共查询到17条相似文献,搜索用时 125 毫秒
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低温共烧陶瓷技术是近年来发展起来的一种技术。该技术已经成为无源集成中的主流实现方案。本文主要对低温共烧陶瓷技术的发展现状以及行业现状进行分析,为该行业的进一步发展提供借鉴。 相似文献
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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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耦合电感已被广泛应用于负载点电源(Point of Load,POL),以提高其稳态和动态性能。为了进一步提高系统的集成度和功率密度,耦合电感的封装集成技术近年来引起了广泛的关注。在这样的研究背景下,本文对基于低温共烧陶瓷工艺(Low Temperature Co-fired Ceramic,LTCC)的耦合电感的封装集成技术进行了研究。首先,针对低温高烧陶瓷工艺的特点,本文提出了四种不同的耦合电感结构并对它们进行了分析、仿真;其次推导出估算电感值的简单有效的数学模型,并通过仿真表明模型的准确性;然后,为了更好的测试低温共烧陶瓷耦合电感的特性,本文制作了一个超薄的易于三维集成的耦合电感样品,并给出了其电感值特性的测量结果;最后,耦合电感样品被应用于一台1MHz、12V输入、1.2V/45A输出的两相交错并联降压斩波电路中,测试其在功率电路中的性能。 相似文献
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叠层片式电感及低温烧结铁氧体的研发进展 总被引:13,自引:0,他引:13
介绍了叠层片式电感的现状及其低温共烧技术,特别就低温烧结NiCuZn、MgCuZn和Co2Z铁氧体粉料的研发进展作了详细报道.最后,展望了低温烧结铁氧体的发展趋势,指出缩小差距的研究方向. 相似文献
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低温共烧结陶瓷(LTCC):特点、应用及问题 总被引:10,自引:0,他引:10
与传统的封装技术相比,LTCC技术因其具有优良的高频特性、小线宽和低阻抗而倍受瞩目,现已迅速发展并应用于各领域。LTCC技术是将四大无源器件(电感L、电阻R、变压器T、电容C)和有源器件(晶体管、IC电路模块、功率MOS)集成在一起的混合集成技术。LTCC技术的应用可以取代目前的PCB板,使系统趋于小型化和稳定化。本文介绍LTCC技术的发展历史、研究现状、应用前景等,并着重介绍LTCC技术的分类、市场情况,也分析了LTCC技术的局限性。 相似文献
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Darko Belavic Marko Hrovat Janez Holc Marina Santo Zarnik Marija Kosec Marko Pavlin 《Journal of Electroceramics》2007,19(4):363-368
Laminated 3D structures made using low-temperature co-fired ceramic (LTCC) technology are practical for ceramic micro-electro-mechanical
systems (C-MEMS). The sensors for mechanical quantities, and/or actuators, are fundamental parts of MEMS. Thick-film resistors
can be used to sense the mechanical deformations, and thick-film piezoelectric materials can be used as electro-mechanical
transducers in a C-MEMS structure. The integration of these thick-film materials on LTCC substrates is in some cases difficult
to realise due to interactions with the rather glassy LTCC substrates. The subject of our work is an investigation of thick-film
materials for electro-mechanical transducers (sensors and actuators) and their compatibility with LTCC substrates. Resistors
made with commercial thick-film resistor materials for use as sensors on LTCC substrates have been investigated and evaluated.
Ferroelectric ceramic materials based on solid solutions of lead zirconate titanate (PZT) with low firing temperatures around
850°C were developed for thick-film technology and evaluated on LTCC substrates. 相似文献
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The paper studied the interfacial co-fired behavior between silver and Ba–Ti–B–Si–O glass–ceramics composites for LTCC application. The dielectric properties of this LTCC glass–ceramic materials were as follows: ??≈?8–10, tanδ?≤?2?×?10?3 (at 1 GHz), and its sintering temperature was lower than 900 °C. The Ag elemental distribution near the interface between glass–ceramics and Ag was investigated by scanning electronic microscopy and energy spectrum analysis. No de-lamination, camber and cracking were found between LTCC/Ag systems after firing at 810–900 °C for 2 h. The experimental results showed that the diffusion of silver was mainly decided by sintering temperature and microstructure of LTCC. Promoting densification of the LTCC can prevent Ag diffusion from co-fired interface. 相似文献
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Darko Belavič Marko Hrovat Marina Santo Zarnik Janez Holc Marija Kosec 《Journal of Electroceramics》2009,23(1):1-5
Lead zirconate titanate (PZT) is a piezoelectric material that can sense or respond to mechanical deformations and can be
used in ceramic micro-electro-mechanical systems (C-MEMS). A thick-film paste was prepared from a pre-reacted PZT powder (PbZr0.53Ti0.47O3) and thick-film technology (screen-printing and firing) was used to deposit the PZT layers on LTCC tapes and on alumina substrates.
The microstructural, electrical and piezoelectric characteristics of the thick PZT films on relatively inert alumina substrates
and on LTCC tapes were studied. Preliminary experiments indicated that due to the interaction between the printed PZT layers
and the LTCC substrates during firing the electrical characteristics deteriorate significantly. To minimise the influence
of substrate-film interactions different electrode materials and the use of additional intermediate layers as a barrier were
evaluated. The dielectric permittivities, dielectric losses, and piezoelectric coefficients (d
33) were measured. The dielectric permittivities of the thick films fired on LTCC substrates were lower (210 with gold electrodes
and 430 with silver electrodes) than those measured on alumina substrates (500). The piezoelectric coefficients d33 were measured with a Berlincourt piezometer. The d
33 values measured on the LTCC substrates were relatively low (60–80 pC/N) compared with the values obtained for the alumina substrates (around 140 pC/N). The lower dielectric constants and piezoelectric coefficients d
33 of the films on LTCC substrates are attributed to the formation of phases with a lower permittivity. This was a result of
the diffusion of SiO2 from the LTCC into the active PZT layer. The diffusion of silica was confirmed by the SEM and EDS analyses. 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