Selective crack suppression during deformation in metal films on polymer substrates using electron beam irradiation

Title
Selective crack suppression during deformation in metal films on polymer substrates using electron beam irradiation
Authors
안재평김동익심철휘이소연박경렬강성규이지훈전은채한흥남주영창김창순최인석
Keywords
Crack; Deformation; metal films; electron beam irradiation
Issue Date
2019-10
Publisher
Nature Communications
Citation
VOL 10-4454-8
Abstract
While cracks are usually considered detrimental, crack generation can be harnessed for various applications, for example in ceramic materials, via directing crack propagation and crack opening. Here, we find that electron beam irradiation prompts a crack suppression phenomenon in a copper (Cu) thin film on a polyimide substrate, allowing for the control of crack formation in terms of both location and shape. Under tensile strain, cracks form on the unirradiated region of the Cu film whereas cracks are prevented on the irradiated region. We attribute this to the enhancement of the adhesion at the Cu– polyimide interface by electrons transmitted through the Cu film. Finally, we selectively form conductive regions in a Cu film on a polyimide substrate under tension and fabricate a strain-responsive organic lightemitting device.
URI
http://pubs.kist.re.kr/handle/201004/70462
ISSN
2041-1723
Appears in Collections:
KIST Publication > Article
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