Compositions and materials for electronic applications
a technology of electronic applications and compositions, applied in the field of compositions and materials, can solve problems such as performance trade-offs, and achieve the effects of improving material performance, substantially minimizing magnetic loss, and substantially maximizing material permeability
Active Publication Date: 2014-11-27
ALLUMAX TTI LLC
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Benefits of technology
The patent text describes a method of using cobalt (Co) to improve the magnetic properties of nickel-zinc ferrites, which are used in electronic applications. By replacing some of the nickel (Ni) with Co+2, and making the relaxation peaks of Co+2 and Ni / Zn overlap, the material's permeability can be maximized and magnetic loss can be minimized. The resulting materials provide superior performance for devices operating at the 13.56 MHz band. Additionally, the method also includes doping NiZn spinels with Co+2 to produce materials with permeability in excess of 10 and a favorable Q factor covering up to about 200 MHz. Overall, the patent provides a way to fine tune the magnetic properties of nickel-zinc ferrites using Co to improve their performance in electronic applications.
Problems solved by technology
However, different ions introduce different changes in material property that often result in performance trade-offs.
Method used
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Embodiment Construction
[0020]Disclosed herein are methods for fine tuning the magnetic properties of nickel zinc ferrites to improve the material performance in various electronic applications. Also disclosed herein are modified nickel zinc ferrite materials that are particularly suitable for use in various electronic devices operating at the 13.56 MHz ISM band. The modified nickel zinc ferrite material prepared according to embodiments described in the disclosure exhibits favorable magnetic properties such as increasing permeability and reducing magnetic loss.
[0021]Aspects and embodiments of the present invention are directed to improved materials for use in electronic devices. For example, these materials may be used to form an RF antenna for implantable medical devices, such as glucose sensors. These materials may also be used for other purposes, such as to form antennas for non-implantable devices, or other components of implantable or non-implantable devices. Advantageously, the materials have a comb...
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Abstract
Embodiments disclosed herein relate to using cobalt (Co) to fine tune the magnetic properties, such as permeability and magnetic loss, of nickel-zinc ferrites to improve the material performance in electronic applications. The method comprises replacing nickel (Ni) with sufficient Co+2 such that the relaxation peak associated with the Co+2 substitution and the relaxation peak associated with the nickel to zinc (Ni / Zn) ratio are into near coincidence. When the relaxation peaks overlap, the material permeability can be substantially maximized and magnetic loss substantially minimized. The resulting materials are useful and provide superior performance particularly for devices operating at the 13.56 MHz ISM band.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of assignee's U.S. application Ser. No. 13 / 241,033, filed Sep. 22, 2011, which claims the benefit of priority under 35 U.S.C. §119(e) of U.S. Provisional Application No. 61 / 385,327 filed on Sep. 22, 2010 and U.S. Provisional Application No. 61 / 418,367 filed on Nov. 30, 2010. Each of the application is incorporated herein by reference in its entirety.INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS[0002]Any and all applications for which a foreign or domestic priority claim is identified in the Application Data Sheet of the present application are hereby incorporated by reference under 37 CFR 1.57.BACKGROUND OF THE INVENTION[0003]1. Field of the Invention[0004]Embodiments of the invention relate to compositions and materials useful in electronic applications, and in particular, in radio frequency (RF) electronics.[0005]2. Description of the Related Art[0006]Various crystalline materials wit...
Claims
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IPC IPC(8): H01F1/01C01G53/00
CPCH01F1/01C01P2006/42C01G53/006C01G49/0018C04B35/265H01F1/344C01P2002/32C01P2002/54C01P2006/32C01P2006/40C04B2235/3262C04B2235/3275C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/6585C04B2235/763C04B2235/81C01G49/009C04B35/6261C04B35/62645C04B35/62655C04B35/645C04B2235/3274C04B2235/606C04B2235/656C04B2235/96H01Q1/24H01Q17/004
Inventor HILL, MICHAEL DAVIDCRUICKSHANK, DAVID BOWIEANDERSON, KELVIN M.
Owner ALLUMAX TTI LLC
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