Jorge Pereira, Inês S. Garcia, Gabriel Ribeiro, José Fernandes, Filipe S. Alves, Marco Martins, André Cardoso, Rosana A. Dias
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引用次数: 0
摘要
:智能 NFC 标签有许多有趣的应用，并能从进一步微型化中受益。我们展示了一款直径为 5.1 毫米的无源温度感应标签，它由一个薄膜微加工天线和一个 NFC 芯片组成。微天线/线圈由嵌入 SU-8 的两个 15 µ m 厚的电镀铜层组成，可承受 BGA NFC IC 的焊接工艺。微天线设计面临的挑战是如何在微型化的同时最大限度地减少性能损害（电感耦合距离），而微加工过程则非常依赖于地形传播。制作的线圈成功地进行了表征（2.32 µ H 电感；13.76 MHz 自谐振），并用手机在最远 7 mm 的距离读取了温度（组装后）。
: Smart NFC tags are seeing many interesting applications and can benefit from further miniaturization. A passive temperature sensing tag with 5.1 mm diameter is demonstrated, comprising a thin-film microfabricated antenna and an NFC chip. The microantenna/coil comprises two 15 µ m-thick electroplated copper layers embedded in SU-8, withstanding the soldering process of a BGA NFC IC. The µ -antenna design challenge is to miniaturize while minimizing performance impairment (inductive-coupling distance), while the micromachining process is very dependent on topography propagation. Fabricated coils were successfully characterized (2.32 µ H inductance; 13.76 MHz self-resonance) and temperature was read (after assembly) with a mobile phone at distances of up to 7 mm.
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