Simulation-Guided Analysis towards Trench Depth Optimization for Enhanced Flexibility in Stretch-Free, Shape-Induced...

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Stretch-free, shape-induced metal interconnects are crucial for flexible electronics.
• Current fabrication methods for these interconnects require optimization for simplified production and enhanced flexibility.

Purpose of the Study:

• To optimize the planar manufacturing scheme for stretch-free, shape-induced metal interconnects.
• To maximize structural flexibility concerning stress and strain.
• To simplify the fabrication process.

Main Methods:

• Utilizing lithographic processes to create arc-shaped resist templates within trenches between silicon islands.
• Employing numerical simulations to investigate the impact of trench depth on stress distribution.
• Optimizing trench filling with resists by varying spin coating speeds.

Main Results:

• Simulations indicate that increased metal bridge penetration into trenches converts tensile load to shear force, potentially increasing strain capacity.
• Optimized resist filling through spin speed variation was achieved.
• Fabricated metal bridges demonstrated current-voltage behavior consistent with theoretical resistance.

Conclusions:

• The optimized planar manufacturing scheme successfully produces flexible electrical interconnects.
• The island-bridge array structures exhibit functional flexibility, suitable for various electronic applications.
• Trench depth is a critical parameter influencing stress distribution and overall structural flexibility.