Beyond Design: High-speed Rules of Thumb
Global PCB Connections: A Technical Overview of Long-flex Printed Circuit Boards
The Shaughnessy Report: A Handy Look at Rules of Thumb
Indium Corporation Expert to Present at iNEMI Seminar Hosted by Zestron Europe
January 25, 2024 | Indium CorporationEstimated reading time: 1 minute
Indium Corporation Regional Technical Manager and Technologist – Advanced Applications Andreas Karch will present at iNEMI’s upcoming seminar, Humidity Robustness and Isolation Coordination for e-Mobility. The seminar, hosted by ZESTRON Europe, will be held on February 1 in Ingolstadt, Germany.
Andreas’ presentation, No-Clean Flux Residues in Automotive Applications Must Meet Higher Requirements, will examine the influence of no-clean flux chemistries on the reliability of automotive PCB applications. In particular, the study focuses on failure caused by dendritic growth for high-power, low-standoff components for enhanced SIR conditions.
Due to increased automotive electrification (48V, HEV, EV) and the subsequent utilization of high-power components such as DPAKs and Power-QFNs in under-the-hood electronics, the SIR (Surface Insulation Resistance) specifications for evaluating the electrical reliability of no-clean solder paste flux chemistry have also become more stringent. For example, test voltage has increased from 5V to 10–50V, test time has increased from 168 to 500–1,000 hours, pitch has decreased from 0.5mm to 0.2–0.3mm, and minimum SIR threshold has increased from 100MΩ to 500MΩ.
No-clean solder pastes are normally used in automotive PCB assembly to solder low-standoff components such as DPAKs and power-QFNs (gap between the PCB pad and the component underbody is typically under 75µ).
“During reflow, volatiles in the flux chemistry, such as activators and solvents boil off; however, a lower standoff reduces the opportunity for the flux volatiles to vent, resulting in ‘wet’ flux residue post-reflow,” said Andreas. “It is, therefore, critical that the no-clean flux residue does not cause ionic dendritic growth and corrosion under low-standoff power components, throughout the working life of the product.”
Andreas serves as Technologist – Advanced Applications and Technical Manager for Germany, Austria, and Switzerland for Indium Corporation. He has more than 20 years of experience in automotive electronics and power electronics, including the development of advanced customized solutions. In 2014, the Austrian Patent Office awarded him the “Inventum” award for his patent for innovate LED automotive lighting as one of the top ten applicants. He is an ECQA-certified development engineer and has earned the Six Sigma Yellow Belt.
Share on:
Suggested Items
KYZEN to Spotlight KYZEN E5631, AQUANOX A4618 and Process Control at SMTA Silicon Valley Expo and Tech Forum
11/21/2024 | KYZEN'KYZEN, the global leader in innovative environmentally friendly cleaning chemistries, will exhibit at the SMTA Silicon Valley Expo & Tech Forum on Thursday, December 5, 2024 at the Fremont Marriott Silicon Valley in Fremont, CA.
AIM to Present on High Reliability and Highlight NC259FPA Ultrafine No Clean Solder Paste at SMTA South China Expo & Tech Forum
10/18/2024 | AIMAIM Solder, a leading global manufacturer of solder assembly materials for the electronics industry, is pleased to announce its participation in the upcoming SMTA South China Expo & Tech Forum taking place November 6-7 at the Shenzhen World Exhibition & Convention Center in Shenzhen, China.
Book Excerpt: The Printed Circuit Assembler’s Guide to... Low-Temperature Soldering, Vol. 2, Chapter 4
10/03/2024 |Chapter 4 of this book addresses the challenges in ensuring high electrical reliability of low-temperature solder pastes in modern electronic assembly. Also covered is the need for new-generation materials due to advancements in technology. The authors also explore the impact of flux components on electrical reliability and the formulation considerations to achieve higher reliability.
The Knowledge Base: The Pivotal Role of Solder Paste
09/16/2024 | Mike Konrad -- Column: The Knowledge BaseIn the complex world of electronics manufacturing, the humble solder paste plays a pivotal role. Often overshadowed by more conspicuous electronics assembly equipment and materials, this blend of powdered metal and flux is the unsung hero that binds the electronic circuits together. But beyond its adhesive and conductive properties, the selection of the right solder paste is crucial for ensuring the long-term reliability of electronic devices.
AIM to Present on High Reliability and Highlight NC259FPA Ultrafine No Clean Solder Paste at SMTA Penang Expo & Tech Forum
08/30/2024 | AIM SolderAIM Solder, a leading global manufacturer of solder assembly materials for the electronics industry, is pleased to announce its participation in the upcoming SMTA Penang Expo & Tech Forum taking place September 25-26 at AC Hotel Penang in Malaysia.