Patents by Inventor Tzong-Liang Tsai

Tzong-Liang Tsai 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).

  • Publication number: 20060186417
    Abstract: A light emitting diode and the method of the same are provided. The light emitting diode includes a light emitting structure and a metal reflective layer. The light emitting structure includes two semiconductor layers and an active layer. Oxide elements are added into the metal reflective layer to improve the adhesion between the reflective layer and the light emitting structure. Additionally, a transparent contact layer can be formed between the light emitting structure and the reflective layer in order to enhance the luminance efficiency.
    Type: Application
    Filed: December 22, 2005
    Publication date: August 24, 2006
    Inventors: Tzong-Liang Tsai, Chih-Li Chiang, Chih-Sung Chang, Way-Jze Wen
  • Publication number: 20060163592
    Abstract: A light emitting diode and its fabricating method are disclosed. A light emitting diode epitaxy structure is formed on a substrate, and then the light emitting diode epitaxy structure is etched to form a recess. The recess is then filled with a transparent dielectric material. An adhesive layer is utilized to adhere a conductive substrate and the light emitting diode epitaxy structure. Next, the substrate is removed.
    Type: Application
    Filed: April 19, 2005
    Publication date: July 27, 2006
    Inventors: Tzong-Liang Tsai, Way-Jze Wen, Chang-Han Chiang, Chih-Sung Chang
  • Publication number: 20060163599
    Abstract: A light emitting diode and the method of the same are provided. A light emitting diode epitaxy structure is formed on a substrate, and then the light emitting diode epitaxy structure is etched to form a recess. The recess is then filled with a transparent dielectric material. An ohmic contact layer and a reflective layer are formed sequentially, and then are etched to expose the transparent dielectric material. Finally, forming an adhesive conductive complex layer to fix the ohmic contact layer and the reflective layer on the light emitting diode epitaxy structure.
    Type: Application
    Filed: April 19, 2005
    Publication date: July 27, 2006
    Inventors: Tzong-Liang Tsai, Way-Jze Wen, Chang-Han Chiang, Chih-Sung Chang
  • Patent number: 7067340
    Abstract: A flip-chip light emitting diode and fabricating methods are disclosed. A soft transparent adhesive layer is utilized to past a transparent conductive substrate onto a light emitting diode epitaxy structure on a substrate, and the substrate is next removed entirely. Then, a mesa-etching process is performed to form a first top surface and a second top surface on the light emitting diode epitaxy structure for respectively exposing an n-type layer and a p-type layer in the light emitting diode epitaxy structure. Next, a metal reflective layer and a barrier layer are formed on the light emitting diode epitaxy structure in turn, and electrodes are finally fabricated on the barrier layer.
    Type: Grant
    Filed: May 31, 2005
    Date of Patent: June 27, 2006
    Assignee: Epistar Corporation
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Tzer-Perng Chen
  • Patent number: 7012281
    Abstract: A light emitting diode device and method of manufacturing comprises a light-transmission conductive layer and a patterned transparent conductive layer. In accordance with the present invention, the light-transmission conductive layer and the patterned transparent conductive layer is spread optimal area above the LED device so as to enhance the transparency and ohmic property of LED device.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: March 14, 2006
    Assignee: Epistar Corporation
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Chih-Li Chiang, Tzer-Perng Chen
  • Publication number: 20050253129
    Abstract: A light emitting diode with enhanced luminance and a method for manufacturing the light emitting diode are provided. The light emitting diode includes a substrate, a passivation layer including a material selected from a group consisting of a metal alloy, a metal oxide, a metal nitride, organic materials, inorganic materials and a combination thereof, a reflection layer, a first semiconductor layer, a multi-layer quantum well structure and a second semiconductor layer. The substrate possesses excellent electric/thermal conductivities.
