[Todos] Seminario CAC Lunes 5 de noviembre Materia Condensada

[Laura Steren]

ANUNCIO SEMINARIO

Lunes 5 de noviembre, 11 hs
Auditorio Ema Perez Ferreira, Edificio Tandar, CNEA


*Soft Magnetic Thin Film Applications at Radio Frequencies
*
 Masahiro Yamaguchi
 Department of Electrical Engineering
 Graduate School of Engineering
 & New Industry Creation Hachery Center(NICHe)
 Tohoku University, Sendai 980-8579, Japan

 2012 IEEE Magnetics Society Distinguished Lecturer


Development of new passive component technologies will enable a
“More-than-Moore� paradigm leading to innovative application-specific
compact systems [1]. Ferromagnetic thin film materials, having high
permeability at (and above) radio frequencies, are candidate materials for
use in inductive passive components that are available in the forms of
vacuum-deposited and electro-deposited metallic alloys, chemically
synthesized nano-particulate composites, and traditional oxides, among
others. Using these materials, the development of CMOS integrated inductors
and integrated electromagnetic noise suppressors for Long Term Evolution,
or 3.9th  Generation, cell phone RFIC and Point-of-Load one-chip DC-DC
converters, is attracting great interest from both academic and industrial
communities.
This lecture begins with a review of new soft magnetic thin film
applications at radio frequencies for future system-in-package (SiP) and
system-on-chip (SoC) technologies. Proposed in late 1970s, these thin film
soft magnet applications have evolved from inductive read/write recording
head technology to the frontiers of GHz frequency device applications.
Discussions covered in this lecture include:  (1) Development of
international cross measurements of RF permeameters [2] to evaluate RF
permeability and related FMR profiles of magnetic films; (2) small signal
high permeable low loss applications to CMOS integrated inductors [3]; (3)
small signal lossy application to CMOS integrated electromagnetic noise
suppressor [4]; (4) small to medium signal applications as new
metal/ferromagnetic multi-stack “conductors� to suppress skin effect
utilizing negative permeability beyond the FMR frequency [μr’< 0,
μr�≈0][5]; and, (5) large current permeable application to Point-of-Load
type one-chip DC-DC converters. The lecture will conclude with an outlook
that provides a perspective on the future of on-chip RF magnetics.

[1] John P. Kent, and Jagdish Prasad, “Microelectronics for the Real World:
‘Moore’ versus ‘More than Moore’,� IEEE 2008 Custom Integrated Circuits
Conference, 15-4-1 (2008).
[2] M. Yamaguchi, Y. Miyazawa, K. Kaminishi and K.I. Arai, “A New 1 MHz-9
GHz Thin-Film Permeameter Using a Side-Open TEM Cell and a Planar
Shielded-Loop Coil,� Trans. Magnetic Society of Japan, 3, 137-140 (2003).
[3] Masahiro Yamaguchi, Keiju Yamada, Ki Hyeon Kim, "Slit Design
Consideration on the Ferromagnetic RF Integrated Inductor," IEEE
Transactions on Magnetics, 42, 3341-3343 (2006)
[4] Sho Muroga, Yasushi Endo, Wataru Kodate, Yoshiaki Sasaki, Kumpei
Yoshikawa, Yuta Sasaki, Makoto Nagata Masahiro Yamaguchi, “Evaluation of
Thin Film Noise Suppressor Applied to Noise Emulator Chip Implemented in
65nm CMOS technology,� IEEE Transaction on Magnetics, 48, 4485 - 4488
(2011).
[5]  Masahiro Yamaguchi, Yutaka Shimada, Takayoshi Inagaki and Behzad
Rejaei, “Skin Effect Suppression in RF Devices Using a Multilayer of
Conductor and Ferromagnetic Thin Film with Negative Permeability,�
Microwave Workshop and Exhibition 2008 (MWE 2008), WS08-03 (Yokohama, 2008).
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