# Strain-Induced Modifications of Thin Film Silicon Membranes Through Physical Bending

## TL;DR

This paper introduces a simple method to create and maintain strain in silicon by physically bending it, which could improve silicon-based device performance.

## Contribution

A novel, cost-effective method for inducing and maintaining strain in silicon through physical bending is proposed.

## Key findings

- Strain levels up to 0.4% can be permanently maintained in silicon after bending.
- Bending-induced strain was verified experimentally using electron backscatter diffraction.
- The method offers a promising alternative to complex strain engineering techniques.

## Abstract

Silicon, being the fundamental material for modern semiconductor devices, has seen continuous advancements to enhance its electrical and mechanical properties. Strain engineering is a well-established technique for improving the performance of silicon-based devices. In this paper, we propose a simple method for inducing and permanently maintaining strain in silicon through pure physical bending. By subjecting the silicon substrate to a controlled bending process, we demonstrate the generation of strain levels that persist even after the removal of external stress, with a maximum strain value of 0.4%. We present a comprehensive study of the mechanics behind this phenomenon, a full finite element mechanical model, and experimental verification of the bending-induced strain in Si membranes using electron backscatter diffraction measurements. Our findings show the potential of this approach for strain engineering in high-performance silicon-based technologies without resorting to complex and expensive fabrication techniques.