共查询到17条相似文献,搜索用时 421 毫秒
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LTCC铁氧体叠层片式器件及材料的国内外发展动态 总被引:3,自引:0,他引:3
根据最近(2008.10.10)举行的第十届国际磁铁氧体会议(ICF10)和第十三届全国磁学会议(2008.10.31)资料,以及近两年有关专业会议文献,综合介绍了近期国内外制作叠层片式电感、滤波器和变压器的LTCF(低温共烧铁氧体)工艺、低温烧结NiCuZn、MnZn、Co_2Z、Co_2Y、BaM等铁氧体技术以及LTCC(低温共烧陶瓷)叠层片式电感的研发进展,展望了LTCC和叠层片式电感的发展趋势. 相似文献
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采用氧化物陶瓷工艺制备低温共烧铁氧体(LTCF)多层片式器件用NiCuZn铁氧体材料,研究了V_2O_5掺杂对材料微观结构、磁导率及其温度特性的影响。结果表明,随V_2O_5掺杂量的增加,样品平均晶粒尺寸增大,材料烧结温度降低,磁导率先增大后降低;宽温NiCuZn铁氧体配方采用0.4wt%的V_2O_5掺杂,可使材料实现低温烧成(烧结温度900℃左右),并具有高磁导率(500左右)、致密的细晶粒显微结构,从而获得满足LTCF多层片式铁氧体器件高、低温应用环境(-55~+85℃)下磁性能要求的低温烧结NiCuZn铁氧体宽温材料。 相似文献
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基于LTCC/LTCF复合集成技术,对包含DC-DC电源变换电路的YIG调谐数字激励器进行集成化设计。电路基板由LTCC和LTCF两种材料复合层叠而成。通过Maxwell 3D软件进行仿真设计,利用LTCF材料的磁特性,在基板内集成了DC-DC电源所需的电感器,取代了高度较高的表贴式电感。将电感仿真结果导入Durst Graffy软件,与其它电路元件一起进行布局布线,实现了YIG激励器的平面化设计。最后,通过多次烧结工艺试验,成功实现了YIG激励器电路基板样品的制作。预计组装完成后,激励器高度将缩减到约原先PCB电路的44%。 相似文献
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H. Naghib zadeh G. Oder J. Hesse T. Reimann J. Töpfer T. Rabe 《Journal of Electroceramics》2016,37(1-4):100-109
low-κ dielectric LTCC was developed, to realize successful co-firing with NiCuZn ferrite tapes. A critical high-temperature process in the production of highly integrated LTCC modules is the migration of silver from inner conductors into the LTCC glass phase. Intensive silver migration causes strong deformation of LTCC multilayers during firing in air. Silver migration into the LTCC glass phase depends on oxygen content of the sintering atmosphere and can be minimized by sintering in nitrogen atmosphere. However, partial decomposition of NiCuZn-ferrite and formation of cuprite was observed during sintering in nitrogen and, consequently, the permeability of the ferrite decreases. As shown by a combined XRD/thermogravimetric study the co-firing of LTCC modules with silver metallization and integrated ferrite layer demands precise adjustment of oxygen partial pressure. 相似文献
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Ik Hyun Han Young Hyun Lee Seong Jae Myoung Myoung Pyo Chun Jeong Ho Cho Byung Ik Kim Duck Kyun Choi 《Journal of Electroceramics》2009,23(2-4):559-563
When make multi-layer ceramics device such as EMI filter, there are a lot of process problems. Specially, crack, camber and delamination should be controlled surely by different sinter shrinkage rate of interface of two materials. The purpose of this work was to co-fire defect-free ferrite/varistor ceramic multi-layers fabricated via a calcination temperature and organic vehicle contents of ferrite. Sintering shrinkage of both calcined ferrite and varistor materials were measured using dilatometer. X-ray diffraction analysis indicated that no significant phase change occurred in the materials under investigation as a result of the sintering process. Crack and delamination of each interface were observed by scanning electron microscopy and optical microscope. We obtained the defect-free and co-fired ferrite/varistor ceramic multi-layer by controlling calcinations temperature. 相似文献
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随着通讯技术的发展,阵列天线的应用导致环行器的需求量迅猛增加。为适应微波组件集成化的批量生产工艺要求,急需解决环行器表面贴装技术难题。环行器实现表贴结构形式,通常有三种工艺途径,即低温共烧(LTCF)、MENS和多层印制电路板(PCB)叠片工艺。阐述了8 mm多层PCB结构表贴式环行器的设计。采用带状线环行器的设计方案,电路制作在印制电路板上,利用多层PCB工艺进行制作。为了形成一体化,电路两面用金属化过孔连接。信号通过金属化过孔引到底面与端口线连接,形成表贴结构。通过仿真优化,在27~30 GHz的频率范围内,器件的损耗小于0.83 d B,隔离度大于15.5 d B,输入端口电压驻波比小于1.63。 相似文献
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