Patents by Inventor Chih-Sung Chang

Chih-Sung Chang 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: 20060030063
    Abstract: A package structure of a light emitting diode includes a substrate structure, a connection layer, and at least one conductive passage. The substrate structure sequentially includes a conduction board, an insulation layer, and a conductive layer. The insulation layer is configured to electrically insulate the conduction board from the conductive layer, and also to insulate a first portion from a second portion of the conduction board. The substrate structure has an opening to expose the conduction board. The connection layer configured to support and electrically couple to a first electrode of a light emitting diode (LED) is disposed in the opening. The connection layer is also configured to electrically couple to the conduction board and to be electrically insulated from at least one portion of the conductive layer, which is coupled to a second electrode of the LED.
    Type: Application
    Filed: October 4, 2005
    Publication date: February 9, 2006
    Inventors: Pai-Hsiang Wang, Chih-Sung Chang, Tzer-Perng Chen
  • Patent number: 6984852
    Abstract: A package structure of a light emitting diode includes a substrate structure, a connection layer, and at least one conductive passage. The substrate structure sequentially includes a conduction board, an insulation layer, and a conductive layer. The insulation layer is configured to electrically insulate the conduction board from the conductive layer, and also to insulate a first portion from a second portion of the conduction board. The substrate structure has an opening to expose the conduction board. The connection layer configured to support and electrically couple to a first electrode of a light emitting diode (LED) is disposed in the opening. The connection layer is also configured to electrically couple to the conduction board and to be electrically insulated from at least one portion of the conductive layer, which is coupled to a second electrode of the LED.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: January 10, 2006
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Pai-Hsiang Wang, Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20050287687
    Abstract: A soft transparent adhesive layer is utilized to bond a transparent substrate material onto an AlGaInP light-emitting diode epitaxy on a GaAs substrate, and the GaAs 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 AlGaInP light-emitting diode epitaxy for respectively exposing an n-type layer and a p-type layer in the AlGaInP light-emitting diode epitaxy. Next, a metal reflective layer and a barrier layer are formed on the AlGaInP light-emitting diode epitaxy in turn, and electrodes are finally fabricated on the barrier layer.
    Type: Application
    Filed: August 13, 2004
    Publication date: December 29, 2005
    Inventors: Tien-Fu Liao, Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20050274971
    Abstract: A light emitting diode (LED) and a method of making the same are disclosed. The present invention is featured in that the LED comprises a transparent heat-conductive glue, a reflective layer, and a carrier, etc, wherein the transparent heat-conductive glue is used to adhere the epitaxial structure and the carrier of the LED; the reflective layer can make the light emitted by the epitaxial structure to be reflected more efficiently; and the carrier is used to enhance the heat-dissipation effect of the LED. Moreover, the transparent heat-conductive glue and the reflective layer can be replaced with one single adhesive reflective layer having functions of adhesion and reflection simultaneously.
    Type: Application
    Filed: June 10, 2004
    Publication date: December 15, 2005
    Inventors: Pai-Hsiang Wang, Chih-Sung Chang, 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
  • Publication number: 20050247945
    Abstract: An LED heat-radiating substrate and a method for making the same are proposed. The LED heat-radiating substrate has a low expansion layer body and two high thermal conductivity layer bodies formed at its two sides. Through mutual connection and containment of these layer bodies, the requirements of high heat-radiating effect and low expansion can be met. An LED structure can be arranged on the heat-radiating substrate to accomplish a high heat-radiating effect. Moreover, damage to the LED structure due to thermal expansion of the heat-radiating substrate can be avoided.
    Type: Application
    Filed: May 10, 2004
    Publication date: November 10, 2005
    Inventors: Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20050243880
    Abstract: A dual wavelength semiconductor laser emitting apparatus including a substrate having a first laser emitting device and a second laser emitting device, and a manufacturing method thereof are provided. The manufacturing method includes stacking an active layer of the second laser emitting device onto an upper cladding layer of the first laser emitting device, which is taken as a lower cladding layer of the second laser emitting device. Thereby the first laser emitting device and the second laser emitting device formed on the substrate possess a common electrode and respectively oscillate laser beams having different wavelengths in the semiconductor laser emitting apparatus.
