Thomas J Hendrickson

US Patent:

40891038, May 16, 1978

Filed:

Jun 4, 1976

Appl. No.:

5/693049

Inventors:

Thomas E. Hendrickson - Minneapolis MN
Jack S. T. Huang - New Hope MN
Wolfgang Tetzlaff - Hopkins MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

B01J 1700

US Classification:

29577C

Abstract:

Methods for monolithic integrated circuit construction are presented wherein component device-isolating region self-alignment is provided and also, where an element of the device is provided through independent dopant provision steps to allow design flexibility in providing that device element and associated integrated circuit devices. The method is especially applicable to bipolar device construction.

US Patent:

47977248, Jan 10, 1989

Filed:

Jun 30, 1982

Appl. No.:

6/393891

Inventors:

Clifford H. Boler - New Hope MN
Marc D. Hartranft - Brooklyn Park MN
Thomas E. Hendrickson - Wayzata MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H01L 2704
H01L 2978

US Classification:

357 42

Abstract:

An IGFET is presented which includes a relatively low resistance path across the source-substrate junction to prevent parasitic bipolar effects while maintaining high component density in integrated circuits. The low resistance path across the source-substrate junction is formed by various methods including damaging the crystal structure at the junction interface, supplementing the damaged junction with a heavily doped region underlying the source region and spiking metallurgy. A particular application of the invention allows the prevention of latchup in CMOS devices. The invention also allows the source region of an IGFET to serve the dual functions of a source for a MOSFET as well as an ohmic contact to the underlying well or substrate.

US Patent:

43191827, Mar 9, 1982

Filed:

Apr 18, 1980

Appl. No.:

6/141512

Inventors:

Marc D. Hartranft - Brooklyn Park MN
Thomas E. Hendrickson - Wayzata MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

G05F 500

US Classification:

323319

Abstract:

Electronic switching circuit is provided for controlling transfer of electrical power from an alternating polarity electrical power supply to a load means through use of a field-effect transistor device as the controlling element. A circuit arrangement is provided for switching into the "on" condition primary power control field-effect transistor device only when the voltage thereacross is at a relatively low value and for switching into the "off" condition this device in a gradual manner, relatively slowly reducing currents flowing therethrough. A circuit arrangement for a command source directing operation of the primary power transfer control field-effect transistor device provides command source isolation.

US Patent:

46100628, Sep 9, 1986

Filed:

Sep 6, 1984

Appl. No.:

6/647957

Inventors:

Jon A. Roberts - Minnetonka MN
Thomas E. Hendrickson - Wayzata MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H01G 700

US Classification:

29 2541

Abstract:

A capacitive acoustic transducer comprises a first field plate mounted to a semiconductor substrate structure, a second metal field plate having first and second oppositely and substantially exposed surfaces, and a mounting arrangement for mounting the second field plate to the semiconductor substrate structure so that the first and second field plates form an acoustically responsive capacitor, the first exposed surface of the second field plate substantially facing the first field plate, the mounting arrangement allowing the second field plate to respond to acoustic energy for altering the capacitance between the first and second field plates, the mounting arrangement including first and second contacts for respective connection to the first and second field plates. The method of fabricating this capacitive acoustic transducer includes the step of forming the second field plate on a disposable support structure, mounting the second field plate on the disposable support structure to the first field plate on the substrate structure and then disposing of the disposable support structure.

US Patent:

44953852, Jan 22, 1985

Filed:

Dec 2, 1982

Appl. No.:

6/446290

Inventors:

Jon A. Roberts - Minnetonka MN
Thomas E. Hendrickson - Wayzata MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H04R 2302

US Classification:

179111R

Abstract:

A capacitive acoustic transducer comprises a first field plate mounted to a semiconductor substrate structure, a second metal field plate having first and second oppositely and substantially exposed surfaces, and a mounting arrangement for mounting the second field plate to the semiconductor substrate structure so that the first and second field plates form an acoustically responsive capacitor, the first exposed surface of the second field plate substantially facing the first field plate, the mounting arrangement allowing the second field plate to respond to acoustic energy for altering the capacitance between the first and second field plates, the mounting arrangement including first and second contacts for respective connection to the first and second field plates. The method of fabricating this capacitive acoustic transducer includes the step of forming the second field plate on a disposable support structure, mounting the second field plate on the disposable support structure to the first field plate on the substrate structure and then disposing of the disposable support structure.

US Patent:

46189220, Oct 21, 1986

Filed:

Nov 16, 1981

Appl. No.:

6/321977

Inventors:

Marc D. Hartranft - Brooklyn Park MN
Thomas E. Hendrickson - Wayzata MN

Assignee:

Honeywell Inc. - Minneapolis MN

International Classification:

H02M 7219

US Classification:

363127

Abstract:

A circuit arrangement is provided for a command source directing operation of a subsequent circuit. This command source circuit, based on using cross-coupled transistors, is electrically isolated from the subsequent circuit when no commands are being generated, and provides an output of constant polarity for input command signals of either constant or varying polarity.