Efficient Thermobonding Process Forming a Polyurethane Based Diagnostic Catheter with Liquid Crystal Polymer

Kuert, Gerhard Frédéric; Jacomet, Marcel; Niederhauser, Thomas (27 July 2019). Efficient Thermobonding Process Forming a Polyurethane Based Diagnostic Catheter with Liquid Crystal Polymer In: Engineering in Medicine and Biology, EBMC'19 (pp. 6163-6166). IEEE 10.1109/EMBC.2019.8857913

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Diagnostic and therapeutic catheters play an inevitable role in minimal invasive medical procedures. Unfortunately, standard catheters show a limited transducer density and high production efforts. We propose a novel catheter design and manufacturing method using a liquid crystal polymer (LCP)-based flexible printed circuit board (FPCB) and a thermoplastic polyurethane (TPU) elastomer tube. Both components are bond together with a low cost, additive free lamination process at a re-flow temperature of 250° C. The lamination process is improved with a laser welding seam and LCPintegrated microholes preventing delamination. Standardized Mechanical tests were conducted to characterize the bonding. A Peel strength of up to 8.5 N in the radial direction and a non plastic elongation in the axial direction of 10% provide evidence that the thermobonding process is suitable for the production of flexible and mechanically durable medical catheters featuring high electrode densities.

Item Type:

Conference or Workshop Item (Paper)


School of Engineering and Computer Science > Institute for Human Centered Engineering (HUCE)
BFH Centres and strategic thematic fields > BFH centre for Health technologies


Kuert, Gerhard Frédéric;
Jacomet, Marcel and
Niederhauser, Thomas0000-0003-2633-0844


R Medicine > R Medicine (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TK Electrical engineering. Electronics Nuclear engineering






Marcel Jacomet

Date Deposited:

09 Oct 2019 09:14

Last Modified:

08 Oct 2021 02:30

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