Nanotechnology 2009, 20, 135204

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May 4, 2009 - space-charge-limited conduction and local filament formation and further dependent on the ... orbital energy levels of the PI film and the work functions of the top and .... The electrical transition voltage was found to be 2.1 V .... thick 6F-2TPA PI films, the 34 nm thick films do exhibit ... for every cell (figure 6).
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Programmable digital memory devices based on nanoscale thin films of a thermally dimensionally stable polyimide

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IOP PUBLISHING

NANOTECHNOLOGY

Nanotechnology 20 (2009) 135204 (7pp)

doi:10.1088/0957-4484/20/13/135204

Programmable digital memory devices based on nanoscale thin films of a thermally dimensionally stable polyimide Taek Joon Lee1,4 , Cha-Wen Chang2,4, Suk Gyu Hahm1 , Kyungtae Kim1 , Samdae Park1 , Dong Min Kim1 , Jinchul Kim1 , Won-Sang Kwon1 , Guey-Sheng Liou3,5 and Moonhor Ree1,5 1

Department of Chemistry, National Research Lab for Polymer Synthesis and Physics, Center for Integrated Molecular Systems, Polymer Research Institute, and BK School of Molecular Science, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea 2 Department of Applied Chemistry, National Chi Nan University, 1 University Road, Puli, Nantou Hsien 54561, Taiwan, Republic of China 3 Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China E-mail: [email protected] and [email protected]

Received 13 November 2008 Published 10 March 2009 Online at stacks.iop.org/Nano/20/135204 Abstract We have fabricated electrically programmable memory devices with thermally and dimensionally stable poly( N -( N  ,N  -diphenyl- N  -1,4-phenyl)- N, N -4,4 -diphenylene hexafluoroisopropylidene-diphthalimide) (6F-2TPA PI) films and investigated their switching characteristics and reliability. 6F-2TPA PI films were found to reveal a conductivity of 1.0 × 10−13 –1.0 × 10−14 S cm−1 . The 6F-2TPA PI films exhibit versatile memory characteristics that depend on the film thickness. All the PI films are initially present in the OFF state. The PI films with a thickness of >15 to