Center for Sustainability and Energy Technologies

You are cordially invited to attend the Lecture of Sustainability and Energy Technologies. We are pleased to have Professor Tetsu Yonezawa, Division of Materials Science and Engineering, Hokkaido University as our speaker. The topic of the lecture is " Preparation and Dispersion of Cu Nanoparticles for Semiconductor Packaging ". Further details are as follows:

1.Topic: Preparation and Dispersion of Cu Nanoparticles for Semiconductor Packaging
2.Speaker: Professor Tetsu Yonezawa
3.Abstract:
Copper nanoparticles are promising for next-gen interconnects due to high conductivity and low-cost processing. However, oxidation under ambient conditions limits their performance. We present oxidation-tolerant core–shell Cu nanoparticles with Cu₆₄O/Cu₈O-rich surfaces, enabling thermal stability and sinterability. Using sugar alcohol-based solvents, we formulate >80 wt% copper pastes with excellent dispersion and film-forming properties. Thermal analysis, in situ XRD, and sintering studies show strong bonding and conductivity below 200°C under reducing/inert atmospheres. This approach suits 3D integration, power devices, and flexible electronics, offering a practical route for copper nanoparticle use in semiconductor packaging with enhanced reliability and low-temperature processing.
4. Keywords of your speech：Copper nanoparticles, Low-temperature sintering, Oxidation control, Electronic packaging, High-concentration paste
5.Date: 2025/10/15 (Wed) 14:30~16:00
6. Venue: 1st Meeting Room of Engineering College (Engineering Building 1F)
7.Registration Deadline: 2025/10/14(Tue)

Campus Information System iCGU URL: https://i.cgu.edu.tw

Important Notes:
This lecture qualifies for 1.5 hours of training for the teaching quality seminar. All faculty and staff in attendance are required to be present for the entire session to honor the speaker. Please ensure to sign in and out personally. Attendees arriving more than 20 minutes after the start will not be allowed to sign in. Additionally, failing to sign out will result in the training hours not being counted.