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Title: Improvement in mechanical and barrier properties of polyethylene blown films using atomic layer deposition

Recently, thin films deposited on polymer substrates have been widely utilized as encapsulation barriers in electronic applications such as flexible displays, packaging films, and organic light-emitting diodes. The barrier and mechanical properties of these films are critical aspects when using them for protecting the inner modules of electronic devices from environmental factors such as moisture, oxygen, and sunlight. In particular, polymers can be degraded or decomposed more easily than other materials under such environmental conditions. Therefore, polymer films can be deposited using thin functional materials; however, suitable deposition methods for polymers are scarce owing to many limitations such as low melting/glass transition temperature, thermal degradation, and oxidation. In this study, a thin alumina oxide film was deposited on a high-density polyethylene blown film by using atomic layer deposition. The mechanical and barrier properties of the alumina oxide film deposited on the polyethylene film were characterized by a microtensile test and water vapor transmission rate test. Process conditions such as process temperature, plasma surface treatment, and number of cycles were varied to ascertain the reliability of the thin alumina oxide film deposited on the high-density polyethylene blown film. The results showed that the barrier property of the deposited film improved uponmore » the application of plasma surface treatment, and that its mechanical properties varied under different process conditions.« less
Authors:
; ; ; ; ;  [1] ;  [2]
  1. School of Mechanical Engineering, Korea University, Seoul 136-707 (Korea, Republic of)
  2. Mold and Die Technology R and D Group, Korea Institute of Industrial Technology, Incheon 406-840 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22258663
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Vacuum Science and Technology. A, Vacuum, Surfaces and Films; Journal Volume: 32; Journal Issue: 1; Other Information: (c) 2014 American Vacuum Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM OXIDES; DENSITY; DEPOSITION; ELECTRONIC EQUIPMENT; ENCAPSULATION; GLASS; LIGHT EMITTING DIODES; MECHANICAL PROPERTIES; POLYETHYLENES; SUBSTRATES; SURFACE TREATMENTS; THERMAL DEGRADATION; THIN FILMS; TRANSITION TEMPERATURE; WATER VAPOR