About Author

Tara Dunn

Tara is a recognized industry expert with more than 20 years of experience working with: PCB engineers, designers, fabricators, sourcing organizations, and printed circuit board users. Her expertise is in flex and rigid-flex, additive technology, and quick-turn projects. She is one of the industry's top resources to get up to speed quickly on a range of subjects through her technical reference site PCBadvisor.com and contributes regularly to industry events as a speaker, writes a column in the magazine PCB007.com, and hosts Geek-a-palooza.com. Her business Omni PCB is known for its same day response and the ability to fulfill projects based on unique specifications: lead time, technology and volume.

Most Recent Posts

Flexible Circuits: Getting Started Expert Tara Dunn tackles in detail the key benefits driving designers to use flexible materials. Read now to learn more. Read Article

When Should You Use a Flex Circuit? The two predominant reasons for using flex or rigid flex, are to solve a packaging issue or reduce the space and weight of the electronics package. These two are often interrelated and space, weight and packaging, (SWaP) will continue to be a driving force in PCB design. Read Article

PCBs with Gold Traces and Conductors, Now on Flex Materials Flexible polyimide is bio-compatible and critical to many medical applications. Gold PCB traces on flex PCBs provides a fully biocompatible option. Here's how the fabrication process works. Read Article

High Density PCB Design Game Changer: 25 Micron Trace and Space ‌ Have you heard the latest development in PCB fabrication processes? High density PCB design follows the same trend seen in integrated circuits, where more functionality is packed into a smaller space. The smaller spacing in these boards makes precise manufacturing more difficult, which places important DFM rules on your high density PCB design. Now with the A-SAP™ process, you can place trace widths and spacing down to 1 mil, allowing tight Read Article

Top Tips from Experienced Flex Designers Fabrication: In general, advice given about flexible circuit fabrication is split between knowledge of the fabricator and their process, and communication. Knowledge of the printed circuit board fabrication process is not as common as it once was, and this is even more apparent with the subtleties of flex manufacturing. Understanding the manufacturing process helps to illuminate areas that are more challenging for fabrication, as well as areas Read Article

Tips for Time Critical Flex Delivery Here are some simple suggestions to reduce the chances of fabrication delivery for your flex and rigid flex designs getting held up by delays. Read Article

Flexible Circuit Designs with Large or Heavy Components One of the primary benefits of using a flexible circuit versus a rigid PCB board or wire and cable is the savings in weight and space. Flexible materials are thin, extremely light weight, and allow you to package in 3D, bending and folding to make necessary connections, allowing you to shrink the overall package size or fit additional electronics in a similarly-sized unit. As an example, a very typical two-layer construction for a flexible Read Article

Beyond the Drawing Board: A Lesson Learned in Flex Design Several recent blogs have been discussing “war stories” about flex and rigid-flex and the lessons learned when problem-solving and ultimately resolving the issue. We all have them. Flex is part art, part science, and even with the best of intentions and great attention to detail, there are occasionally “surprises” in performance. Most often they seem to defy logic until we stumble on the solution, and then of course everything is crystal clear in Read Article

Never Underestimate the Power of a Mock-Up The ability to do a 3D mock-up within your design software, is an invaluable tool that no doubt has prevented countless re-designs and revision changes. This is particularly powerful in the world of flex and rigid flex. When the circuit is intended to be bent, folded, or formed it is very easy to make a mistake with pinouts and orientation. Before the power to model this within the design tool, paper-dolls and mylar cut outs were often used to Read Article

Communication from Design to Assembly In a perfect world, a box and enclosure are designed, and then printed circuit boards or flexible circuits are designed to fit within that box perfectly, meeting all the electrical and mechanical requirements of the project. Sadly, most of us don’t get to work in that perfect world and at times must deal with challenges to that original plan. Things don’t always work as expected. Sometimes that is because something obvious was missed., Often it’s Read Article