IEEE Magnetics Society Santa Clara Valley Chapter

The objective of the Santa Clara Valley Chapter of the IEEE Magnetics Society is to sponsor local seminars and publicize conferences, workshops and other information of interest to the Society's local members and technical people in the area of applied magnetics.

Upcoming Meetings:   May June September [ Click here for a PDF version of this announcement ] [ Click here for abstracts of past meetings: | 2006 | 2007 | 2008 | ( 200K )  ] [ Chapter officers and contacts - click here ]

 

IEEE and IDEMA links:
IEEE Magnetics Society	[ Bay Area e-GRID ]	[ Santa Clara Valley Section ]

[ San Francisco Section ]	[Oakland / East Bay Section]	[ IDEMA ]	[ Magnetic Disk Heritage Center ]

 

 

Tuesday, May 27th, 2008  Western Digital, 1710 Automation Parkway, San Jose,CA Directions and Map Cookies & Conversation at 7:30 p.m.  Presentation at 8:00 p.m. Spintronic Biochips for Biomolecular Recognition Prof. Paulo P. Freitas INESC MN and Phys. Dept, Inst. Superior Tecnico, Lisbon, Portugal   Abstract Integrated spintronic biochip platforms are being developed for portable, point-of-care diagnostic applications. The platforms consist of a microfluidic unit where the bioassay takes place, an arraying and detector chip consisting of target arraying current lines and integrated magnetoresistive sensors, and electronic control and readout boards. Probe biomolecules are immobilized by microspotting over sensor sites, and target biomolecules, labeled with magnetic nanoparticles are arrayed over the probe sites (magnetically assisted hybridization). After proper washing, hybridized targets are recognized by the fringe fields created by the magnetic beads, (and) detected by the incorporated magnetoresistive sensors. Detecting geometries will be reviewed, using either out-of-plane or in-plane bead excitation, and dc or ac detection/excitation. Detection limits using spin valve and tunnel junction sensors will be presented, depending ultimately on platform electronic noise, and sensor noise characteristics. Applications to gene expression chips (Cystic Fibrosis gene mutation detection) and imuno assay chips ( anti-body-antigen recognition, E-coli, Salmonella detection) will be presented. Spintronic biochip are also being integrated into multi-module lab-on-chip platforms including biomolecule extraction from biological fluids (magnetophoresis), PCR modules (if required), and the biomolecular recognition module. Alternative spintronic biochip geometries will also be presented (lateral flow biosensors), where a magnetoresistive reader scans the surface of a porous strip, where labeled target biomolecules bind to immobilized probes. Finally, a brief review of other biomedical applications of magnetoresistive sensors will be given, from hybrid sensors targeted at biomedical imaging, to magnetic tweezers/sensors for DNA translocation monitoring.

Biography Paulo P. Freitas Paulo Freitas is a Full Professor of Physics at the Instituto Superior Tecnico (IST) in Lisbon, and the Director of INESC Microsystems and Nanotechnologies. Current research topics include MRAMS, read heads for ultra high density recording, magnetoresistive biochips, and sensors for biomedical applications. He has been involved in research in the area of magnetoresistive materials and devices since he received his Ph.D in Solid State Physics from Carnegie Mellon University in 1986. His PhD thesis was on the subject of anisotropic magnetoresistance of ferromagnetic thin films and alloys. He then joined IBM Research at Yorktown Heights as a post doctoral fellow working on high-TC superconductivity and transport properties of ferromagnetic thin films. In 1988 he joined INESC in Lisbon, where he started the Solid State Technology Group. In 1989 he became Professor of Physics at the Instituto Superior Tecnico in Lisbon. From 1992 to 1996, he was responsible for the start up and operation of INESC´s ASIC back-end of the line microfabrication facility. From 1996 till now, his research areas expanded to magnetoresistive read elements for magnetic data storage, magnetoresistive sensors, MRAMS, and biomedical applications including magnetoresistive biochips. He became director of INESC Microsystems and Nanotechnologies in 2001, and Full Professor of Physics at IST in 2002. Over this period, he co-authored over 200 technical papers and several chapter books. Professional activities include membership in IEEE, participation in several Publication/Program/Advisory Committees of MMM and Intermag Conferences. Contact: Paulo Freitas, Physics Department, Instituto Superior Tecnico, Lisbon, Portugal. e-mail: pfreitas@inesc-mn.pt

 

 

Tuesday, June 10th, 2008  Western Digital, 1710 Automation Parkway, San Jose,CA Directions and Map Cookies & Conversation at 7:30 p.m.  Presentation at 8:00 p.m. Integrated On-Chip Inductors Using Magnetic Material Don Gardner Intel Corporation Abstract On-chip inductors with magnetic material are integrated into both advanced 130 nm and 90 nm CMOS processes. The inductors use copper metallization and amorphous CoZrTa magnetic material. Increases in inductance of up to 28× were obtained, significantly greater than prior values for on-chip inductors. With such improvements, the effects of eddy currents, skin effect, and proximity effect become clearly visible at higher frequencies. The CoZrTa was chosen for its good combination of high permeability, good high-temperature stability (>250°C), high saturation magnetization, low magnetostriction, high resistivity, minimal hysteretic loss, and compatibility with silicon technology. The CoZrTa alloy can operate at frequencies up to 9.8 GHz, but tradeoffs exists between frequency, inductance, and quality factor. The effects of increasing the magnetic film thickness on the permeability spectra were measured and modeled. The inductors use magnetic vias and elongated structures to take advantage of the uniaxial magnetic anisotropy. Techniques are presented to extract and examine the effects of magnetic vias on the inductor structures. The inductors with thick copper and thicker magnetic films have inductance densities of up to 1.3 μH/mm², resistances as low as 0.04 W, and quality factors of 8 at 50 MHz.