    Type: Application
    Filed: September 23, 2004
    Publication date: November 17, 2005
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Wei-Chih Wen, Tzer-Perng Chen
  • Patent number: 6921924
    Abstract: A method for manufacturing a semiconductor light-emitting device. The semiconductor light-emitting device has a substrate, and a semiconductor layer, a n-type semiconductor layer, and a p-type semiconductor layer successively formed atop the substrate. The method forms an intermediate layer having a predetermined pattern between the substrate and the semiconductor layer, or between the semiconductor layer and the n-type semiconductor layer, or between the n-type semiconductor layer and the p-type semiconductor layer. The p-type semiconductor layer has an uneven top layer due to the intermediate layer having a predetermined pattern and the total internal reflection of the LED can be reduced. The intermediate layer is a conductive material to reduce serial resistance of the LED.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: July 26, 2005
    Assignee: United Epitaxy Company, LTD
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20050156183
    Abstract: The present invention discloses a light-emitting device that has a substrate, an n-type electrode, an active layer, a p-type semiconductor layer, a reflecting layer, and a p-type electrode. The n-type electrode is located on the bottom surface of the substrate and the active layer is located on a top surface of the substrate. The p-type semiconductor layer covers the active layer. The reflecting layer is located on the p-type semiconductor layer and covered by the p-type electrode and has an area not less than the area of the p-type electrode and not more than a half of the area of the p-type semiconductor layer. The reflecting layer is a conductive layer with high reflectivity, and is formed under the p-type electrode to reflect light from the active layer, avoiding light of the light-emitting device being absorbed by the metal electrode.
    Type: Application
    Filed: February 1, 2005
    Publication date: July 21, 2005
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Wei-En Chien, Tzer-Perng Chen
  • Patent number: 6894323
    Abstract: Disclosed is a Group III nitride semiconductor device comprising a stress-absorbing layer having: an amorphous silicon nitride layer, an aluminum interlayer, an amorphous aluminum nitride pre-layer and a polycrystalline Group III nitride layer containing aluminum. The stress-absorbing layer is located between a silicon substrate and a Group III nitride semiconductor, for alleviating stress resulted from different lattice constants between the Group III nitride substance and the silicon substrate, thereby preventing cracking of the Group III nitride semiconductor due to the stress. Further disclosed is a method of manufacturing Group III nitride semiconductor device.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: May 17, 2005
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang
  • Publication number: 20050093002
    Abstract: A light emitting diode device and method of manufacturing comprises a light-transmission conductive layer and a patterned transparent conductive layer. In accordance with the present invention, the light-transmission conductive layer and the patterned transparent conductive layer is spread optimal area above the LED device so as to enhance the transparency and ohmic property of LED device.
    Type: Application
    Filed: October 30, 2003
    Publication date: May 5, 2005
    Applicant: UNITED EPITAXY COMPANY, LTD.
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Chih-Li Chiang, Tzer-Perng Chen
  • Publication number: 20050082563
    Abstract: Disclosed is a Group III nitride semiconductor device comprising a stress-absorbing layer having: an amorphous silicon nitride layer, an aluminum interlayer, an amorphous aluminum nitride pre-layer and a polycrystalline Group III nitride layer containing aluminum. The stress-absorbing layer is located between a silicon substrate and a Group III nitride semiconductor, for alleviating stress resulted from different lattice constants between the Group III nitride substance and the silicon substrate, thereby preventing cracking of the Group III nitride semiconductor due to the stress. Further disclosed is a method of manufacturing Group III nitride semiconductor device.
    Type: Application
    Filed: March 4, 2004
    Publication date: April 21, 2005
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang
  • Publication number: 20050072968
    Abstract: The present invention discloses a light-emitting device that has a substrate, an n-type electrode, an active layer, a p-type semiconductor layer, a reflective layer, and a p-type electrode. The n-type electrode is located on the bottom surface of the substrate and the active layer is located on a top surface of the substrate. The p-type semiconductor layer covers the active layer. The reflective layer is located on the p-type semiconductor layer, and the p-type electrode covers the reflective layer. The reflective layer is a conductive layer with high reflectivity, and is formed under the p-type electrode to avoid light of the light-emitting device being absorbed by the metal electrode.
    Type: Application
    Filed: October 6, 2003
    Publication date: April 7, 2005
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Wei-En Chien, Tzer-Perng Chen
  • Publication number: 20050014303
    Abstract: A method for manufacturing a semiconductor light-emitting device. The semiconductor light-emitting device has a substrate, and a semiconductor layer, a n-type semiconductor layer, and a p-type semiconductor layer successively formed atop the substrate. The method forms an intermediate layer having a predetermined pattern between the substrate and the semiconductor layer, or between the semiconductor layer and the n-type semiconductor layer, or between the n-type semiconductor layer and the p-type semiconductor layer. The p-type semiconductor layer has an uneven top layer due to the intermediate layer having a predetermined pattern and the total internal reflection of the LED can be reduced. The intermediate layer is a conductive material to reduce serial resistance of the LED.
    Type: Application
    Filed: March 1, 2004
    Publication date: January 20, 2005
    Applicant: UNITED EPITAXY COMPANY, LTD.
