Ali, I;
Xue, F;
Henriquez, CP;
Niederhoffer, T;
Idil, AS;
Iang, DJ;
Lancashire, HT;
(2024)
Initial L ife Test of Silicone E ncapsulated FR 4 Printed Circuit Boards for Pre-Clinical A ctive Implants.
In:
IMAPSource Proceedings 2023 (EMPC).
(pp. pp. 224-227).
IMAPS - International Microelectronics Assembly and Packaging Society
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Abstract
Silicone encapsulated FR 4 printed circuit boards may provide a rapid solution for protecting pre-clinical prototype implant electronics. Interdigitated electrodes (IDE s) with and without solder coating were manufactured on Cu-FR 4 laminates and silicone encapsulated (N = 14). IDE s were aged in saline and change in impedance was measured. Solder coated IDE s had stable 1 kHz impedances throughout the aging period with promising lifetimes for pre-clinical prototypes. A single uncoated IDE failed with a fall in impedance and verdigris. Other uncoated IDEs showed increasing impedance and dark copper(II) oxide. Failures attributable to contaminants and moisture ingress are under investigation.
| Type: | Proceedings paper |
|---|---|
| Title: | Initial L ife Test of Silicone E ncapsulated FR 4 Printed Circuit Boards for Pre-Clinical A ctive Implants |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.4071/001c.94758 |
| Publisher version: | http://dx.doi.org/10.4071/001c.94758 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | life test, encapsulation, printed circuit board, impedance, FR4, solder |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10190389 |
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