Sung Jong Lee

US Patent:

6987859, Jan 17, 2006

Filed:

Jul 20, 2001

Appl. No.:

09/910110

Inventors:

Peter V. Loeppert - Hoffman Estates IL, US
Sung Bok Lee - Chicago IL, US

Assignee:

Knowles Electronics, LLC. - Itasca IL

International Classification:

H04R 25/00

US Classification:

381174, 381191

Abstract:

A raised microstructure for use in a silicon based device, such as a microphone, is disclosed. The raised microstructure comprises a generally planar film having a ribbed sidewall supporting the film.

US Patent:

7023066, Apr 4, 2006

Filed:

Nov 20, 2001

Appl. No.:

09/989513

Inventors:

Sung Bok Lee - Chicago IL, US
Peter V. Loeppert - Hoffman Estates IL, US

Assignee:

Knowles Electronics, LLC. - Itasca IL

International Classification:

H01L 29/82

US Classification:

257415, 438 53

Abstract:

A solid-state transducer is disclosed. The transducer comprises a semi-conductor substrate forming a support structure and having an opening. A thin-film structure forming a diaphragm responsive to fluid-transmitted acoustic pressure is disposed over the opening. The transducer further includes a plurality of semi-conductor supports and tangential arms extending from the diaphragm edge for connecting the periphery of the diaphragm to the supports. The tangential arms permit the diaphragm to rotate relative to the supports to relieve film stress in the diaphragm. The transducer still further includes a plurality of stop bumps disposed between the substrate and the diaphragm. The stop bumps determine the separation of the diaphragm from the substrate when the transducer is biased.

US Patent:

D690183, Sep 24, 2013

Filed:

Jun 19, 2012

Appl. No.:

29/424992

Inventors:

Sung K. Lee - Glenview IL, US

International Classification:

0806

US Classification:

D 8107

US Patent:

20080142475, Jun 19, 2008

Filed:

Dec 15, 2006

Appl. No.:

11/611633

Inventors:

Peter V. Loeppert - Hoffmann Estates IL, US
Anthony Minervini - Palos Hills IL, US
Jay Cech - St. Charles IL, US
Sung B. Lee - Chicago IL, US

Assignee:

KNOWLES ELECTRONICS, LLC - Itasca IL

International Classification:

C30B 33/08

US Classification:

216 23, 216 87

Abstract:

A directed energy source is applied to a portion of a material, creating at least one altered region and leaving at least one unaltered region. The material is exposed to an etchant which removes the at least one altered region leaving substantially all of the unaltered region.

US Patent:

20120144964, Jun 14, 2012

Filed:

Dec 14, 2011

Appl. No.:

13/326224

Inventors:

Sung K. Lee - Glenview IL, US

International Classification:

B25G 1/10

US Classification:

81489

Abstract:

A tool handle including: a body configured to receive a handle of a tool; a hand grip extending approximately perpendicular from the body; and an arm ring rotatably disposed on the body, wherein the arm ring is adapted to be placed in at least two positions, a first position in which the arm ring is generally perpendicular to the hand grip such that a user may place the user's forearm through the arm ring to grasp the hand grip and a second position in which the arm ring is generally parallel to the hand grip so as to minimize the width of the tool handle.

US Patent:

20130075836, Mar 28, 2013

Filed:

Sep 20, 2012

Appl. No.:

13/623598

Inventors:

KNOWLES ELECTRONICS, LLC - Itasca IL, US
Sung Bok Lee - Chicago IL, US

Assignee:

KNOWLES ELECTRONICS, LLC - Itasca IL

International Classification:

H01L 29/84

US Classification:

257416, 257E29324

Abstract:

A micro-electromechanical system (MEMS) device includes a housing and a base. The base includes a port opening extending therethrough and the port opening communicates with the external environment. The MEMS die is disposed on the base and over the opening. The MEMS die includes a diaphragm and a back plate and the MEMS die, the base, and the housing form a back volume. At least one vent extends through the MEMS die and not through the diaphragm. The at least one vent communicates with the back volume and the port opening and is configured to allow venting between the back volume and the external environment.

US Patent:

54923190, Feb 20, 1996

Filed:

Oct 11, 1994

Appl. No.:

8/327003

Inventors:

Sung C. Lee - Wheeling IL

International Classification:

A63B 6936

US Classification:

273181F

Abstract:

An indoor golf chip shot practice apparatus which is to be used for practicing chip shots in the game of golf. The apparatus comprises a rectangular prism shape safety net with only one opening to the side of the user, therefore, the golf ball stays inside of the safety net even in case of bad shots. The apparatus also comprises a frame to support and encompass the safety net and is designed in such a way that the golf ball rolls back on the floor of the safety net to the user after each shot.

US Patent:

44118740, Oct 25, 1983

Filed:

Apr 29, 1982

Appl. No.:

6/372996

Inventors:

Sung K. Lee - East Amherst NY

Assignee:

SCA Services, Inc. - Boston MA

International Classification:

C01B 2900

US Classification:

423 87

Abstract:

A method for detoxification of spent catalyst from a fluorination process includes the step of hydrolyzing such spent catalyst in the presence of aqueous calcium chloride to produce insoluble compounds which are separable from the aqueous medium. The spent catalyst is one which includes at least one antimony halide, such as SbCl. sub. 5, SbF. sub. 5, SbCl. sub. 3 and/or SbF. sub. 3, usually with some halogenated hydrocarbons, such as partially chlorinated methane, partially chlorinated ethane and/or chlorofluorocarbons of 1 to 5 carbon atoms, often in the presence of arsenic compounds, such as AsCl. sub. 3, hydrofluoric acid, and antimony chlorofluoride, such as SbCl. sub. 4 F. The spent catalyst may be directly treated with the aqueous calcium chloride solution, very preferably with such solution containing small amounts of a transition metal ion, such as Fe. sup. ++ or Fe. sup. +++, or aluminum ion, e. g. , Al. sup. +++, after which volatile gases emitted are treated, an organic liquid phase is separated from an aqueous liquid phase containing dispersed precipitated insoluble compounds of antimony and arsenic (when arsenic is present), such as calcium salts of acids thereof, oxides, hydroxides and/or oxyhalides thereof resulting from the hydrolysis reaction, such insolubles are separated from the aqueous liquid medium, as by filtration, and the filtrate is neutralized with lime.