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| Performance of Polyurethane-based Composite Elastomer Cathodic Material for Anodic Bonding |
ZHAO Haocheng1( ), YAO Zhiguang2, YOU Xuerui1, ZHAO Lizhi1 |
1 Faculty of Energy Chemistry and Materials Engineering, Shanxi Institute of Energy, Jinzhong 030600, China
2 Faculty of Mechanical and Electrical Engineering, Shanxi Institute of Energy, Jinzhong 030600, China |
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Cite this article:
ZHAO Haocheng, YAO Zhiguang, YOU Xuerui, ZHAO Lizhi. Performance of Polyurethane-based Composite Elastomer Cathodic Material for Anodic Bonding. Chinese Journal of Materials Research, 2025, 39(1): 63-70.
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Abstract The application of anodic bonding, as an important technology in the semiconductor industry, in the field of flexible electronics encapsulation will be beneficial to the further popularization of the commercialization of flexible devices. The key solution is the preparation of high-performance polymer flexible substrates suitable for anodic bonding. Herein, three kinds of polyurethane-based composite elastomer cathodic materials (CPUEEs) for anodic bonding are prepared by room temperature casting, of which the microphase separation morphology can be observed by SEM. Results show that the CPUEEs present Td, 5% above 200 oC with thermal stability meets the requirements of anodic bonding, besides, the CPUEEs present amorphous structure with Tg lower than -45 oC, and their molecular segments have good low temperature flexibility, which can provide the necessary space for lithium ion migration during anodic bonding. The ionic conductivity of all samples at the bonding temperature meets the bonding requirements, and the ionic conductivity value of CPUEE3 modified by blending with PPC and SN is the highest up to 6.5 × 10-4 S·cm-1. The anodic bonding of CPUEEs and aluminum foil (Al) may be realized by heat-guided dynamic field anodic bonding technique. The bonding interface of CPUEEs-Al can be clearly observed in the SEM image, and the bonding strength of CPUEE3-Al can reach up to 1.15 MPa.
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Received: 01 April 2024
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| Fund: National Natural Science Foundation of China(22306116);Natural Science Research Project of Shanxi Province(202203021211284) |
Corresponding Authors:
ZHAO Haocheng, Tel: 18835184666, E-mail: zhaohc@sxie.edu.cn
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