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UAIPD 15-0011
Dr. Yang-Ki Hong
GHz Magnetic Chip Inductor with High Magnetic
Loss
Current Problems
• Surface-mounted devices (SMD) type inductors
– Magnetic core inductors
• Limited to low frequencies (<100 megahertz)
– Non-magnetic ceramic core
• Small inductance density
• Low self-resonant frequency (SRF) : when a “short” occurs
• Parasitic capacitance: unwanted capacitance
• Magnetic loss of core material is a barrier to the
development of GHz magnetic chip inductors
• GHz magnetic chip inductor
– Air and magnetic-core materials
• Center magnetic bar
– Surrounded by coils, top/bottom magnetic slabs, and an air-core
inside the enclosed magnetic wall
• Location of air-core between the magnetic core and inductor
coil
– Key parameter for high performance GHz magnetic chip inductor
Technology
• Realized simultaneously high L, Q factor and SFR
– Due to negligible core loss
• Increase in inductance
– Due to the magnetic core possessing a high magnetic
permeability
• Outperforms conventional air- and magnetic-core
inductors
– Combination of both air- and magnetic-core materials
Advantages
• Dr. Yang-Ki Hong
– E.A. Larry Drummond Endowed
Chair of Computer Engineering
– Professor of Material Sciences Ph. D.
Program
– More than 100 referred journal papers
– 13 patents awarded
– 8 provisional US patents
• Departments
– Center for Materials for Information
Technologies
– Electrical and Computer Engineering
Inventor
ykhong@eng.ua.edu
Office for Technology Transfer
720 2nd Ct E
Tuscaloosa, AL 35401
UAIPD 15-0011
OTT@UA.edu
www.OTT.UA.edu

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UAIPD 15-0011

  • 1. UAIPD 15-0011 Dr. Yang-Ki Hong GHz Magnetic Chip Inductor with High Magnetic Loss
  • 2. Current Problems • Surface-mounted devices (SMD) type inductors – Magnetic core inductors • Limited to low frequencies (<100 megahertz) – Non-magnetic ceramic core • Small inductance density • Low self-resonant frequency (SRF) : when a “short” occurs • Parasitic capacitance: unwanted capacitance • Magnetic loss of core material is a barrier to the development of GHz magnetic chip inductors
  • 3. • GHz magnetic chip inductor – Air and magnetic-core materials • Center magnetic bar – Surrounded by coils, top/bottom magnetic slabs, and an air-core inside the enclosed magnetic wall • Location of air-core between the magnetic core and inductor coil – Key parameter for high performance GHz magnetic chip inductor Technology
  • 4. • Realized simultaneously high L, Q factor and SFR – Due to negligible core loss • Increase in inductance – Due to the magnetic core possessing a high magnetic permeability • Outperforms conventional air- and magnetic-core inductors – Combination of both air- and magnetic-core materials Advantages
  • 5. • Dr. Yang-Ki Hong – E.A. Larry Drummond Endowed Chair of Computer Engineering – Professor of Material Sciences Ph. D. Program – More than 100 referred journal papers – 13 patents awarded – 8 provisional US patents • Departments – Center for Materials for Information Technologies – Electrical and Computer Engineering Inventor ykhong@eng.ua.edu
  • 6. Office for Technology Transfer 720 2nd Ct E Tuscaloosa, AL 35401 UAIPD 15-0011 OTT@UA.edu www.OTT.UA.edu

Editor's Notes

  1. Should read like Wikipedia entry. Try to focus on the high points.
  2. Closing slide. Make sure to add in UAIPD# then change font back to black.