Robert C Burr

US Patent:

61007870, Aug 8, 2000

Filed:

May 28, 1997

Appl. No.:

8/864300

Inventors:

Rong-Fong Huang - Albuquerque NM
Robert A. Burr - Albuquerque NM

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01C 718

US Classification:

338204

Abstract:

A multilayer electronic component (200) is provided. The component includes a substrate package assembly (202) with a set of stacked insulated sheets of a dielectric ceramic material (204, 206, 208, 210, 212). Also included are a set of embedded resistors (214), each of the embedded resistors including an electrical input port pad (216) and an electrical output port pad (218) provided in layers between the set of stacked insulated sheets. Each of the insulated sheets has a trough (220) of a predetermined length aligned between and transverse to the electrical input port pad (216) and the electrical output port pad (218). The trough (220) reduces the resistance value variability in the multilayer electronic component (200). The trough (220) is substantially filled with a resistive paste material and an internal circuit (222) connects the embedded resistors inside the substrate package assembly (202). A method of forming the substrate package assembly (202) is also provided.

US Patent:

58382151, Nov 17, 1998

Filed:

Feb 5, 1996

Appl. No.:

8/598830

Inventors:

Wang-Chang Albert Gu - Coral Springs FL
E. S. Ramakrishnan - Coral Springs FL
Robert A. Burr - Albuquerque NM
Adam D. Moya - Peralta NM

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01F 2724

US Classification:

333181

Abstract:

A radio frequency (RF) choke inductor (102, 500, 600) includes a magnetic core (502, 602) which substantially dissipates RF and microwave signals. The magnetic core (502, 602) is sufficiently lossy to provide a substantially resistive impedance at RF and microwave frequencies. The magnetic core is formed by providing a homogeneous ferrite composition characterized by a mixture of ferrous ions and ferric ions (404), and then sintering the homogeneous ferrite composition in an inert gas atmosphere (412) to provide a rapid electron exchange reaction. A conductive wire is then wound about the magnetic core (414) to complete the choke inductor.