Optical techniques articles within Polymer Journal

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• Note | 16 July 2014

  Effects of molecular weight on the local deformation of photo-cross-linked polymer blends studied by Mach–Zehnder interferometry

  Recovery-after-crosslink behavior observed for PEA-A/PEA blends. For PEA in the matrix with molecular weight smaller than the entanglement molecular weight Me, the recovery was observed, whereas the shrinkage continues upon irradiation for PEA with larger molecular weight.

  • Tomoya Kawamoto
  • , Dan-Thuy Van-Pham
  •  & Koji Fukao

• Original Article | 22 January 2014

  Sensitivity of a chemically amplified three-component resist containing a dissolution inhibitor for extreme ultraviolet lithography

  A bis(tert-butyl) isophthalate (B-IP) was utilized as a dissolution inhibitor in chemically amplified three-components resist. In extreme ultraviolet (EUV) exposed area, tert-butyl groups of B-IP were decomposed by the effect of protons generated from photo-acid generator, and B-IP was converted to a carboxylic acid, being played a role of dissolution promoter. Furthermore, B-IP was acted as a plasticizer in the resist and the protons were diffused through the resist easily. The resist containing B-IP was improved its sensitivity and dissolution contrast, although the properties are a relation of trade-off.

  • Hideo Horibe
  • , Keita Ishiguro
  •  & Seiichi Tagawa

• Original Article | 18 April 2012

  Morphology of nanoimprinted polyimide films fabricated via a controlled thermal history

  The surface of polyimide (PI) film was successfully patterned by nanoimprinting poly(amic acid) (PAA) film and then hard baking. An appropriate nanoimprinting process was established through the study of the thermal and dynamic mechanical properties of PAA and PI film. Atomic force microscopy revealed that line pattern was transferred from silicon mold to PI film successfully and the nanostructures remain undamaged even though a larger shrinkage took place during the hard baking.

  • Sudu Siqing
  • , Hui Wu
  •  & Atsushi Takahara

• Invited Review | 26 May 2010

  Rewritable holograms based on azobenzene-containing liquid-crystalline polymers

  The design and preparation of azobenzene-containing polymers showing a large photoinduced change in refractive index, and their applications to rewritable Raman-Nath and Bragg holograms are reviewed. Holographic performance has been remarkably improved with regard to diffraction efficiency, response time and multiplicity by development of newly designed polymer systems.

  • Atsushi Shishido