Trusted by Industry Leaders


  • Lockheed Martin
  • Northrop Gruman


  • KLA Tencor
  • Brooks Automation


  • Visx
  • Medtronic


  • JDSU
  • HP

Contract Mfg

  • Foxconn
  • Sanmina SCI

Complete Flex Circuit Design for Manufacturability - consulting using Valor Genesis ODB+++ DFM software.

Learn about our Design process >

Our modern 50,000 square foot manufacturing facility allows us to provide all flex & rigid-flex services under one roof and offer quick-turn capabilities.

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Complete in-house Flex Circuit and Rigid-Flex Circuit Turnkey and Consignment Assembly.

Assembly at its best >

Why Lenthor Engineering?

  • Trusted leader in Flex Circuit and Rigid-Flex Printed Circuit Boards
  • Design, Fabrication and Assembly under one roof, a modern 50,000 sq ft manufacturing facility
  • Specialized in Multilayer and Rigid-flex technology with high aspect ratios & layer counts
  • Complete in-house Flex Circuit and Rigid-Flex Circuit Turnkey and Consignment Assembly
  • Complete Design for Manufacturability consulting using Valor Genesis ODB+++ DFM software
  • Time Critical (Quick-Turn) capability
  • Made in the U.S.A.


  • Single sided through 30 layers of flex
  • Multi-layer Rigid Flex
  • Staggered Layer Flex
  • Dual Side Access
  • Blind and Buried Vias
  • Impedance Control
  • Book Binder

Compliance & Certifications

  • ITAR Registered and Certified
  • ISO 9001:2015 Certification
  • RoHS Compliant Boards Availible
  • IPC-6013 Class 3 Qualified
  • UL Certification: Multilayer / Rigid-Flex
  • Lockheed Martin AVL Approval
  • JPL Approved Supplier

Making Things Flexible in Rigid World

If your project has you thinking flex circuits then Lenthor Engineering is the right place for you.

Whether your need is a basic single-sided flexible circuit or a complex multi-layer rigid flex solution, Lenthor Engineering can provide the assistance you need to get your idea to market. From flex and rigid flex circuit design layout, board fabrication or a fully assembled flex or rigid-flex circuit solution, Lenthor's +30 years of hands-on experience will be with you every step of the way.

Benefits of Flex Circuit Technology

Flexible circuits provide four major benefits over rigid PC boards.

Freedom of Design - Flexible circuits allow for an almost unlimited degree of design freedom.

Flex circuits can fit in tight spaces. They can bend, fold, twist, change in width many times and even flex from a rolled configuration. This gives the package designer the freedom to relocate other parts and subassemblies where they will optimize circuit and equipment operation. The designer is no longer restricted by the space demands of bulky, rigid PCBs.

Saving on Space and Weight - Because flexible circuits can be bent, twisted and rolled to suit the contour of the equipment, designers can enjoy a space savings of up to 75%.

The larger surface-to-volume ratio of flexible circuits allow for increased heat dissipation and lighter current capacity. Denser device populations and lighter conductors can be designed into a product, freeing space for additional product features.

Reliability and Durability - Flex circuits are made from precise replicas of artwork for superior manufacturing repeatability. The etched circuits replace the solder and hand-wiring connections of the rigid board, completely eliminating wiring errors.

Production Cost Savings - Production of designs using flexible circuits require less manual labor and reduces the probability of production errors. The use of flex circuits eliminates the high cost of routing, wrapping, and soldering wires.

Complete interconnection systems are installed or replaced, rather than individual rigid printed circuit boards. This greatly eliminates wiring errors and reduces manufacturing costs. This automation also reduces the chance of human error and increases reliability in the design.

Low volume applications benefit the most when circuit designs are very complex. Most high volume applications get lower production costs regardless of the complexity of the circuit. As simpler, more direct methods of integrating circuits are discovered, the cost savings realized by flex increases. The use of conductive ink, anisotropic adhesives, and additive circuitry are ideal in designs using flex.

If you want to learn even more about flexible or rigid-flex circuits and what they can do for your product designs, call Lenthor Engineering today.

Contact Lenthor Engineering Today >

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ITAR Compliant TUV SUD ISO 9001 2015


RoHS Compliant IPC 6013 Qualified UL Approved

Lenthor Engineering Design Guide

Our "Flexible Circuit Design Guide" shows requirements for materials, product performance, and quality of Lenthor's Flexible Circuits.

Request the Design Guide >