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Guangyu Li

from Portland, OR
Age ~50
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Also known as:
Helen Li, Gyangyu Li, Helen Li Guangyu, Li Guangyu, Guang Yuli
Related to:
Lan Zhang, 53Li Zhe, 54Li Liu, 51Jungshan LiZhonglian LiJulia Li, 54Lin V Zhang, 51Li Zhe, 50Lizhen Cai, 52Helen Li
Connected to:
Aici Li, 51Anbei L Li, 70Arden Y Li, 42Baiyong Li, 55Biao Li, 56Binglin Li, 43Candace H Li, 30Changhong Li, 56Chenglong Li, 59Chine E Li, 55

Guangyu Li Phones & Addresses

  • Portland, OR
  • 2208 Yorktown Dr, Ann Arbor, MI 48105
  • 2385 Bishop Ave, Ann Arbor, MI 48105 (734) 763-8411
  • 1861 Shirley Ln, Ann Arbor, MI 48105

Resumes

Resumes

Guangyu Li Photo 1

Guangyu Li

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Location:
Portland, OR
Skills:
Laser
Optics
Guangyu Li Photo 2

Guangyu Li

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Skills:
Microsoft Office
Guangyu Li Photo 3

Laser And Optics Engineer

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Position:
Laser and Optics Engineer at ESI
Location:
Portland, Oregon Area
Industry:
Electrical/Electronic Manufacturing
Work:
ESI since Dec 2005
Laser and Optics Engineer
Education:
University of Michigan 2000 - 2005
PhD, Electrical Engineering
Guangyu Li Photo 4

Guangyu Li

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Publications

Us Patents

Method Of Laser Micro-Machining Stainless Steel With High Cosmetic Quality

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US Patent:
20100078416, Apr 1, 2010
Filed:
Sep 26, 2008
Appl. No.:
12/238995
Inventors:
Weisheng LEI - Portland OR, US
Hisashi MATSUMOTO - Portland OR, US
Guangyu LI - Portland OR, US
Jeff HOWERTON - Portland OR, US
Assignee:
ELECTRO SCIENTIFIC INDUSTRIES - Portland OR
International Classification:
B23K 26/00
US Classification:
21912172
Abstract:
A process to laser micro-machine a metal part with a high cosmetic quality surface, including applying a protective coating layer to at least one surface of the part to physically isolate the surface from air prior to micro-machining the part with a laser, and sacrificing the protective layer to block/consume oxygen in air by carbonization and oxidation due to strong laser irradiation. The protective coating applied to at least one of a front side high quality cosmetic surface and a back side surface of the part. The coating layer being highly transparent to an applied laser beam, having a thickness of between approximately 5 mil and approximately 10 mil, inclusive, and having sufficient adhesion strength to adhere to the part without delaminating during processing. The laser can be selected from a nano-second pulse width laser and a micro-second pulse width laser to process the part.

Method Of Laser Micro-Machining Stainless Steel With High Cosmetic Quality

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US Patent:
20100078418, Apr 1, 2010
Filed:
Mar 27, 2009
Appl. No.:
12/413272
Inventors:
Weisheng Lei - San Jose CA, US
Mehmet E. Alpay - Portland OR, US
Hisashi Matsumoto - Hillsboro OR, US
Jeffrey Howerton - Portland OR, US
Guangyu Li - Portland OR, US
Peter Pirogovsky - Portland OR, US
Wilson Lu - Portland OR, US
Glenn Simenson - Portland OR, US
Assignee:
ELECTRO SCIENTIFIC INDUSTRIES, INC. - Portland OR
International Classification:
B23K 26/38
US Classification:
21912172
Abstract:
A process to laser micro-machine a metal part with a high cosmetic quality surface includes applying a protective coating layer to at least one surface of the part before micro-machining the part with a laser. The protective coating applied to the high quality cosmetic surface can have a thickness of between about 5 mil and about 10 mil, inclusive and have sufficient adhesion strength to adhere to the part without delaminating during processing. The protective coating applied to the machining surface of the part can be a metallic material, such as a metallic foil or tape.

Method For Laser Processing Glass With A Chamfered Edge

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US Patent:
20100147813, Jun 17, 2010
Filed:
Dec 17, 2008
Appl. No.:
12/336609
Inventors:
Weisheng Lei - San Jose CA, US
Glenn Simenson - Portland OR, US
Hisashi Matsumoto - Hillsboro OR, US
Guangyu Li - Portland OR, US
Jeffery Howerton - Portland OR, US
Assignee:
Electro Scientific Industries, Inc. - Portland OR
International Classification:
B23K 26/38
US Classification:
21912172, 21912173, 21912178
Abstract:
A laser machining process is described for laser machining glass or glass-like materials. This process machines articles or features in articles with chamfered edges in one manufacturing operation. Chamfered edges are desirable in glass and glass-like materials because they resist fracturing or chipping and eliminate sharp edges. Producing articles or features in articles in one manufacturing operation is desirable because it can save time and expense by eliminating the need to transfer the article to a separate machine for chamfering after laser machining. Alternatively, it can permit use of less expensive equipment because the same laser used for machining can be used to form the chamfer instead of having a separate process perform the chamfering. Producing chamfers with laser machining results in high quality chamfers without the need for a separate polishing or finishing step.

