Ya Fei Chang from San Jose, CA, age 50

Professional Records

Medicine Doctors

Ya J. Chang

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Specialties:

Rheumatology, Internal Medicine

Work:

Ya Ju J Chang MD
41 Elizabeth St STE 203, New York, NY 10013
(212) 334-9590 (phone), (212) 334-9598 (fax)

Education:

Medical School
Univ Fed De Rio De Janeiro, Fac De Med, Rio De Janeiro, Rj, Brazil
Graduated: 1991

Procedures:

Arthrocentesis

Conditions:

Ankylosing Spondylitis (AS)
Lateral Epicondylitis
Rotator Cuff Syndrome and Allied Disorders
Acne
Acute Bronchitis

Languages:

Chinese
English
Spanish

Description:

Dr. Chang graduated from the Univ Fed De Rio De Janeiro, Fac De Med, Rio De Janeiro, Rj, Brazil in 1991. He works in New York, NY and specializes in Rheumatology and Internal Medicine.

Resumes

Ya Chang

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Ya Chang

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Business Records

Name / Title

Company / Classification

Phones & Addresses

Ya T. Chang
Principal

LEONG ENTERPRISE, LLC
Business Services

1208 W Medina Ave, Mesa, AZ 85202

Ya Qing Chang
President

YONG DE INTERNATIONAL TRADING, LTD

812 Washington St, San Francisco, CA 94108

Publications

Us Patents

Micro Light-Emitting Diode Display With 3D Orifice Plating And Light Filtering

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US Patent:

20200043902, Feb 6, 2020

Filed:

Apr 24, 2017

Appl. No.:

16/472925

Inventors:

- Spring TX, US
Ya Ling Chang - Palo Alto CA, US
Helen A. Holder - Palo Alto CA, US

Assignee:

Hewlett-Packard Development Company, L.P. - Spring TX

International Classification:

H01L 25/075
H01L 33/50

Abstract:

A micro light-emitting diode (LED) display assembly includes a backplane, a passivation layer on the backplane, a micro LED on the passivation layer, and a non-transparent metal housing on the passivation layer, wherein the housing includes a base portion on the passivation layer, a sidewall portion upwardly extending from the base portion, a cap portion connected at a top of the sidewall portion, an orifice in the cap portion, and a notch in the cap portion and adjacent to the orifice. The assembly also includes a translucent filter positioned in the notch and covering the orifice, and a pocket defined by an enclosed area in between the sidewall portion, the cap portion, the filter, and the passivation layer, wherein the micro LED is encased within the pocket such that light transmitted from the micro LED directly hits and passes through the filter.