Patents by Inventor Wai Choo Chai

Wai Choo Chai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for producing an optoelectronic device and optoelectronic device
    Patent number: 9559085
    Abstract: A method for producing an optoelectronic device is specified. A housing base body is formed with a self-healing polymer material. A recess is found in the housing base body. The recess is confined by a bottom surface and at least one side wall which are formed at least in places by the plastic material of the base body. An optoelectronic semiconductor chip has a first main surface, a second main surface facing away from the first main surface and at least one side surface connecting the first main surface and the second main surface with each other. The optoelectronic semiconductor chip is placed in the recess, so that the first main surface is brought in contact with the bottom surface and the at least one side surface is brought in contact with the at least one side wall.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: January 31, 2017
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Seng-Teong Chang, Choon Keat Or, Wai-Choo Chai, Chong-Tee Ong
  • Method for Producing an Optoelectronic Device and Optoelectronic Device
    Publication number: 20160005720
    Abstract: A method for producing an optoelectronic device is specified. A housing base body is formed with a self-healing polymer material. A recess is found in the housing base body. The recess is confined by a bottom surface and at least one side wall which are formed at least in places by the plastic material of the base body. An optoelectronic semiconductor chip has a first main surface, a second main surface facing away from the first main surface and at least one side surface connecting the first main surface and the second main surface with each other. The optoelectronic semiconductor chip is placed in the recess, so that the first main surface is brought in contact with the bottom surface and the at least one side surface is brought in contact with the at least one side wall.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 7, 2016
    Applicant: OSRAM Opto Semiconductors GmbH
    Inventors: Seng-Teong Chang, Choon Keat Or, Wai-Choo Chai, Chong-Tee Ong
  • Silicone resin for protecting a light transmitting surface of an optoelectronic device
    Patent number: 8017246
    Abstract: A silicone resin composition and process for coating a light transmitting surface of an optoelectronic device is disclosed. The process involves applying a silicone resin to the light transmitting surface, and causing the silicone resin to cure to form a light transmitting protective coating on the light transmitting surface, the silicone resin having a sufficiently low proportion of organosiloxanes having molecular weights of up to about 1000, such that the protective coating includes less than about 10% of the organosiloxanes having molecular weights of up to about 1000.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: September 13, 2011
    Assignees: Philips Lumileds Lighting Company, LLC, Shin-Etsu Chemical Co., Ltd.
    Inventors: Yasumasa Morita, Nicolaas Joseph Martin van Leth, Cheun Jye Yow, Wai Choo Chai, Kinya Kodama, Tsutomu Kashiwagi, Toshio Shiobara
  • Silicone Resin for Protecting a Light Transmitting Surface of an Optoelectronic Device
    Publication number: 20090123764
    Abstract: A silicone resin composition and process for coating a light transmitting surface of an optoelectronic device is disclosed. The process involves applying a silicone resin to the light transmitting surface, and causing the silicone resin to cure to form a light transmitting protective coating on the light transmitting surface, the silicone resin having a sufficiently low proportion of organosiloxanes having molecular weights of up to about 1000, such that the protective coating includes less than about 10% of the organosiloxanes having molecular weights of up to about 1000.
    Type: Application
    Filed: November 8, 2007
    Publication date: May 14, 2009
    Applicants: PHILIPS LUMILEDS LIGHTING COMPANY, LLC, SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Yasumasa Morita, Nicolaas Joseph Martin van Leth, Cheun Jye Yow, Wai Choo Chai, Kinya Kodama, Tsutomu Kashiwagi, Toshio Shiobara