Method And Apparatus For Brittle Materials Processing

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US Patent:
20100252540, Oct 7, 2010
Filed:
Apr 2, 2010
Appl. No.:
12/753509
Inventors:
Weisheng Lei - San Jose CA, US
Hisashi Matsumoto - Hillsboro OR, US
Glenn Simenson - Tigard OR, US
Guangyu Li - Portland OR, US
Jeffrey Howerton - Portland OR, US
David Childers - Portland OR, US
Edward Johnson - Vernonia OR, US
Jeffrey Albelo - Portland OR, US
Assignee:
ELECTRO SCIENTIFIC INDUSTRIES, INC. - Portland OR
International Classification:
B23K 26/00
US Classification:
21912162
Abstract:
An improved method for laser machining features in brittle materials such as glass is presented, wherein a tool path related to a feature is analyzed to determine how many passes are required to laser machine the feature using non-adjacent laser pulses . Laser pulses applied during subsequent passes are located so as to overlap previous laser spot locations by a predetermined overlap amount. In this way no single spot receives excessive laser radiation caused by immediately subsequent laser pulses being applied adjacent to a previous pulse location.

Method For Improved Brittle Materials Processing

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US Patent:
20100252959, Oct 7, 2010
Filed:
Mar 25, 2010
Appl. No.:
12/732020
Inventors:
Weisheng Lei - San Jose CA, US
Glenn Simenson - Tigard OR, US
Hisashi Matsumoto - Hillsboro OR, US
Guangyu Li - Portland OR, US
Jeffrey Howerton - Portland OR, US
Assignee:
Electro Scientific Industries, Inc. - Portland OR
International Classification:
B44C 1/22
B29C 35/08
US Classification:
264400
Abstract:
An improved method for laser machining features in brittle materials such as glass is presented, wherein a tool path related to a feature is analyzed to determine how many passes are required to laser machine the feature using non-adjacent laser pulses. Laser pulses applied during subsequent passes are located so as to overlap previous laser spot locations by a predetermined overlap amount. In this way no single spot receives excessive laser radiation caused by immediately subsequent laser pulses being applied adjacent to a previous pulse location.

Reducing Back-Reflection In Laser Micromachining Systems

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US Patent:
20120152918, Jun 21, 2012
Filed:
Dec 17, 2010
Appl. No.:
12/972021
Inventors:
Guangyu Li - Portland OR, US
Mehmet E. Alpay - Portland OR, US
Assignee:
ELECTRO SCIENTIFIC INDUSTRIES, INC. - Portland OR
International Classification:
B23K 26/06
H01S 3/10
US Classification:
21912175, 372 9
Abstract:
Systems and methods reduce or prevent back-reflections in a laser processing system. A system includes a laser source to generate an incident laser beam, a laser beam output to direct the incident laser beam toward a work surface along a beam path, and a spatial filter. The system further includes a beam expander to expand a diameter of the incident laser beam received through the spatial filter, and a scan lens to focus the expanded incident laser beam at a target location on a work surface. A reflected laser beam from the work surface returns through the scan lens to the beam expander, which reduces a diameter of the reflected beam and increases a divergence angle of the reflected laser beam. The spatial filter blocks a portion of the diverging reflected laser beam from passing through the aperture and returning to the laser beam output.

Laser Direct Ablation With Picosecond Laser Pulses At High Pulse Repetition Frequencies

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US Patent:
20120248075, Oct 4, 2012
Filed:
Mar 31, 2011
Appl. No.:
13/076754
Inventors:
Mehmet E. Alpay - Portland OR, US
Hisashi Matsumoto - Hillsboro OR, US
Mark A. Unrath - Portland OR, US
Guangyu Li - Portland OR, US
Assignee:
ELECTRO SCIENTIFIC INDUSTRIES, INC. - Portland OR
International Classification:
B23K 26/36
B23K 26/04
US Classification:
21912162, 21912185
Abstract:
Laser direct ablation (LDA) produces patterns cut into a dielectric layer for the formation of electrically conductive traces with controlled signal propagation characteristics. LDA processing includes selecting a dose fluence for removing a desired depth of material along a scribe line on a surface of a workpiece, selecting a temporal pulsewidth for each laser pulse in a series of laser pulses, and selecting a pulse repetition frequency for the series of laser pulse. The pulse repetition frequency is based at least in part on the selected temporal pulsewidth to maintain the selected dose fluence along the scribe line. The selected pulse repetition frequency provides a predetermined minimum overlap of laser spots along the scribe line. The LDA process further includes generating a laser beam including the series of laser pulses according to the selected dose fluence, temporal pulsewidth, and pulse repetition frequency.

Multi-Axis Machine Tool, Methods Of Controlling The Same And Related Arragements

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US Patent:
20210276125, Sep 9, 2021
Filed:
Apr 30, 2018
Appl. No.:
16/499511
Inventors:
- Portland OR, US
Brian Johansen - Portland OR, US
Mark Kosmowski - Portland OR, US
Ho Wai Lo - Portland OR, US
Guangyu Li - Portland OR, US
International Classification:
B23K 26/08
B23K 26/082
B23K 26/12
Abstract:
Varied embodiments of a laser-based machine tool, and techniques for controlling the same are provided. Some embodiments relate to techniques to facilitate uniform and reproducible processing of workpieces. Other embodiments relate to a zoom lens having a quickly-variable focal length. Still other embodiments relate to various features of a laser-based multi-axis machine tool that can facilitate efficient delivery of laser energy to a scan head, that can address thermomechanical issues that may arise during workpiece processing, etc. Another embodiment relates to techniques for minimizing or preventing undesired accumulation of particulate matter on workpiece surfaces during processing. A number of other embodiments and arrangements are also detailed.
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Guangyu Li from Portland, OR, age ~50 Get Report