Specialty Single-Layer

Double Access &
Back Bared Flex

Single conductor layer flexible circuits with access to conductor features from both sides — enabling unique interconnection schemes without double-sided PTH construction.

Double access flex, also known as back bared or reverse bared flex, are flexible circuits having a single conductor layer processed to allow access to selected conductor features from both sides of the circuit.

Standard single-sided flex allows connections from one face only. Double access circuits use specialized processing to remove the base film at selected locations on the back side, exposing the back face of copper conductors at those specific locations while maintaining single-layer construction.

While this construction offers unique benefits — conductor access from either face without full double-sided PTH construction — the specialized processing limits practical application to specific designs where this feature provides meaningful value.

Contact GCA Flex engineering to evaluate whether double access construction is appropriate for your specific interconnection requirements and volume.

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Double Access Flexible Circuits

Quick Specifications

Also Known AsBack bared / reverse bared
Conductor Layers1 (single layer)
Front AccessStandard
Back AccessSelective — specialty process
PTH RequiredNo
ConstructionSpecialty processing
CertificationsISO 9001:2008 / ITAR

Common Questions

Double Access Flexible Circuits FAQs

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What is double access flex?
Double access flex (back bared flex) is a single conductor layer circuit processed to allow access to conductor features from both faces — without requiring a second conductor layer or plated through holes.
When would I need double access flex?
When your design requires connections to the back side of specific conductor locations but does not justify full double-sided PTH construction. This is a specialized construction for specific design requirements.
Is this different from double-sided flex?
Yes. Double-sided flex has two separate conductor layers interconnected by PTH. Double access flex has a single conductor layer with selective removal of base film to expose conductor features from the back side at specific locations.
Can GCA Flex evaluate my design for double access construction?
Yes. Contact our engineering team at mario@gcaflex.com or 844-359-3539 to discuss your design requirements.

844-359-3539

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