-
- News
- Books
Featured Books
- pcb007 Magazine
Latest Issues
Current IssueThe Growing Industry
In this issue of PCB007 Magazine, we talk with leading economic experts, advocacy specialists in Washington, D.C., and PCB company leadership to get a well-rounded picture of what’s happening in the industry today. Don’t miss it.
The Sustainability Issue
Sustainability is one of the most widely used terms in business today, especially for electronics and manufacturing but what does it mean to you? We explore the environmental, business, and economic impacts.
The Fabricator’s Guide to IPC APEX EXPO
This issue previews many of the important events taking place at this year's show and highlights some changes and opportunities. So, buckle up. We are counting down to IPC APEX EXPO 2024.
- Articles
- Columns
Search Console
- Links
- Events
||| MENU - pcb007 Magazine
Round Robin of High-Frequency Test Methods by IPC-D24C Task Group (Part 1)
July 22, 2016 | Glenn Oliver, Jonathan Weldon, et al. DUPONT*Estimated reading time: 1 minute
This paper was originally published in the proceedings of IPC APEX EXPO, Las Vegas, Nevada, February 2016. It won the Best Paper Award for the conference.
Abstract
Currently there is no industry standard test method for measuring dielectric properties of circuit board materials at frequencies greater than about 10 GHz. Various materials vendors and test labs take different approaches to determine these properties. It is common for these different approaches to yield varying values of key properties like permittivity and loss tangent. The D-24C Task Group of IPC has developed this round robin program to assess these various methods from the “bottom up” to determine if standardized methods can be agreed upon to provide the industry with more accurate and valid characteristics of dielectrics used in high-frequency and high-speed applications.
Problem Statement
Accurate values of relative permittivity (ɛr) and loss tangent (tan δ) are important characteristics for designers and fabricators in predicting electrical performance of circuits at high frequencies[1]. The most common method for evaluating these parameters at frequencies up to 10 GHz is described in IPC-TM-650-2.5.5.5[2]. This method is equivalent to ASTM-D-3380[3]. This method excites a stripline resonator at both ends with the dielectric under test comprising most of the volume. The stripline is created by establishing intimate contact using a constant clamp force. This method is highly repeatable and is optimized for QA testing at a specific frequency. This method is not well suited for characterizing at frequencies higher than 10 GHz.
To read this entire article, which appeared in the July 2016 issue of The PCB Magazine, click here.
Suggested Items
HQ NextPCB of HQ Electronics Debut on the International Stage for Electronics Manufacture at IPC APEX 2024
05/01/2024 | PRNewswireHQ NextPCB of HQ Electronics, a leading Chinese-based multilayer PCB manufacturer and assembly house showcased its industrial prowess on the international stage for the first time at the IPC APEX Expo 2024.
IPC's Vision for Empowering PCB Design Engineers
04/30/2024 | Robert Erickson, IPCAs architects of innovation, printed circuit board designers are tasked with translating increasingly complex concepts into tangible designs that power our modern world. IPC provides the necessary community, standards framework, and education to prepare these pioneers as they explore the boundaries of what’s possible, equipping engineers with the knowledge, skills, and resources required to thrive in an increasingly dynamic field.
North American EMS Industry Down 4% in March
04/29/2024 | IPCIPC announced the March 2024 findings from its North American Electronics Manufacturing Services (EMS) Statistical Program. The book-to-bill ratio stands at 1.31.
Real Time with… IPC APEX EXPO 2024: A Global Presence in PCB Manufacturing
04/29/2024 | Real Time with...IPC APEX EXPORob DiGiovanni, VP of sales for the Americas at STARTEAM Global, discusses the company's global presence in PCB manufacturing. As he explains, the firm operates facilities across Europe, Asia, and North America, specializing in serving contract manufacturers in the automotive and medical industries. They emphasize quality and meeting OEM standards, focusing on offshore supply and non-Chinese factories in the North American market. The company has grown through acquisitions and rebranding to offer multiple products.
EIPC Issues Letter of Urgency
04/29/2024 | Alun Morgan, EIPCAlun Morgan, president of EIPC, issued a letter last week in an effort to raise awareness of the state of PCB manufacturing in Europe. He writes, "The European PCB manufacturing industry and its supply base has been steadily shrinking since the dot com crash at the start of the millennium. European demand for PCBs and assemblies has, however, continued to grow, thus creating an ever-widening gap between European domestic capacity and consumption. The risks posed by this imbalanced supply and demand pattern came into sharp focus during the Covid-19 pandemic which caused chaos in extended supply chains across the world and resulted in widespread shortages."