Embedded Planar Power Inductor in an Organic Interposer for Package-Level DC Power Grid

Yazaki, Yoshihiko; Ishidate, Kazuma; Hagita, K.; Kondo, Y.; Hattori, Saki; Sonehara, Makoto; Sato, Toshiro; Watanabe, Toshiya; Seino, Yuto; Matsushita, Nobuhiro

doi:10.1109/tmag.2014.2327965

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…The Q-factor must be over 57 in order to obtain conversion efficiency over 90%. Although it is not so easy to realize such a high Q-factor, by using the closed magnetic circuit consisting of the Zn-Fe ferrite core and the Carbonyl-Fe/Epoxy composite core, the Q-factor close to 20 can be obtained 6) .…”

Section: Discussionmentioning

confidence: 99%

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CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor

et al. 2015

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To achieve a package-level DC power grid for the next-generation power delivery to LSIs, multiple point-of-load (POL) buck DC-DC converters must be integrated into the package. We developed a 180 nm CMOS switch DC-DC buck converter for the POL DC power supply using a Zn-Fe ferrite core planar inductor embedded in an organic interposer. The embedded inductor had a 25 m thick copper spiral coil sandwiched by 10 m thick Zn-Fe ferrite thick film fabricated using the spin-spray method, which exhibited an inductance of 4.6 nH and a Q-factor of 11 at 50 MHz. A 180 nm CMOS switch was mounted using a flip-chip scheme on the organic interposer with the embedded inductor. The developed 50 MHz switching CMOS switch buck DC-DC converter exhibited a power conversion efficiency of about 68% when the input voltage was 2 V, the on-duty ratio was 0.5, the output voltage was 0.855 V, and the current was 1 A.

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Section: Discussionmentioning

confidence: 99%

“…2.3 Zn-Fe ferrite core inductor By using the embedded inductor technology 6) , the Zn-Fe ferrite magnetic core inductor has been embedded in the organic interposer with an 800 m thick epoxy/glass-fiber center core and 80 m thick epoxy/glass-filler build-up layers.…”

Section: Zn-fe Ferrite Thick Film Deposited On Polyimide Under-layermentioning

confidence: 99%

CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor

et al. 2015

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“…General simulation software packages include MATLAB and PSCAD/EMTDC [97,98]; however, the models, operating conditions, and control modes used by these software packages still need to be further developed and improved. According to the bus bar configuration and the structure of the rectifier, the topology of a DC network can be divided into the Onboard DC Grid technology, BlueDrive PlusC technology, and E-PP technology [99][100][101]. Among them, the Onboard DC Grid technology adopts a DC bus-distributed configuration scheme, the rectifier adopts the thyristor structure, and the system integration is not sufficiently robust.…”

Section: Tablementioning

confidence: 99%

A review of multi-energy hybrid power system for ships

Yuan

Wang

Yan

et al. 2020

Renewable and Sustainable Energy Reviews

137

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“…The most common planar inductor design is the single-coil design, where the windings of the inductor consist of a single planar coil [12][13][14]. Alternatively, the double-coil inductor consists of a winding which is partitioned in two sub-coils.…”

Section: Introductionmentioning

confidence: 99%

Application of ferrite layers in low‐profile OLED drivers

Kundrata

Barić

2018

IET Power Electronics

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Driver of a low-profile organic light-emitting diode (OLED) luminary due to space constraints uses a planar inductor with ferrite layers to realise desired inductive properties. This study presents the analysis of usage of ferrite layers with singlecoil and double-coil windings in the OLED driver. The model based on magnetic circuits is used to analyse the inductance and the quality factor. The influence of the winding dimensions and the ferrite layers is analysed. The analysis is verified by electromagnetic simulations and measurements. The results of vector network analyser measurements show that the doublecoil design has the maximum inductance ∼80% and maximum quality factor ∼10% larger than the single-coil design. The measurements of the planar inductors in the OLED driver show that the best-case single-coil and double-coil inductors have a similar efficiency, but the double-coil inductor has a 35% smaller current ripple which leads to better EMC performance of the driver. It is concluded that it is sufficient that the ferrite layer covers the inductor, i.e. it does not have to be much larger than the inductor to achieve good performance.

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Embedded Planar Power Inductor in an Organic Interposer for Package-Level DC Power Grid

Cited by 9 publications

References 7 publications

CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor

CMOS Switch Buck DC-DC Converter Fabricated in Organic Interposer with Embedded Zn-Fe Ferrite Core Inductor

A review of multi-energy hybrid power system for ships

Application of ferrite layers in low‐profile OLED drivers

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