Preparation of vertically oriented aromatic polyester thin films by thermal chemical vapor deposition

Aromatic polyesters exhibit high thermal conductivity and large nonlinear optical effects by controlling the orientation of their main chains. Especially in recent years, with the development of flexible optical and electronic devices utilizing polymer thin films, out-of-plane orientation control in...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2024-01, Vol.63 (1), p.15505
Main Authors: Matsubara, Ryosuke, Aida, Shuichiro, Fukushima, Sota, Kubono, Atsushi
Format: Article
Language:English
Subjects:
aromatic polyesters
Chemical vapor deposition
Film growth
Nonlinear optics
orientation control
Polyester resins
Polymer films
Substrates
Surface treatment
thermal chemical vapor deposition
Thermal conductivity
thin film growth
Thin films
Vapor phases
Vertical orientation
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Summary:Aromatic polyesters exhibit high thermal conductivity and large nonlinear optical effects by controlling the orientation of their main chains. Especially in recent years, with the development of flexible optical and electronic devices utilizing polymer thin films, out-of-plane orientation control in thin films on the order of several hundred nm is required. However, due to the rigidity of aromatic polyesters, it is difficult to control vertical orientation in thin film growth from melt or solution. In this study, we attempted to control the vertical orientation of aromatic polyester thin films from the vapor phase using a thermal CVD. From a single head-to-tail type monomer, aromatic polyester thin films with the most primitive structure, whose mp exceeds 500 °C, were successfully grown. Furthermore, it was found that the vertical orientation of the main chains was enhanced by substrate surface treatment.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ad1938