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Feasibility of Parylene C for encapsulating piezoelectric actuators in active medical implants

  • Parylene C is well-known as an encapsulation material for medical implants. Within the approach of miniaturization and automatization of a bone distractor, piezoelectric actuators were encapsulated with Parylene C. The stretchability of the polymer was investigated with respect to the encapsulation functionality of piezoelectric chips. We determined a linear yield strain of 1% of approximately 12-μm-thick Parylene C foil. Parylene C encapsulation withstands the mechanical stress of a minimum of 5×105 duty cycles by continuous actuation. The experiments demonstrate that elongation of the encapsulation on piezoelectric actuators and thus the elongation of Parylene C up to 0.8 mm are feasible.

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Author:Alina Kohler, Felix Blendinger, Sonja Müller, Ulrich MeschederORCiDGND, Volker BucherORCiDGND
Parent Title (German):Frontiers in Medical Technology
Document Type:Article (peer-reviewed)
Year of Completion:2023
Release Date:2023/11/23
Tag:Active implant; Encapsulation; Parylene C; Piezoelectric actuator; Stretchability
Article Number:1211423
Page Number:6
Open-Access-Status: Open Access 
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International