Characterization of Parylene C as protective layer on micro-piezoelectric printheads

Lu, Bingwen; Yin, Zhifu; Zou, Helin; Zhi, Lisha; Feng, Jianbo

doi:10.1016/j.mssp.2015.07.037

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…The TGA thermogram [Figure (b)] shows that the as‐deposited parylene C is stable up to 400°C as already observed in previous work, suggesting that parylene C can be used up to this high temperature. This stability is however not so obvious, as further demonstrated by FTIR analysis.…”

Section: Resultssupporting

confidence: 75%

Annealing for the improvement of the capabilities of parylene C as electret

Kachroudi

Lagomarsini

Mareau

et al. 2018

J of Applied Polymer Sci

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Parylene C is a polymer elaborated by chemical vapor deposition and is particularly useful for the coating of deformed structures. New‐generation soft energy harvesting electrostatic generators can be of complex shape. These generators need electret material in order for them to function. It could thus be interesting to incorporate parylene C in this device. However, this polymer suffers from bad retention of trapped charges after corona discharge and a poor thermal stability of these charges. In this work, parylene C polymers were subjected to specific annealing before corona charging. This induces strong changes in the crystallinity of the material. Atomic force microscopy and X‐ray diffraction quantified the crystalline nature of parylene C following the annealing temperature. Surface potential decay of corona‐charged parylene C demonstrated that annealing to about 150°C is beneficial for the trapping of charges for a long time (analysis over 12 days). At the same time, thermal stability of the electret parylene C is achieved up to 100°C. Spherulites with a specific area close to the surface of the polymer could explain such performances due to their influence on the distribution of traps. Dielectric analysis does not confirm that the decay of surface charges is correlated to the dynamics of polymer chains, although the moving of chains probably influences the flowing of these charges. In sum, annealed parylene C appears to be a new interesting candidate for electret‐based electrostatic generators. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46908.

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Section: Resultssupporting

confidence: 75%

Annealing for the improvement of the capabilities of parylene C as electret

Kachroudi

Lagomarsini

Mareau

et al. 2018

J of Applied Polymer Sci

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“…[3][4][5][6] One of these technologies involves the use of a poly-monochloro-p-xylylene (parylene-C) coating, which is widely used as a conformal coating layer owing to its exceptional chemical resistance and gas barrier properties. [7][8][9][10] DOI: 10.1002/admi. 202400089 The performance of optoelectronic devices, such as organic light-emitting diodes (OLEDs) and organic solar cells (OSCs), is significantly influenced by the refractive index of the thin film.…”

Section: Introductionmentioning

confidence: 99%

“…[ 3–6 ] One of these technologies involves the use of a poly‐monochloro‐p‐xylylene (parylene‐C) coating, which is widely used as a conformal coating layer owing to its exceptional chemical resistance and gas barrier properties. [ 7–10 ]…”

Section: Introductionmentioning

confidence: 99%

Application of Nanostructured Parylene‐C Films for Improved Optical Characteristics of Organic Light‐Emitting Diodes

Kim,

Baek,

Boo

et al. 2024

Adv Materials Inter

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Anti‐reflection (AR) characteristics on the display surface and light outcoupling efficiency are significant factors for controlling external and internal light in organic light‐emitting diodes (OLEDs), respectively. This paper presents the fabrication of moth‐eye nanostructured parylene‐C films that simultaneously achieve optimized AR characteristics and enhanced OLED performance. AR performance is optimized by varying the nanostructure dimensions, resulting in a nanostructured film with a reflectance of <1%. Furthermore, applying this nanostructured film to OLEDs improved the light outcoupling efficiency by 40% compared with the reference device. Therefore, employing nanostructured parylene‐C films to enhance the optical characteristics of OLEDs is proposed.

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“…The most frequently used parylene is parylene C [poly(monochloro-pxylylene)] in which one of the aromatic hydrogen atoms on each benzene ring is replaced by a chlorine atom. 9,10) Parylene C exhibits a good balance between mechanical and electronic characteristics; it can also be deposited more rapidly compared to others in the family.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical properties of the parylene C dimer under vacuum

Yamada

Koshiba

Horike

et al. 2020

Jpn. J. Appl. Phys.

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Herein, we report the thermophysical properties of dichloro-[2,2]-paracyclophane (the parylene C dimer) under vacuum. The parylene C dimer is the raw material used to prepare parylene C, a thin film known for its useful dielectric and barrier properties. In order to investigate the first step in the synthesis of parylene C by chemical vapor deposition, the sublimation, evaporation, and melting behavior of the parylene C dimer was examined by simultaneous thermogravimetry/differential thermal analysis (TG–DTA) under vacuum and at atmospheric pressure. The evaporation onset temperatures, saturation vapor pressures, and the phase-transition temperatures of the parylene C dimer were quantified by TG–DTA at various pressures. The evaporation and sublimation temperature easily decreased by increasing the level of vacuum, while the melting temperature was independent of the external pressure. Our results led to the construction of a pressure–temperature phase diagram.

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Characterization of Parylene C as protective layer on micro-piezoelectric printheads

Cited by 6 publications

References 17 publications

Annealing for the improvement of the capabilities of parylene C as electret

Annealing for the improvement of the capabilities of parylene C as electret

Application of Nanostructured Parylene‐C Films for Improved Optical Characteristics of Organic Light‐Emitting Diodes

Thermophysical properties of the parylene C dimer under vacuum

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