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20040256627
    Abstract: A method for manufacturing a semiconductor light-emitting device. The semiconductor light-emitting device has a substrate, and a semiconductor layer, a n-type semiconductor layer, and a p-type semiconductor layer successively formed atop the substrate. The method forms an intermediate layer having a predetermined pattern between the substrate and the semiconductor layer, or between the semiconductor layer and the n-type semiconductor layer, or between the n-type semiconductor layer and the p-type semiconductor layer. The p-type semiconductor layer has an uneven top layer due to the intermediate layer having a predetermined pattern and the total internal reflection of the LED can be reduced. The intermediate layer is a conductive material to reduce serial resistance of the LED.
    Type: Application
    Filed: June 18, 2003
    Publication date: December 23, 2004
    Applicant: UNITED EPITAXY COMPANY, LTD.
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Tzer-Perng Chen
  • Patent number: 6781160
    Abstract: A semiconductor light emitting device and a method for manufacturing the same are disclosed. The semiconductor comprises a light scattering-deflecting layer located on a semiconductor layer having a scraggly surface. Light is deflected due to the difference of refractive index when the light enters the semiconductor layer from the light scattering-deflecting layer, and the light scatters when the light enters the scraggly surface of the semiconductor layer, thereby enabling the semiconductor light emitting device to emit more light so as to increase the light emitting efficiency of the semiconductor light emitting device.
    Type: Grant
    Filed: June 24, 2003
    Date of Patent: August 24, 2004
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Tzong-Liang Tsai, Chih-Sung Chang, Tzer-Perng Chen
  • Patent number: 6774410
    Abstract: The present invention provides a semiconductor device with reducing dislocation density. The semiconductor device includes multiple nucleuses between a substrate and an AlGaInN compound semiconductor. The dislocation density that is induced by crystal lattice differences between the substrate and the AlGaInN compound semiconductor is significantly reduced and the growth of the AlGaInN compound semiconductor is improved.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: August 10, 2004
    Assignee: United Epitaxy Company
    Inventors: Chih-Sung Chang, Tzong-Liang Tsai
  • Publication number: 20040089864
    Abstract: The present invention provides a structure of white light-emitting diode (LED) and a method of making the same. The structure according to the present invention comprises two LED chips that have light-emitting layers of multi-layer epitaxial structure and emit the lights of one or more colors. The structure comprises an LED emitting the visible light of short wavelength, and another LED emitting the visible light of long wavelength. Wherein, at least one chip in the present invention has two or more transition energy levels used for emitting two or more colored lights. With the use of the present invention, multiple colored lights emitted by the LED can be mixed into full-spectral white light source having excellent color rendering property and high light emitting efficiency.
    Type: Application
    Filed: March 26, 2003
    Publication date: May 13, 2004
    Inventors: Wu-Sheng Chi, Tzer-Perng Chen, Chih-Sung Chang, Tzong-Liang Tsai
  • Publication number: 20030071276
    Abstract: The present invention provides a semiconductor device with reducing dislocation density. The semiconductor device includes multiple nucleuses between a substrate and an AlGaInN compound semiconductor. The dislocation density that is induced by crystal lattice differences between the substrate and the AlGaInN compound semiconductor is significantly reduced and the growth of the AlGaInN compound semiconductor is improved.
    Type: Application
    Filed: November 13, 2002
    Publication date: April 17, 2003
    Applicant: United Epitaxy Company
    Inventors: Chih-Sung Chang, Tzong-Liang Tsai
  • Patent number: 6544868
    Abstract: The present invention provides a method of manufacturing a low resistivity p-type compound semiconductor material over a substrate. The method of the present invention comprises the steps of forming a p-type impurity doped compound semiconductor layer on the substrate by either HVPE, OMVPE or MBE and applying a microwave treatment over the p-type impurity doped compound semiconductor layer for a period of time. The high resistivity p-type impurity doped compound semiconductor layer is converted into a low resistivity p-type compound semiconductor material according to the present invention.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: April 8, 2003
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Tzong-Liang Tsai, Chung-Ying Chang
  • Patent number: 6504183
    Abstract: The present invention provides a semiconductor device with reducing dislocation density. The semiconductor device includes multiple nucleuses between a substrate and an AlGaInN compound semiconductor. The dislocation density that is induced by crystal lattice differences between the substrate and the AlGaInN compound semiconductor is significantly reduced and the growth of the AlGaInN compound semiconductor is improved.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: January 7, 2003
    Assignee: United Epitaxy Company
    Inventors: Chih-Sung Chang, Tzong-Liang Tsai