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Highly Linear and Stable Flexible Temperature Sensors Based on Laser‐Induced Carbonization of Polyimide Substrates for Personal Mobile Monitoring
Author(s) -
Gandla Srinivas,
Naqi Muhammad,
Lee Mingoo,
Lee Jung Joon,
Won Yoochan,
Pujar Pavan,
Kim Junchul,
Lee Sunghoo,
Kim Sunkook
Publication year - 2020
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.202000014
Subject(s) - materials science , flexible electronics , polyimide , interfacing , electronic skin , photodetector , wearable computer , laser , wearable technology , conformal coating , electronics , optoelectronics , computer science , nanotechnology , computer hardware , layer (electronics) , embedded system , electrical engineering , coating , optics , physics , engineering
Wearable on‐skin electronic devices that can monitor temperature in real time are of significant interest for personalized mobile health monitoring. Here, a flexible temperature sensor directly patterned by laser‐induced carbonization on Kapton polyimide films integrated with flexible printed circuit boards is reported. The proposed sensor design possessing high resistance values exhibits high‐linear and stable response to temperatures when integrated with flexible printed circuit boards (FPCBs) to enable continuous monitoring. The anisotropic conductive film bonding technique is used to obtain the stable real‐time monitoring data under various complex environments. The sensor integration with a wearable patch based FPCB establishes conformal contacts with human skin and allows wireless sensing capabilities smoothly in real time. This kind of approach can enable multifunctional sensors to be directly laser patterned on FPCBs without any additional interfacing.