    Type: Application
    Filed: September 28, 2004
    Publication date: November 3, 2005
    Inventors: Shu-Wei Chiu, Chih-Sung Chang
  • Patent number: 6958496
    Abstract: This invention this invention provides a light-emitting semiconductor device having enhanced brightness, to ensure even current distribution emitted by a front contact of the light emitting diodes so as to improve the light-emitting efficiency of the active layer. This invention adopts the method to manufacture the light-emitting device, comprising the steps of: forming an active layer on a substrate; forming a capping layer on the active layer to enhance current distribution, where a back contact is located on another side of the substrate and a front contact is located above the capping layer. This invention is characterized by: re-designing the front contact, by reducing the width of a metallic pattern constructing fingers or Mesh lines and increasing the number of the fingers or Mesh lines, so as to resolve the current crowding problem.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: October 25, 2005
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Wei-En Chien, Chih-Sung Chang, Chen Tzer-Perng
  • 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: 20050082555
    Abstract: This invention this invention provides a light-emitting semiconductor device having enhanced brightness, to ensure even current distribution emitted by a front contact of the light emitting diodes so as to improve the light-emitting efficiency of the active layer. This invention adopts the method to manufacture the light-emitting device, comprising the steps of: forming an active layer on a substrate; forming a capping layer on the active layer to enhance current distribution, where a back contact is located on another side of the substrate and a front contact is located above the capping layer. This invention is characterized by: re-designing the front contact, by reducing the width of a metallic pattern constructing fingers or Mesh lines and increasing the number of the fingers or Mesh lines, so as to resolve the current crowding problem.
    Type: Application
    Filed: March 4, 2004
    Publication date: April 21, 2005
    Inventors: Wei-En Chien, Chih-Sung Chang, Chen Tzer-Perng
  • 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
  • Publication number: 20040245591
    Abstract: A package structure of a light emitting diode includes a substrate structure, a connection layer, and at least one conductive passage. The substrate structure sequentially includes a conduction board, an insulation layer, and a conductive layer. The insulation layer is configured to electrically insulate the conduction board from the conductive layer, and also to insulate a first portion from a second portion of the conduction board. The substrate structure has an opening to expose the conduction board. The connection layer configured to support and electrically couple to a first electrode of a light emitting diode (LED) is disposed in the opening. The connection layer is also configured to electrically couple to the conduction board and to be electrically insulated from at least one portion of the conductive layer, which is coupled to a second electrode of the LED.
    Type: Application
    Filed: February 2, 2004
    Publication date: December 9, 2004
    Inventors: Pai-Hsiang Wang, Chih-Sung Chang, Tzer-Perng Chen
  • Publication number: 20040232436
    Abstract: A method for manufacturing a compound semiconductor optoelectronic device is proposed. There are steps of: forming an optoelectronic device epitaxial wafer, the optoelectronic device epitaxial wafer containing a V-shaped pit due to threading dislocation; forming an insulated isolation material in the V-shaped pit of the optoelectronic device epitaxial wafer; and forming an electrode layer on the optoelectronic device epitaxial wafer having the insulated isolation material in the V-shaped pit for completing the optoelectronic device.
    Type: Application
    Filed: March 8, 2004
    Publication date: November 25, 2004
    Inventors: Tzong-Liang Tasi, Yung-Chuan Yang, Chih-Sung Chang, Tzer-Perng Chen
  • Patent number: 6812067
    Abstract: A method for integrating a compound semiconductor with a substrate of high thermal conductivity is provided. The present invention employs a metal of low melting point, which is in the liquid state at low temperature (about 200° C.), to form a bonding layer. The method includes the step of providing a compound semiconductor structure, which includes a compound semiconductor substrate and an epitaxial layer thereon. Then, a first bonding layer is formed on the epitaxial layer. A substrate of thermal conductivity greater than that of the compound semiconductor substrate is selected. Then, a second bonding layer is formed on the substrate. The first bonding layer and the second bonding layer are pressed to form an alloy layer at low temperature.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: November 2, 2004
    Assignee: United Epitaxy Company, Ltd.
    Inventors: Tzer-Perng Chen, Chih-Sung Chang, Kuang-Neng Yang