The Printed Circuit Designer's Guide to... ™
Flex and Rigid-Flex Fundamentals

by: Anaya Vardya and David Lackey, American Standard Circuits

Flexible circuits are rapidly becoming a preferred interconnection technology for electronic products. Thin, lightweight and formable, they allow designers extra degrees of freedom in creating their products. However, flexible circuits, by their intrinsic nature, require a good deal more understanding and planning than their rigid PCB counterparts to be assured of first pass success. This concise and highly useful book on flexible circuits from ASC was written to provide circuit designers, both new and seasoned, with valuable and important information that will help to assure their first pass success in getting their products to market.

ISBN: 978-0-9796189-4-9

Anaya Vardya
Anaya has over 30 years of experience in electronics manufacturing with several companies in the US, Canada and the Far East. He has over a decade of executive management experience in public companies manufacturing PWBs. Anaya has managed a variety of facets of PCB manufacturing at companies like IBM, Continental Circuits, Merix, Coretec and now American Standard Circuits.
One of Anaya’s peers described him as " of the most driven engineering managers I have ever worked with. He has a keen eye for details and recognizes the big picture." He has extensive experience in virtually every aspect of PCB manufacturing operations including supply chain management and quality control. It is this background that allows Anaya to not only serve as ASC’s CEO, but as an expert ready to assist you with whatever questions you may have.

David Lackey
Dave has been involved with manufacturing PCBs since 1980 and has worked in various shops, most of which had military certifications and utilized higher technology.
Dave has extensive experience building metal-core boards and PCBs requiring thermal management solutions, as well as flex and rigid-flex boards.
Having worked in most departments throughout the years, Dave has developed a strong engineering background and is knowledgeable in most industry technologies. His background enables him to work not only with buyers but design engineers and quality and manufacturing personnel as well. Most questions can be answered on the spot, without having to deal with multiple visits, e-mails, or calls.

American Standard Circuits (ASC) and Sunstone Circuits have joined forces to create a formidable entity in PCB manufacturing, leveraging over 50 years of combined industry expertise. This unified collaboration harnesses ASC's comprehensive solutions expertise and Sunstone's focus on rapid turnaround, top-quality PCBs, and unparalleled customer support.

Our commitment extends to providing a diverse range of PCB types customized for various industries, including military/aerospace, industrial, commercial, medical, telecommunications, consumer electronics, RF/microwave, and transportation sectors. ASC-Sunstone stands as a hub for excellence in PCB manufacturing, simplifying procurement while delivering top-notch products.

At the forefront of technology, our ongoing research and development in thermal management and embedded passive components enable us to meet the demands of ever-evolving computing devices. Our specialties encompass hybrid circuits, exotic materials, blind and buried vias, controlled impedance, and patented thermal management solutions.

Quality is our hallmark. ASC holds certifications such as AS9100 Rev. C, ISO 9001:2008, and MIL PRF 31032, reinforced by state-of-the-art process control systems. Rigorous SPC controls, automated optical inspection, metallographic cross-section, and electrical test facilities ensure we meet and exceed the high standards set by our customers.

We understand the urgency of timelines in the industry. ASC-Sunstone prides itself on quick-turn capabilities across all our manufacturing technologies. Our cutting-edge front-end engineering CAM systems and rapid-response manufacturing processes enable us to provide swift solutions for our customers.

For more information on our wide range of offerings and quick-turn options, visit Together, ASC and Sunstone set a new standard of excellence in PCB manufacturing, offering unmatched expertise, support, and top-quality products across diverse industry sectors.

This book has been technically reviewed by the following experts:

Tom Woznicki, "The Flexdude"

Lee Ritchey

Chapter Summaries

  • Chapter 1

    Chapter 1

    Chapter 1 discusses material call-outs for flexible and rigid-flex circuits, including missing call-outs, copper type and thickness, and cover layer or solder mask over flex.
  • Chapter 2

    Chapter 2

    Chapter 2 explains how to design and layout flex and rigid-flex designs that will be right the first time, focusing on fabrication specifications, manufacturing tolerances, controlled impedance, and more.
  • Chapter 3

    Chapter 3

    Chapter 3 breaks down the information that must be provided in the final data package you deliver to your flex fabricator, such as materials, class, plating requirements, artwork, and layer count.

Print-on-demand paperbacks are available for this title. Click below to order from our distributor.

What Our Readers Are Saying

The Companion Guide to…
Flex and Rigid-Flex Fundamentals

This compact guide, written by topic experts at American Standard Circuits, is designed to provide additional insights and best practices for those who design or utilize flexible and/or rigid-flex circuit boards. Topics covered include trace routing options, guidelines for process optimization, dynamic flexing applications, rigid-to-flex transition and more.

The Printed Circuit Designer's Guide to...Flex and Rigid-Flex Fundamentals, the new book on flex/rigid-flex printed circuit boards by American Standard Circuits is a must-have desk reference for any PCB designer, OEM/ODM, contract manufacturer and PCB fabricator.

Steve Williams
Full Review

Contact the Author

For technical support click here

Steve Williams

The Printed Circuit Designer's Guide to...Flex and Rigid-Flex Fundamentals, the new book on flex/rigid-flex printed circuit boards by American Standard Circuits is a must have desk reference for any PCB designer, OEM/ODM, contract manufacturer and PCB fabricator. American Standard builds some of the most advanced technology in our industry, and they provide a look behind the curtain at this challenging topic. The book is a wealth of information for anyone in the supply chain using flex/rigid-flex technology.

For designers, there is guidance on key callouts, design considerations and material sets or optimum manufacturability. For PCB fabricators, there are plenty of do’s and don’ts gleaned from decades of first-hand experience. For OEMs/ODMs, the author reviews factors that are cost drivers in this technology arena. Of particular interest to contract manufacturers is the information on what needs to be included in the data package they receive from a customer that will be transferred to the PCB fabricator.

There is something here for everyone. I highly recommend downloading this book right away!

Steve Williams
The Right Approach Consulting

Tom Woznicki, Tom Woznicki, CID+, is the founder of Flex Circuit Design Company in San Jose, California. He founded the company in 1992 after serving as a technical sales engineer for Rogers Corp.

He has designed over 1,000 flex and rigid flex circuits for fiberoptics, disk drives, medical equipment, telecommunications, military/aerospace and many other applications. Many of these circuits require leading-edge manufacturing methods, such as additive circuitry, laser processing and microvias, as well as assembly technologies such as flip-chip and chip-on-flex.

Tom served on the team that worked on the flex circuitry for the Mars Curiosity Rover. Since 2014, Tom has been part of the team working with MIT on the Transiting Exoplanet Survey Satellite (TESS), providing PCB design services, PCB design reviews, and project management services for the focal plane circuit boards for the satellite.

Lee Ritchey Lee Ritchey is considered to be one of the industry's premier authorities on high-speed PCB and system design. He is the founder and president of Speeding Edge, an engineering consulting and training company. Ritchey conducts on-site private training courses for high technology companies and also teaches courses through Speeding Edge and its partner companies. In addition, he provides consulting services to top manufacturers of many different types of technology products including Internet, server, video display and camera tracking/scanning products.

Prior to founding Speeding Edge, Ritchey held a number of hardware engineering management positions, including program manager for 3Com Corporation and engineering manager for Maxtor. Earlier in his career, he designed RF and microwave components for the Apollo space program among others. Ritchey holds a BSEE degree from California State University, Sacramento.