织物基UHF-RFID标签天线的制备及封装工艺初探

以常见的服装水洗唛为基材,采用丝网印刷方式印制超高频射频识别(ultra high frequency-radio frequency identification,UHF-RFID)标签天线,并与芯片连接封装制备标签,探讨丝网印刷天线的网板目数、不同类型导电油墨和天线/芯片连接封装的热压温度对印刷质量和标签读取性能的影响。试验结果表明:网版目数为300目的标签天线的印刷精度和尺寸稳定性优于350目的丝印网版;当采用8000A型导电银浆时,标签性能满足读取要求,读取距离在8 m以上;为保证标签天线与芯片形成稳定的电连接,从而使所制备的标签读取距离及外观性能最佳,连接封装时热压温度应与天线印刷固化温度一致。

Preliminary Study on Preparation and Packaging Technology of Fabric-Based Screen UHF-RFID Tag Antenna

The UHF-RFID(ultra high frequency-radio frequency identification)tag antenna was prepared with washing-mark fabric as printing substrate and printed by screen printing method.Then it was connected to the chip.The influence of screen mesh,composition of conductive ink as well as the hot pressing temperature in antenna-chip assemble process on printing quality and reading performance of the tag were discussed.The experimental results show that the antenna geometry printed by silk screen with 300 mesh is more accurate and stable in dimension than that with 350 mesh screen.As to reading performance of the tag,the 8000A conductive ink can reach the requirement and the reading distance is more than 8 m.To ensure the stable electrical connection between tag and chip,and to obtain good printing performance and outlook of tag,the hot pressing temperature during assembling should be consistent with that during heat curing conductive ink.