Kenneth R Farmer

US Patent:

20050194979, Sep 8, 2005

Filed:

Mar 5, 2004

Appl. No.:

10/794177

Inventors:

Harry Roman - East Orange NJ, US
Kenneth Farmer - Lake Elmo MN, US
Xiaodong Wang - East Newark NJ, US
Baoqing Li - Harrison NJ, US

International Classification:

G01R031/08
G01R031/12
H01H009/50

US Classification:

324536000

Abstract:

An approved method and apparatus for detecting partial discharge events within a transformer comprises asserting a MEMS acoustical probe through the wall of the transformer to optically measure partial discharge events. In an enhanced embodiment, temperature compensation is also possible, and detection may be confirmed via an independent electromagnetic or other sensor.

US Patent:

20140060155, Mar 6, 2014

Filed:

Aug 28, 2013

Appl. No.:

14/012818

Inventors:

Gregory S. Lewis - Berkeley CA, US
Arantzazu Eiguren Fernandez - El Cerrito CA, US
Frederick Quant - Shoreview MN, US
Kenneth R. Farmer - Lake Elmo MN, US

Assignee:

TSI Incorporated - Shoreview MN

International Classification:

G01N 1/22

US Classification:

73 2804, 7386321, 7386322, 7386312

Abstract:

A system and a method is described herein for the collection of small particles in a concentrated manner, whereby particles are deposited onto a solid surface or collected into a volume of liquid. The collected samples readily interface to any of a number of different elemental, chemical, or biological or other analysis techniques.

US Patent:

58438327, Dec 1, 1998

Filed:

Mar 1, 1995

Appl. No.:

8/396237

Inventors:

Kenneth R. Farmer - Newark NJ
Thomas G. Digges - Fredericksburg VA
N. Perry Cook - Fredericksburg VA

Assignee:

Virginia Semiconductor, Inc. - Fredericksburg VA

International Classification:

H01L 2176

US Classification:

438406

Abstract:

A technique of bonding a thin wafer layer to a substrate. The wafer is blown dry using an inert gas to prevent it from being damaged, while still ensuring that it dries completely. The initial bonding is done by orienting crystallographic axes, and then allowing the wafers to adhere to one another slowly. The contact wave is prevented from spreading, by a divider between the two wafers. The wafers are allowed to adhere to one another slowly to form a bond. The bond is strengthened by annealing.

US Patent:

63039427, Oct 16, 2001

Filed:

Mar 17, 1998

Appl. No.:

9/042974

Inventors:

Kenneth Rudolph Farmer - Dunellen NJ

International Classification:

H01L 2906

US Classification:

257 30

Abstract:

The present invention relates to a tunnel barrier and to uses thereof, particularly in conjunction with devices and integrated circuits fabricated with silicon substrates, and including the preparation of tunnel diodes, dielectric structures, transistors, memory cells and the products embodying one or more of the same. The tunnel barrier of the invention is designed to confer effective and reliable charge transfer performance, and is particularly well suited for the fabrication of nonvolatile memory cells. In an embodiment of the invention, with the barrier incorporated in a diode, the present evacuee facilitates over 10. sup. 9 bi-directional charge transfers across the barrier without destroying it. The multiple layer nature of the barrier, coupled with the use of direct tunnel oxides, provides desirable functionality, stability, and resistance to dielectric degradation, thus improving operating, storage and retention characteristics over conventional nonvolatile devices.

US Patent:

20210356375, Nov 18, 2021

Filed:

Jul 29, 2021

Appl. No.:

17/388915

Inventors:

- Shoreview MN, US
Kenneth Farmer - Lake Elmo MN, US

International Classification:

G01N 15/06
G01N 15/14

Abstract:

Various embodiments include methods and apparatuses to reduce false-particle counts in a water-based condensation particle counter (CPC). In one embodiment, a cleanroom CPC has three parallel growth tube assemblies. A detector is coupled to an outlet of each of the three parallel growth tube assemblies, and is used to compare the particle concentrations measured from each of the three growth tube assemblies. An algorithm compares the counts from the three detectors and determines when the particles counted are real and when they are false counts. Any real particle event shows up in all three detectors, while false counts will only be detected by one detector. Statistics are used to determine at which particle count levels the measured counts are considered to be real versus false. Other methods and apparatuses are disclosed.

US Patent:

20210316175, Oct 14, 2021

Filed:

Oct 31, 2019

Appl. No.:

17/290216

Inventors:

- Berkeley CA, US
Kenneth Farmer - Lake Elmo MN, US
Melissa Grose - Shoreview MN, US
Susanne Vera Hering - Berkeley CA, US
Gregory Stephen Lewis - Berkeley CA, US
Steven Russel Spielman - Oakland CA, US
David Workman - Shoreview MN, US

International Classification:

A62B 27/00
G01N 1/22
G01N 15/06

Abstract:

A system includes a first and second condensation particle counter, each counter having an inlet port, a growth column, and an optical element for counting particles detected at the respective inlet ports. The counters are configured to include a wick in which the wick is wetted by water. A differential pressure sensor is coupled to the first inlet port and coupled to the second inlet port. The sensor is configured to provide a pressure signal. A processor is coupled to memory and configured to receive the first signal, the second signal, and the pressure signal and generate an output corresponding to a ratio of the first signal and the second signal and correlate the ratio with the pressure signal. A housing is configured to receive the first counter, the second counter, the differential pressure sensor, the processor, and the memory.

US Patent:

20200225140, Jul 16, 2020

Filed:

Jan 9, 2020

Appl. No.:

16/738292

Inventors:

- Shoreview MN, US
Kenneth Farmer - Lake Elmo MN, US

International Classification:

G01N 15/06
G01N 15/14

Abstract:

Various embodiments include methods and apparatuses to reduce false-particle counts in a water-based condensation particle counter (CPC). In one embodiment, a cleanroom CPC has three parallel growth tube assemblies. A detector is coupled to an outlet of each of the three parallel growth tube assemblies, and is used to compare the particle concentrations measured from each of the three growth tube assemblies. An algorithm compares the counts from the three detectors and determines when the particles counted are real and when they are false counts. Any real particle event shows up in all three detectors, while false counts will only be detected by one detector. Statistics are used to determine at which particle count levels the measured counts are considered to be real versus false. Other methods and apparatuses are disclosed.

US Patent:

20200056974, Feb 20, 2020

Filed:

Oct 30, 2017

Appl. No.:

16/346064

Inventors:

- Shoreview MN, US
Sean Morell - Saint Paul MN, US
Kenneth Farmer - Lake Elmo MN, US
Sreenath Avula - Arden Hills MN, US

International Classification:

G01N 15/06
B01D 5/00

Abstract:

Various embodiments include composite wicks for ultra-low noise condensation particle counters (CPCs). In one embodiment, a composite wick includes a first porous material having a first pore density, with the first porous material further having a first surface and an opposing second surface. A second porous material is in fluid communication with the first porous material and has a first surface with an area substantially the same as an area of the first surface of the first porous material. The first surface of the second porous material is substantially in contact with the first surface of the first porous material. The second porous material has a pore density that is dissimilar the first pore density of the first material. The first material and the second material are configured to provide vapor from a liquid to a fluid-based particle counter. Other apparatuses are disclosed.