Magnetics Business & Technology - September/October 2020 - 15
TECH TIPS
tion. Generally, most PCB manufacturers can drill via diameters
as small as 0.15mm (6 mils) and plate aspect ratios ≥ 15:1.
Additionally, the via holes should have a minimum annular
ring of 0.075mm (3 mils). Line separation is another factor that
impacts manufacturability and voltage isolation. Consequently,
larger cores are required to provide enough area for the center
via array. With conventional wound wires, one can always cram
smaller gauge wires into the window as compared to printed
circuit vias. Consequently, Embedded Magnetics will require a
core that is 20% to 50% larger than a wire wound implementation. While the price difference is small, the bigger drawback is
when there are constraints on size.
Additionally, core height determines the required panel thickness and is also a limitation. Most PCB manufacturers can
process panels up to 7 mm (0. 275") thickness. Thicker panels
are possible, yet usually require the manufacturer to re-configuration the conveyors on their etching system. While possible,
most manufactures are reluctant to reconfigure their etching
lines for a specific job.
Even with these constraints, it is still possible to address a wide
variety of Telecommunication, RF and Power applications. Part
2 of this series will provide an overview of an Ethernet media
filter realized with this technology. Part 3 will then summarize
reliability testing and look at particular details associated with
voltage isolation.
About the Author: Jim Quilici
develops PCB magnetics for
Shennan Circuits (www.scc.com.
cn). He holds an MSEE from University of Arizona and has over 30
years of experience in developing
magnetics and microelectronics.
He has been awarded 9 patents
associated with PCB magnetics. Jim also is a part-time lecturer
at California State University Sacramento where he teaches
courses on Network Analysis and Microelectronics. He can be
reached at jim.quilici@scc-america.com.
Figure 3, Artwork Example
magnetic
instrumentation
Production
Magnetizing
Systems
Standard & Custom
Systems built
with Advanced
Technologies
* Magnetizers &
Demagnetizers
* Production & Prototype
Magnetizing Fixtures
* Automated Flux Scanners
* Hard & Soft Hysteresigraphs
* Gaussmeters & Fluxmeters
* Helmholtz Coils
* KJS Associates™
Measurement Services
* ISO 17025 Accredited
Calibration
* Magnetizing Services
* Magnetic Consulting
* Prototype Design &
Fabrication
* FEA Services
* Professional Seminars
(317) 842-7500 * MAGINST.COM
www.MagneticsMag.com
September/October 2020 * Magnetics Business & Technology
15
http://www.MAGINST.COM
http://www.MagneticsMag.com
Magnetics Business & Technology - September/October 2020
Table of Contents for the Digital Edition of Magnetics Business & Technology - September/October 2020
Magnetics Business & Technology - September/October 2020
Editor’s Choice/ Features
Paramagnetic Sensors from Hummingbird at the Heart of Respiratory Ventilators Battling Covid-19
Highly Permeable Ferrite Enables 3D Cube Antennas from Neosid for 6DoF Tracking
Embedding Magnetics Achieves Reliability & Consistency, Part 1 of 3
Tech Tips
Research & Development
US Air Force Investigates Using Quantum Materials in New Navigation Tool
Product News
Industry News
Events Calendar/ Advertising Index
Visions
Magnetics Business & Technology - September/October 2020 - Magnetics Business & Technology - September/October 2020
Magnetics Business & Technology - September/October 2020 - Cover2
Magnetics Business & Technology - September/October 2020 - 3
Magnetics Business & Technology - September/October 2020 - Editor’s Choice/ Features
Magnetics Business & Technology - September/October 2020 - 5
Magnetics Business & Technology - September/October 2020 - Paramagnetic Sensors from Hummingbird at the Heart of Respiratory Ventilators Battling Covid-19
Magnetics Business & Technology - September/October 2020 - 7
Magnetics Business & Technology - September/October 2020 - Highly Permeable Ferrite Enables 3D Cube Antennas from Neosid for 6DoF Tracking
Magnetics Business & Technology - September/October 2020 - 9
Magnetics Business & Technology - September/October 2020 - 10
Magnetics Business & Technology - September/October 2020 - 11
Magnetics Business & Technology - September/October 2020 - 12
Magnetics Business & Technology - September/October 2020 - 13
Magnetics Business & Technology - September/October 2020 - Tech Tips
Magnetics Business & Technology - September/October 2020 - 15
Magnetics Business & Technology - September/October 2020 - Research & Development
Magnetics Business & Technology - September/October 2020 - 17
Magnetics Business & Technology - September/October 2020 - US Air Force Investigates Using Quantum Materials in New Navigation Tool
Magnetics Business & Technology - September/October 2020 - 19
Magnetics Business & Technology - September/October 2020 - Product News
Magnetics Business & Technology - September/October 2020 - 21
Magnetics Business & Technology - September/October 2020 - 22
Magnetics Business & Technology - September/October 2020 - 23
Magnetics Business & Technology - September/October 2020 - Industry News
Magnetics Business & Technology - September/October 2020 - 25
Magnetics Business & Technology - September/October 2020 - 26
Magnetics Business & Technology - September/October 2020 - 27
Magnetics Business & Technology - September/October 2020 - Events Calendar/ Advertising Index
Magnetics Business & Technology - September/October 2020 - 29
Magnetics Business & Technology - September/October 2020 - Visions
Magnetics Business & Technology - September/October 2020 - Cover3
Magnetics Business & Technology - September/October 2020 - Cover4
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2024mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2024marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2024januaryfebruary
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023novemberdecember
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023septemberoctober
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023julyaugust
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2023januaryfebruary
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022novemberdecember
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022septemberoctober
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022julyaugust
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2022januaryfebruary
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021novemberdecember
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021septemberoctober
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021julyaugust
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2021januaryfebruary
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020novemberdecember
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020septemberoctober
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020julyaugust
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2020januaryfebruary
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019novemberdecember
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019septemberoctober
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019julyaug
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019mayjune
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019marchapril
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2019janfeb
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2018winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2018summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2018spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2017winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2017summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2017spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2016winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2016summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2016spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2015winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2015summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2015spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2014winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2014summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2014spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2013winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2013fall
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2013summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2013spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2012winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2012fall
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2012summer
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2012spring
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2011winter
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2011fall
https://www.nxtbook.com/nxtbooks/webcom/magnetics_2011summer
https://www.nxtbookmedia.com