Biography Don Gardner Don Gardner has been with Intel Corporation since 1991 and is currently a principal engineer in Intel Research and a visiting scientist at Stanford University. Don received his PhD in Electrical Engineering from Stanford University. He has had appointments as a visiting research scientist at Hitachi Research Labs in Japan and as an instructor at Stanford University. He is the inventor or co-inventor of 56 patents including for inductors using high-frequency magnetic materials, Al-Ti layered metal for interconnections, reflow of copper metal, and embedded ground planes. Don has published and/or presented over 200 electrical engineering, materials science and computer science papers. He has received 3 Best Paper and Poster awards at international conferences and his paper on inductors was judged the best at the IEEE IITC conference. He enjoys bringing new life to old technologies by blending them with different technologies or recent science and new materials. His current interests include magnetic materials for high-frequency inductors, nanostructure design and devices, silicon-based optoelectronic devices, and new process technology. Contact: d.s.gardner@intel.com

 

 

Tuesday, September 9th, 2008  Western Digital, 1710 Automation Parkway, San Jose,CA Directions and Map Cookies & Conversation at 7:30 p.m.  Presentation at 8:00 p.m. A BRIEF HISTORY OF MAGNETIC TAPE RECORDING AT AMPEX - 1944 to 1962 by John M. Leslie and Jay McKnight Abstract This talk covers the History of Magnetic tape recording at Ampex Corporation from its inception in 1944 to 1962. It includes highlights of: (1) what led a small motor manufacturer to become a major producer of magnetic tape recorders and an industry leader for decades; (2) development of the Ampex 200A; (3) the Model 300, which became the backbone of both the audio and data recording industries; (4) the Model 350 which became the workhorse of many radio and recording studios; (5) multi-channel recorders for widescreen theater productions; and (6) development of the Ampex VR-1000 videotape recorder that revolutionized the television broadcast industry. The paper also includes comments on the equalization characteristics used in Ampex’s audio and data recorders. It closes with a look back at events that slowed the momentum of the "glory years" of Ampex.

Biography John M. Leslie  Born 1921, in Springfield, MO.  BSEE (‘49, Berkeley)  MSME (‘63, Stanford)  EME (‘65, Stanford) Military 1942-46   U.S. Navy Ampex Corp. 1948-62   Rising from Subcontractor   to Vice President and General Manager Stanford Univ. 1963-65   Associate Professor (acting)   in Mechanical Engineering Hewlett Packard 1966-69   Manager of Engineering Pemtek Corp. 1970-76   Part owner and Vice President of Engineering United Scientific Corp 1976-81   Senior Vice President of Engineering,   President of Analytical Instruments Tracor Xray 1981-84   Vice President and General Manager Retirement     Wonderful time with our    5 children, their spouses, 13 grandchildren Contact: johnmleslie@msn.com

Biography John G. (Jay) McKnight  Born 1931 in Seattle, Washington  BS in Elec. Eng. from Stanford University in 1952 Ampex Corp 1952-72   Served in the magnetic recording research group,   stereo tape and professional audio division Magnetic Reference Lab.   Co-founder (1973), president since 1975. Mr. McKnight has published over 60 papers on the theory and practice of magnetic recording, and audio engineering (see bibliography at http://home.flash.net/%7Emrltapes/jmbibsub.pdf).  In 1973/74 he was a member of Judge Sirica's "Advisory Panel on White House Tapes" ('The Watergate Tapes').   Mr. McKnight has been very actively serving the Audio Engineering Society (AES): He is Fellow, President (1978/79), Honorary Member (1979), member of the AES Journal Review Board (1960 - 2007), Governor 4 times, Standards Committee Chairman (1971 - 74), Publications Policy Committee Chairman (1977/78), Historical Committee Chairman (1999 - 2006), and now Chair Emeritus of that Committee.  He has been a member of several standards committees on audio engineering and magnetic recording.  He received the AES’s Publication Award (1982), AES Award (1971), Board of Governors Award (1990) and the AES Distinguished Service Medal Award (10/2008) for extraordinary service to the Society and contributions to the advancement of knowledge in magnetic recording over a period of more than 50 years.  He is IEEE senior member, IEEE Magnetics Society member, "IRE (IEEE) Professional Group on Audio" member (1953 - 70). Contact: jaymck@flash.net

IEEE Santa Clara Valley Magnetics Section: Officers for 2008