Complex electronic implants and polymer packaging needs

Schoenleber, Monika; Vaghela, Jaina; Ismail, F; Grahn, Michael F.; Popa, Cătălin; Rehman, Ihtesham Ur; Vadgama, Pankaj

doi:10.1007/978-3-540-36841-0_164

Cited by 2 publications

(1 citation statement)

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“…Poly-para-xylylene, commonly referred to as parylene and its derivates, is a thin-film highly conformal polymer coating often cited as the material of choice in various biomedical applications, including for urinary tract implants [17][18][19]. Parylene coatings offer several advantages in this context.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Parylene Thin Films to Prevent Encrustation for a Urinary Bladder Pressure MEMS Sensor System

Buchwalder,

Hersberger,

Rebl

et al. 2023

Polymers

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Recent developments in urological implants have focused on preventive strategies to mitigate encrustation and biofilm formation. Parylene, a conformal, pinhole-free polymer coating, has gained attention due to its high biocompatibility and chemical resistance, excellent barrier properties, and low friction coefficient. This study aims to evaluate the effectiveness of parylene C in comparison to a parylene VT4 grade coating in preventing encrustation on a urinary bladder pressure MEMS sensor system. Additionally, silicon oxide (SiOx) applied as a finish coating was investigated for further improvements. An in vitro encrustation system mimicking natural urine flow was used to quantify the formation of urinary stones. These stones were subsequently analyzed using Fourier transform infrared spectrometry (FTIR). Encrustation results were then discussed in relation to coating surface chemical properties. Parylene C and VT4 grades demonstrated a very low encrustation mass, making them attractive options for encrustation prevention. The best performance was achieved after the addition of a hydrophilic SiOx finish coating on parylene VT4 grade. Parylene-based encapsulation proved to be an outstanding solution to prevent encrustation for urological implants.

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Section: Introductionmentioning

confidence: 99%