Method to fabricate asymmetric wrinkles using biaxial strains
US9950462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2016 |
| Grant date | Apr 24, 2018 |
| Priority date | — |
| Expiry date | Dec 17, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2009/008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Wrinkling of supported thin films is a strain-driven phenomenon that enables scalable and low-cost fabrication of periodic micro and nano scale structures. The morphology of wrinkles depends on both the magnitude and the nature of compressive strains that are applied to the thin film. This disclosure presents the methods to fabricate asymmetric 2-D wrinkled structures using biaxial compressive strains. The method relies on the dependence of wrinkle morphology on both strains and strain paths to generate asymmetric 2D wrinkles. Asymmetry is achieved by deliberately traversing the system through a strain state that creates cracks along a preferential direction. Fabricated patterns include non-uniform zigzag wrinkles that demonstrate period doubling only along one direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.