span; it does not infer bonding materials or approve a manufacturing process.
Rigid-Flex Region & Bend Workbench
Rigid-flex PCB budget scenario
Explore an early bare-board allowance. The coefficients are uncalibrated; unsupported combinations require an engineering quote.
Rigid-Flex PCB Budget Estimator
Continue with the next engineering decision
Send a complete project brief
Include the flat outline and installed view, layer/region mapping, material grades, finished thicknesses, bend duty, copper artwork, drill information and quantities. Add the BOM, placement file and acceptance requirements when assembly is included. For the wider fabrication scope, see PCB manufacturing.
Mark unresolved choices rather than guessing. Download tool results if they help describe your request. Contact does not automatically receive calculator inputs.