Made in Brazil: The Evolution and Revolution of Impedance Control in PCB Production


Reading time ( words)

The PCB industry in Brazil has gone through several changes over the last decade. Our customers have been demanding better quality and higher-reliability products more than ever before, but few things have changed as much as impedance control. PCBs with impedance control requirements have become the engine of the market, and finding solutions to fit the customer’s needs is extremely challenging.

Ten years ago, the Brazilian PCB industry was a little vague on this subject, and very few PCB shops were doing impedance testing. About five years ago, with the evolution of the national PCB industry, customers started producing prototypes requiring impedance control and the market started to develop. However, it seemed to me that neither the customers nor the PCB shops really knew what to order and to deliver at that time.

There always were differences between the specs for the board, the coupon measured, and the simulation software. As a best practice, many PCB shops used to appeal to a cross-section analysis to verify the PCB build up. In the end, impedance simulation software was more reliable than the TDR measurements.

I remember I felt a bit normal last year when I read the article written by Dan Beaulieu and Bob Tarzwell for The PCB Design Magazine, "Controlled Impedance: A Real-World Look at the PCB Side." Coupons that don’t fit the specs of the customers, cross-section analyses, differences in resin flow during lamination, copper thickness variation, and many other issues described in the article were very similar to the problems we faced daily.

Nevertheless, the industry in Brazil has gone further, pressing the suppliers to develop new controls, not yet usual to the national market.

To read this entire article, which appeared in the July 2016 issue of The PCB Magazine, click here.

Share

Print


Suggested Items

Promoting a Circular Economy in Electronics Manufacturing

09/03/2020 | Pete Starkey, I-Connect007
The sixth international Electronics Goes Green Conference was held as an online virtual. Pete Starkey provides a recap of the event, which provided insight into innovative eco-design and extended reliability from the perspective of iNEMI’s roadmap.

I-Connect007 Editor’s Choice: Five Must-Reads for the Week

08/21/2020 | Nolan Johnson, I-Connect007
This week, the top five is full of progress in technology and financial performance. It’s more evidence that the electronics industry, at its core, continues to thrive.

I-Connect007 Editor’s Choice: Five Must-Reads for the Week

07/31/2020 | Andy Shaughnessy, Design007 Magazine
Say what you will about 2020, but it certainly isn’t boring. There’s a lot going on in the PCB world, and there’s something for everyone in this week’s top five picks. And it’s all positive, despite the lingering presence of COVID-19 and its aftereffects.



Copyright © 2020 I-Connect007. All rights reserved.