Sourcing rigid-flex boards from China

Zero duty on rigid-flex printed circuits

Heading 8534 covers printed circuits. Rigid-flex describes a construction combining rigid sections with flexible interconnections; the tariff line depends on the circuit's elements and multilayer construction. The supplied tariff file contains only the three lines shown here.

Read from the UK Trade Tariff on 17 October 2026, all supplied lines carried 0% duty for goods from China. The file records no anti-dumping or countervailing duties, suspensions or attached import controls. Import VAT is separate from customs duty.

Confirm the commodity code against the fabrication drawing and the condition in which the boards are imported. Mounted-component assemblies need separate classification consideration. See the wider printed circuit board guide for the heading's broader scope.

Specify the rigid sections and flex zones

Supply controlled fabrication files and a drawing identifying rigid and flexible regions, layer stack-up, flexible dielectric, adhesive construction, copper thickness, coverlay openings, stiffeners and surface finish. Mark the rigid-to-flex transitions and connector contact areas. Agree which file revision governs production.

State whether the flex is folded during installation or moves repeatedly in service. Define the installed shape, bend radius, movement and acceptance test rather than leaving the factory to choose them. Approve samples in the intended enclosure and agree electrical testing of every board, with impedance results where the design needs them.

For component boards sold between businesses, the hazardous-substances rules apply to the in-scope finished assembly rather than the component sale itself. The finished-product manufacturer must establish component compliance before incorporation. Request material declarations covering the rigid laminate, flexible film, adhesives, coverlay and finish.

Worked duty example

Illustrative example, not a quote: Illustrative order of 5,000 multilayer bare rigid-flex boards under 8534 00 11 00, invoiced at £20,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £21,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £21,500, so it is £4,300. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Build: compare the batch with the approved stack-up and drawing; check rigid and flex thickness, outline, stiffener position and transition areas.

Flex zones: inspect coverlay registration, exposed copper, creases and delamination; check sample boards in the agreed installed shape using the specified bend test.

Electrical results: match every board to its electrical test record; review continuity, isolation, impedance results where specified and coupon microsections for plating defects.

Arrival condition: check moisture-barrier packaging, desiccant, humidity indicators and batch identification; examine contact finishes and retain samples before assembly.

What goes wrong

A board can pass a flat electrical test and fail after folding. Creases, damaged copper or a poorly controlled rigid-to-flex transition can produce intermittent connections. Incorrect coverlay openings or stiffener positions can also prevent connector insertion or fitting inside the enclosure.

Unapproved substitutions in film, adhesive or copper construction can change bending behaviour and assembly performance. Put material changes under written approval, compare production samples with the approved build, and investigate failures with electrical records and microsections before accepting the batch.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.