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Fabrication of polyimide films with imaging quality using a spin-coating method for potential optical applications

  • Danbo Mao EMAIL logo , Gang Lv , Guohan Gao and Bin Fan
Published/Copyright: October 24, 2019
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 39 Issue 10

Abstract

Optical polyimide (PI) films were prepared by spin-coating from nearly non-volatile dimethylacetamide (DMAc) solutions. The uniformity of film thickness met the requirements of diffraction imaging quality. The results show that the final rotating speed ω, dynamic viscosity η, and initial polymer solid concentration c are the main factors affecting the film thickness T, and an empirical relationship which describes the film thickness as a function of the measured parameters was established to be T∝c3.473,  η0.586,  ω−0.811. Moreover, the viscosity dependence on concentration is system specific. Unlike traditional photoresist, the thickness uniformity of the PI film is determined by both spinning and precure process, which is intensively discussed in the present work. Uniform, 22-μm thick, PI films with transmitted wavefronts peak to valley (PV) ≤ 1/5 λ and root mean square (RMS) ≤ 1/50 λ were prepared under the optimum process: spin speed 900 rpm, initial fluid viscosity 10,500 cp, final spin time 120 s, precure temperature 70°C, spin process repeated 3 times. The results will find use in the production of optical quality membrane for ultra-lightweight optics or other applications.

Keywords: imaging quality films; polyimide films; spin-coating; thickness uniformity; transmitted wavefront

Funding source: National Key R&D Program of China

Award Identifier / Grant number: 2016YFB0500200

Funding statement: This research was supported in part by the National Key R&D Program of China (grant no. 2016YFB0500200).

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Received: 2019-05-30
Accepted: 2019-09-24
Published Online: 2019-10-24
Published in Print: 2019-11-26

©2019 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Characterization and corrosion resistance of ultra-high molecular weight polyethylene composite coatings reinforced with tungsten carbide particles in hydrochloric acid medium
  4. Tribological properties of PAANa/UHMWPE composite materials in seawater lubrication
  5. Preparation and assembly
  6. Acrylic acid-chitosan blend hydrogel: a novel polymer adsorbent for adsorption of lead(II) and copper(II) ions from wastewater
  7. Efficient preparation of PDMS-based conductive composites using self-designed automatic equipment and an application example
  8. Significant improvement of the low-temperature toughness of PVC/ASA/NBR ternary blends through the concept of mismatched thermal expansion coefficient
  9. Chitosan surface modified PLGA nanoparticles loaded with brigatinib for the treatment of non-small cell lung cancer
  10. Fabrication of polyimide films with imaging quality using a spin-coating method for potential optical applications
  11. Engineering and processing
  12. An experimental study on the micro- and nanocellular foaming of polystyrene/poly(methyl methacrylate) blend composites
  13. Barrel heating with inductive coils in an injection molding machine
  14. Influence of temperature dependence on the structural characteristics of polyoxymethylene/poly(lactic acid) blends by injection molding
  15. Annual reviewer acknowledgement
  16. Reviewer acknowledgement Journal of Polymer Engineering volume 39 (2019)
https://doi.org/10.1515/polyeng-2019-0177
Keywords for this article
imaging quality films; polyimide films; spin-coating; thickness uniformity; transmitted wavefront

Articles in the same Issue

  1. Frontmatter
  2. Material properties
  3. Characterization and corrosion resistance of ultra-high molecular weight polyethylene composite coatings reinforced with tungsten carbide particles in hydrochloric acid medium
  4. Tribological properties of PAANa/UHMWPE composite materials in seawater lubrication
  5. Preparation and assembly
  6. Acrylic acid-chitosan blend hydrogel: a novel polymer adsorbent for adsorption of lead(II) and copper(II) ions from wastewater
  7. Efficient preparation of PDMS-based conductive composites using self-designed automatic equipment and an application example
  8. Significant improvement of the low-temperature toughness of PVC/ASA/NBR ternary blends through the concept of mismatched thermal expansion coefficient
  9. Chitosan surface modified PLGA nanoparticles loaded with brigatinib for the treatment of non-small cell lung cancer
  10. Fabrication of polyimide films with imaging quality using a spin-coating method for potential optical applications
  11. Engineering and processing
  12. An experimental study on the micro- and nanocellular foaming of polystyrene/poly(methyl methacrylate) blend composites
  13. Barrel heating with inductive coils in an injection molding machine
  14. Influence of temperature dependence on the structural characteristics of polyoxymethylene/poly(lactic acid) blends by injection molding
  15. Annual reviewer acknowledgement
  16. Reviewer acknowledgement Journal of Polymer Engineering volume 39 (2019)
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