Yongjie Cui

20040180452, Sep 16, 2004

May 2, 2003

10/428686

Yongjie Cui - Evanston IL, US
Lian Li - Milwaukee WI, US

H01L021/00

438/003000, 438/931000

Films of gallium manganese nitride are grown on a substrate by molecular beam epitaxy using solid source gallium and manganese and a nitrogen plasma. Hydrogen added to the plasma provides improved uniformity to the film which may be useful in spin-based electronics.

6869806, Mar 22, 2005

Mar 14, 2003

10/468720

Yongjie Cui - Evanston IL, US
Lian Li - Milwaukee WI, US

WiSys Technology Foundation, Inc. - Madison WI

H01L021/00

438 3, 438 22, 438 34, 438 44

Films of gallium manganese nitride are grown on a substrate by molecular beam epitaxy using solid source gallium and manganese and a nitrogen plasma. Hydrogen added to the plasma provides improved uniformity to the film which may be useful in spin-based electronics.

20220416390, Dec 29, 2022

Jun 28, 2021

17/360383

- Greensboro NC, US
Yongjie Cui - Plano TX, US

H01P 1/38
H01P 5/12
H04B 1/40

A double-disc structure for self-biased circulators monolithically integrated on semiconductors is provided. A self-based circulator is attractive due to the great reduction in its size and weight compared to conventional circulators which have bulk permanent magnets. The development of miniaturized self-biased circulators enables monolithic integration of such circulators directly into monolithic integrated circuits (e.g., monolithic microwave integrated circuits (MMICs)) on a single chip and opens the door to full-duplex communication in radio frequency (RF) bands higher than Ka band, without suffering from the additional losses through connectors. This disclosure demonstrates a new double-disc structure by using two self-biased discs in a circulator device, which greatly improve its insertion loss, isolation, bandwidth, and power handling capability.

20200287262, Sep 10, 2020

May 30, 2019

16/427143

- Greensboro NC, US
Yongjie Cui - Plano TX, US
Subrahmanyam V. Pilla - Plano TX, US

H01P 1/387
H01P 11/00
H01L 23/66
H01L 21/82
H01L 21/8252

A method for manufacturing a self-biased circulator includes cooling a nanocomposite material to a magnetization temperature below 200 K, applying an external magnetic field to the nanocomposite material to form a magnetic nanocomposite material, providing the magnetic nanocomposite material in a semiconductor substrate, and providing one or more metal layers over the magnetic nanocomposite material to form a circulator. By cooling and then magnetizing the nanocomposite material, a performance of the circulator may be significantly improved.

20180240963, Aug 23, 2018

Feb 21, 2018

15/901142

- Greensboro NC, US
Xing Gu - Allen TX, US
Yongjie Cui - Plano TX, US
Xing Chen - Plainfield IL, US

H01L 43/02
H01P 1/38
H01P 1/36
H01F 1/01
H04B 7/02

A passive magnetic device (PMD) has a base electrode, a multi-port signal structure (MPSS), and a substrate therebetween. The MPSS has a central plate residing in a second plane and at least two port tabs spaced apart from one another and extending from the central plate. The substrate has a central portion that defines a mesh structure between the base electrode and the central plate of the multi-port signal structure. A plurality of magnetic pillars are provided within the mesh structure, wherein each of the plurality of the magnetic pillars are spaced apart from one another and surrounded by a corresponding portion of the mesh structure. The PMD may provide a magnetically self-biased device that may be used as a radio frequency (RF) circulator, an RF isolator, and the like.