Printed electronics is an alternative manufacturing paradigm for low-cost and large-area microelectronic devices and systems. Metal nanoparticle (MNP) inks are favorable to print conductors due to their high electrical conductivity. As-printed MNP ink requires sintering to become electrically conductive. High-quality MNP conductors require monitoring and optimization of the sintering process. Traditionally, electrical conductivity is measured to monitor the different sintering stages. This requires destructive probing or fabrication of dedicated test structures, which is challenging for in-line monitoring of high-volume manufacturing. Here, we demonstrate that frequency-domain thermoreflectance (FDTR), an optical pump-probe technique, can be used for process monitoring. Conductive features are inkjet printed with a silver nanoparticle ink. Intense pulsed light (IPL) sintering is used rather than traditional thermal sintering due to its capability of millisecond sintering. Therma...

中文翻译：

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频域热反射法对印刷电子产品进行高速非接触烧结表征

印刷电子产品是低成本和大面积微电子设备和系统的替代制造范例。金属纳米颗粒（MNP）墨水由于其高电导率而非常适合打印导体。印刷的MNP油墨需要烧结才能导电。高质量的MNP导体需要监控和优化烧结过程。传统上，要测量电导率以监控不同的烧结阶段。这需要破坏性的探测或专用测试结构的制造，这对于大批量生产的在线监控具有挑战性。在这里，我们证明了频域热反射（FDTR），一种光学泵浦探针技术，可以用于过程监控。导电特征是用银纳米粒子墨水进行喷墨印刷的。由于其毫秒级烧结能力，因此使用了强脉冲光（IPL）烧结，而不是传统的热烧结。瑟玛...