-
-
News
News Highlights
- Books
Featured Books
- pcb007 Magazine
Latest Issues
Current IssueAdvancing the Advanced Materials Discussion
Moore’s Law is no more, and the advanced material solutions to grapple with this reality are surprising, stunning, and perhaps a bit daunting. Buckle up for a dive into advanced materials and a glimpse into the next chapters of electronics manufacturing.
Inventing the Future With SEL
Two years after launching its state-of-the-art PCB facility, SEL shares lessons in vision, execution, and innovation, plus insights from industry icons and technology leaders shaping the future of PCB fabrication.
Sales: From Pitch to PO
From the first cold call to finally receiving that first purchase order, the July PCB007 Magazine breaks down some critical parts of the sales stack. To up your sales game, read on!
- Articles
- Columns
- Links
- Media kit
||| MENU - pcb007 Magazine
PCB Requirements for E-Mobility
March 23, 2021 | I-Connect007 Editorial TeamEstimated reading time: 3 minutes

Nolan Johnson, Barry Matties, and Happy Holden speak with Christian Klein, section manager for PCBs in the automotive electronics division, about Bosch’s recent presentation on PCB requirements of the future in regard to automotive and electro mobility trends and challenges.
Nolan Johnson: We’ve been looking through the presentation from Bosch on requirements for PCBs going on in the future, and there are quite a lot of requirements. How do you see the requirements for printed circuit board manufacturing for automotive playing out? What do you see as the future landscape?
Christian Klein: That depends on the area or on the use case. We have two big megatrends. One is electro mobility and the other one is connected cars. These megatrends require different technologies. For example, electro mobility needs substrates on which we can integrate power components at temperatures up to 160°C, perhaps even higher, as well as currents up to several hundred amps. Those are difficult requirements for these kinds of PCBs. On the other side, we have PCBs for computers. They are more like graphic cards or servers and are already used in the consumer industry, but not in the automotive environment. Therefore, we have to distinguish between these two use cases and with different requirements for the PCB. What is common is that they all need to survive the automotive environment.
Barry Matties: Since the presentation at the World Conference was looking at future requirements, are the requirements currently being met?
Klein: At the moment the requirements are being met. But today, electrical cars often still use power electronics based on ceramic substrates. For autonomous driving the requirements will increase. The new components need even more sophisticated HDI technology than before. Computers need a higher data rate; it is increasing every year. Therefore, we will be forced to use other materials in the future for the high-speed electronics: very low loss or ultra-low loss materials with suitable Dk and Df values. These materials are normally a bit more brittle and not that robust regarding micro-cracks like the traditional materials. Taking into account the known failure modes like CAF or micro-cracks, this could be challenging.
In the automotive environment, temperature cycling and temperature storage are important parameters. But it is the humidity for which we have to be really careful. Vehicles have subsystems that are always on with low power consumption. There could be electrochemical migration in these systems. If you have to use these new materials due to the high-speed electronic requirements, then we have to be very careful. Therefore—at the moment—we have solutions, but for the next generation with bigger bandwidth and higher frequency, we have to go to other materials, and these have to be qualified.
Matties: Are you looking at the cleaning standards and changing the requirements as you talk about the electrochemical migration?
Klein: Cleaning is always discussed because cleaning is quite difficult. The problem is that up to now nobody can offer the perfect cleaning solution. After assembly, some of the solder paste residuals could stay in small gaps below the QFPs and other components. That is very difficult to clean perfectly. Regarding the bare PCB itself we do not really see a problem. What is still on the board after the PCB production will evaporate during first reflow. Thereafter, it depends on the use case. If a designer makes the housing of the PCB quite tight and uses a pressure compensation element, the warm and humid air does not get directly onto the PCB itself, and dewing can be avoided. Therefore, we must be really careful in designing our units that dewing of water will not happen. Cleaning has not been a big topic because we use a specific design of our control units to avoid this dewing.
To read this entire interview, which appeared in the March 2021 issue of PCB007 Magazine, click here.
Testimonial
"We’re proud to call I-Connect007 a trusted partner. Their innovative approach and industry insight made our podcast collaboration a success by connecting us with the right audience and delivering real results."
Julia McCaffrey - NCAB GroupSuggested Items
Indium Experts to Deliver Technical Presentations at SMTA International
10/14/2025 | Indium CorporationAs one of the leading materials providers to the power electronics assembly industry, Indium Corporation experts will share their technical insight on a wide range of innovative solder solutions at SMTA International (SMTAI), to be held October 19-23 in Rosemont, Illinois.
Knocking Down the Bone Pile: Revamp Your Components with BGA Reballing
10/14/2025 | Nash Bell -- Column: Knocking Down the Bone PileBall grid array (BGA) components evolved from pin grid array (PGA) devices, carrying over many of the same electrical benefits while introducing a more compact and efficient interconnect format. Instead of discrete leads, BGAs rely on solder balls on the underside of the package to connect to the PCB. In some advanced designs, solder balls are on both the PCB and the BGA package. In stacked configurations, such as package-on-package (PoP), these solder balls also interconnect multiple packages, enabling higher functionality in a smaller footprint.
Indium to Showcase High-Reliability Solder and Flux-Cored Wire Solutions at SMTA International
10/09/2025 | Indium CorporationAs one of the leading materials providers in the electronics industry, Indium Corporation® will feature its innovative, high-reliability solder and flux-cored wire products at SMTA International (SMTAI), to be held October 19-23 in Rosemont, Illinois.
‘Create your Connections’ – Rehm at productronica 2025 in Munich
10/08/2025 | Rehm Thermal SystemsThe electronics industry is undergoing dynamic transformation: smart production lines, sustainability, artificial intelligence, and sensor technologies dominate current discussions.
Amplifying Innovation: New Podcast Series Spotlights Electronics Industry Leaders
10/08/2025 | I-Connect007In the debut episode, “Building Reliability: KOKI’s Approach to Solder Joint Challenges,” host Marcy LaRont speaks with Shantanu Joshi, Head of Customer Solutions and Operational Excellence at KOKI Solder America. They explore how advanced materials, such as crack-free fluxes and zero-flux-residue solder pastes, are addressing issues like voiding, heat dissipation, and solder joint reliability in demanding applications, where failure can result in costly repairs or even catastrophic loss.