An Automated Room Temperature Flip-Chip Mounting Process for Hybrid Printed Electronics

Area of Science:

• Materials Science
• Electronics Engineering
• Manufacturing Technology

Background:

• Hybrid printed electronics require mounting processes compatible with temperature-sensitive functional inks and substrates.
• Traditional mounting techniques often involve high temperatures, limiting material choices and device performance.
• Developing low-temperature mounting solutions is crucial for advancing printed electronics.

Purpose of the Study:

• To develop a standardized, automated, bump-less flip-chip mounting process for hybrid printed electronics.
• To utilize a room temperature curing conductive adhesive for reliable interconnections.
• To demonstrate the scalability and effectiveness of the proposed mounting process.

Main Methods:

• Implementation of a standardized interconnection design for automated flip-chip mounting.
• Dispensing of a room temperature curing conductive adhesive with controlled viscosity.
• Characterization of electrical performance using four-terminal resistance measurements.
• Assessment of mechanical integrity through shear testing.

Main Results:

• Successful realization of an automated, bump-less flip-chip mounting process operating at room temperature.
• Uniform dispensing of conductive adhesive achieved despite viscosity changes.
• Demonstrated reliable electrical and mechanical performance of the interconnections.
• Enabled fabrication of hybrid printed devices in larger batch sizes.

Conclusions:

• The developed room temperature mounting process is suitable for hybrid printed electronics, preserving the performance of sensitive components.
• The automated process facilitates scalable manufacturing and comprehensive device evaluation.
• This technology paves the way for novel hybrid printed devices, such as security applications, without thermal degradation.