Review of flexible and transparent thin-film transistors based on zinc oxide and related materials
Zhang Yong-Hui1, Mei Zeng-Xia1, †, Liang Hui-Li1, Du Xiao-Long1, 2, ‡
       

FESEM image of cracks in Al2O3 film with a thickness of 200 nm on PEN after 0.6% strain.[66]