ott.ua.edu

1. UAIPD 14-0052
Dr. Yang-Ki Hong
High Q Factor Integrated Magnetic
Inductors

2. Current Problems
• Single phase ferromagnetic materials and air-core
magnetic inductors
• Conventional magnetic inductors suffer from
magnetic loss of the magnetic materials used in
inductors
– Causes decrease in Q factor
• Difficulty in achieving high permeability and
ferromagnetic resonance frequency
– Soft phase has higher saturation magnetization
– Smaller magnetic anisotropy field than hard phase

3. • Integrated magnetic inductor for radio frequency devices
• Inductor coils, magnetic films, a substrate, and exchange-
coupled magnetic material
– In the form of a composite or film
• Exchange-coupled two-phase hard and soft magnetic
composites
– High magnetization of soft phase
– Large coercivity of the hard phase
• Control of the volume fraction of the hard/soft phase
Technology

4. • Minimized the effect of magnetic loss of the
magnetic materials on the inductors electrical
characteristics
• Improved dynamic properties of exchange-coupled
magnetic materials
• Increase of over 20% in the L and Q factors
• Improved permeability and fFMR at the frequency of
interest
• Uses glass substrate
– Cheaper material
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 14-0052
OTT@UA.edu
www.OTT.UA.edu