Preparation and High-frequency Application of Low-temperature-curing Silver Paste
| Autor: | Hong-ching Lin, 林鴻欽 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 In this study, at first, focus on the effect of silver oxalate addition on physical characteristics of metallo-organic-decomposition (MOD) silver screen-printable paste for thick film technology. The addition of silver oxalate in the paste not only produces fresh fine silver particles after curing, but also reduces the decomposition temperature of the lubricant coated on the silver flakes. This is an effective route to provide fine silver particles to the paste without significantly changing the rheological behavior. Then, the next study focus on paste formulations containing silver oxide coated with MOD (metallo-organic decomposition) agent of silver stearate were prepared without the use of any silver powders or silver flakes. The lowest electrical resistivity of 13.2x10-6 ��-cm was obtained for the film prepared from paste with the Ag2O/silver stearate ratio of 100:5 at a solid loading of 80wt% in solvent α-terpineol, after being cured at 160�aC for 5min, which meets the requirements of low-temperature and high speed manufacturing for practical applications. Co-existence of the Ag2O and silver stearate induces their simultaneous transformation to the silver form at temperatures below 160�aC. The electrical properties of silver films, prepared using a low-curing-temperature metallo-organic-decomposition (MOD) paste and a high-temperature silver paste screen-printed on polished and nonpolished alumina substrates, at microwave frequency were characterized in this study. At last, to evaluate RF electrical properties between low-temperature-curing and high-temperature silver paste, multilayered structure and the low-temperature co-fired ceramic technology are employed to design and fabricate the filter. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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