Debra C Fleming

US Patent:

58027025, Sep 8, 1998

Filed:

Sep 4, 1997

Appl. No.:

8/923591

Inventors:

Debra Anne Fleming - Lake Hiawatha NJ
David Wilfred Johnson - Bedminster NJ
Vincent George Lambrecht - Millington NJ
Henry Hon Law - Berkeley Heights NJ
David Joseph Liptack - Hoboken NJ
Apurba Roy - Rockwall TX
John Thomson - Spring Lake NJ

Assignee:

Lucent Technologies Inc. - Murray Hill NJ

International Classification:

H01F 4104

US Classification:

29608

Abstract:

The method of making a metallized magnetic substrate for devices including a magnetic component involves providing an unfired ceramic body. In one exemplary embodiment, the method further involves making one or more vias through the ceramic body, coating the via side walls with conductive material, forming an aperture through the ceramic body, such that an aperture edge intersects the via, and metallizing the unfired ceramic body such that a conductive pathway is formed that includes the conductive material in the via. Finally, the metallized unfired ceramic body is fired in conventional fashion, optionally followed by deposition of additional conductor material.

US Patent:

52397440, Aug 31, 1993

Filed:

Jan 9, 1992

Appl. No.:

7/818669

Inventors:

Debra A. Fleming - Lake Hiawatha NJ
David W. Johnson - Bedminster NJ
Warren W. Rhodes - Raritan NJ
Apurba Roy - Rockwall TX
John Thomson - Sprink Lake NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

H01F 4102

US Classification:

296021

Abstract:

Multilayer magnetic components can be made with reduced cracking and magnetic degradation by forming layers having patterns of magnetic and insulating regions separated by regions that are removable during sintering. Advantageously, when the layers are stacked, layers of removable material are also disposed between magnetic regions and insulating regions so as to produce upon sintering a magnetic core within an insulating body wherein the core is substantially completely surrounded by a thin layer of free space.

US Patent:

50473697, Sep 10, 1991

Filed:

May 1, 1989

Appl. No.:

7/345924

Inventors:

Debra A. Fleming - Lake Hiawatha NJ
David W. Johnson - Pluckemin NJ
Shobha Singh - Summit NJ
LeGrand G. VanUitert - Morristown NJ
George J. Zydzik - Columbia NJ

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

C03C 300
H01L 2102

US Classification:

437240

Abstract:

This invention is directed to a process of producing semiconductor devices which involves deposition of protective glass layers by a particle beam technique from targets of phosphosilicate glass, as well as a process for production of such targets. The phosphosilicate glass containing 1-15 mole percent P. sub. 2 O. sub. 5 is produced by a sol/gel technique which involves mixing of a fumed silica, with a surface area of 50-400 m. sup. 2 /g, preferably about 200 m. sup. 2 /g, with phosphoric acid and water to form a sol with 20-55 wt. % silica, allowing it to gel, drying at ambient conditions, dehydrating at about 650. degree. C. in an atmosphere of an inert gas and chlorine and fluorine containing gases, heating up at a certain rate of from 100. degree. to 180. degree. C. per hour to a peak sintering temperature below 1200. degree. C. and cooling so as to produce amorphous and transparent glass suitable for use as a target.

US Patent:

54184630, May 23, 1995

Filed:

Nov 24, 1993

Appl. No.:

8/157857

Inventors:

Debra A. Fleming - Lake Hiawatha NJ
George E. Peterson - Warren NJ

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

G01R 3102

US Classification:

324520

Abstract:

A process for detecting arc discharges in power cables connecting power supply board and at least one equipment rack, the power supply board including circuit breakers operable at a preset current level, said arc discharge occurring at a fraction of said current level. After the arc discharge is detected, a signal representing the presence of the arc discharge is supplied to a power supply control, and a control signal is provided by the power supply control to cause said at least one circuit breaker to open interrupting supply of power to an affected power cable.

US Patent:

47754010, Oct 4, 1988

Filed:

Jun 18, 1987

Appl. No.:

7/063196

Inventors:

Debra A. Fleming - Leonia NJ
David W. Johnson - Pluckemin NJ
John B. MacChesney - Lebanon NJ
Frederick W. Walz - Plainfield NJ

Assignee:

American Telephone and Telegraph Company, AT&T Bell Laboratories - Murray Hill NJ

International Classification:

C03B 37023

US Classification:

65 311

Abstract:

The disclosed method of producing optical fiber comprises providing a silica-based glass rod of diameter D that comprises a core region of effective diameter d surrounded by cladding material (D/d typcially>2) and a silica-based porous jacketing tube, inserting the glass core rod into the porous tube, consolidating the porous material and sintering the jacketing tube onto the core rod such that a substantially pore-free optical fiber preform results. Fiber is then drawn from the preform in the conventional manner. Consolidation and sintering is carried out at a temperature below the softening temperature of the material, typically

US Patent:

53894286, Feb 14, 1995

Filed:

Dec 8, 1992

Appl. No.:

7/987515

Inventors:

Debra A. Fleming - Lake Hiawatha NJ
Gideon S. Grader - Haifa, IL
David W. Johnson - Bedminster NJ
Henry M. O'Bryan - Plainfield NJ
Warren W. Rhodes - Raritan NJ

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

H01F 4102

US Classification:

428209

Abstract:

This invention is predicated upon applicants' discovery that conventional techniques for minimizing metal loss from sintered ceramic materials are not adequate in the fabrication of small ceramic components such as multilayer monolithic magnetic devices wherein a magnetic core is substantially surrounded by an insulating housing. Applicants have determined that this metal loss problem can be solved by providing the component with a housing layer having an appropriate concentration of metal. Specifically, if the insulating housing material around the magnetic core has, during the high temperature firing, the same partial pressure of metal as the magnetic core material, there is no net loss of metal from the core. In a preferred embodiment, loss of zinc from a MnZn ferrite core is compensated by providing a housing of NiZn ferrite or zinc aluminate with appropriate Zn concentrations. Similar considerations apply to other ceramic components.