Patents by Inventor Masahiko Kobayakawa

Masahiko Kobayakawa 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: 20180287029
    Abstract: A semiconductor light-emitting device includes a lead frame, a semiconductor light-emitting element mounted on the top surface of the bonding region, and a case covering part of the lead frame. The bottom surface of the bonding region is exposed to the outside of the case. The lead frame includes a thin extension extending from the bonding region and having a top surface which is flush with the top surface of the bonding region. The thin extension has a bottom surface which is offset from the bottom surface of the bonding region toward the top surface of the bonding region.
    Type: Application
    Filed: June 4, 2018
    Publication date: October 4, 2018
    Inventor: Masahiko KOBAYAKAWA
  • Patent number: 10074645
    Abstract: A compact LED module and a method of manufacturing such an LED module are provided. The LED module includes a first-pole first lead, a first-pole second lead, a first-pole third lead, a second-pole first lead, a second-pole second lead, a second-pole third lead, a first LED chip, a second LED chip, a third LED chip, and a housing. A distal end of the first-pole first lead is offset toward a second-pole side in a first direction with respect to both a distal end of the second-pole second lead and a distal end of the second-pole third lead.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: September 11, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Masahiko Kobayakawa
  • Patent number: 10050179
    Abstract: An LED module 101 is provided with an LED chip 200 that includes a sub-mount substrate 210 made of Si and a semiconductor layer 220 laminated on the sub-mount substrate 210. The module also includes white resin 280 that does not transmit light from the semiconductor layer 220 and that covers at least part of a side of the sub-mount substrate 210, where the side is connected to the surface on which the semiconductor layer 220 is laminated. These arrangements enhance the brightness of the LED module 101.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: August 14, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Masahiko Kobayakawa
  • Publication number: 20180218967
    Abstract: A semiconductor light emitting device includes semiconductor light source, a resin package surrounding the semiconductor light source, and a lead fixed to the resin package. The lead is provided with a die bonding pad for bonding the semiconductor light source, and with an exposed surface opposite to the die bonding pad The exposed surface is surrounded by the resin package in the in-plane direction of the exposed surface.
    Type: Application
    Filed: March 28, 2018
    Publication date: August 2, 2018
    Inventors: Masahiko KOBAYAKAWA, Kazuhiro MIREBA, Shintaro YASUDA, Junichi ITAI, Taisuke OKADA
  • Patent number: 10038130
    Abstract: An LED (Light Emitting Diode) module includes an LED unit having one or more LED chips and a case. The case includes: a body including a base plate made of ceramic, the base plate having a main surface and a bottom surface opposite to the main surface; a through conductor penetrating through the base plate; and one or more pads formed on the main surface and making conductive connection with the through conductor, the pads mounting thereon the LED unit. The through conductor includes a main surface exposed portion exposed to the main surface and overlapping the LED unit when viewed from top, a bottom surface reaching portion connected to the main surface exposed portion and reaching the bottom surface. The pads cover at least a portion of the main surface exposed portion.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 31, 2018
    Assignee: Rohm Co., Ltd.
    Inventors: Masahiko Kobayakawa, Shinji Isokawa, Riki Shimabukuro
  • Patent number: 10008650
    Abstract: A semiconductor light-emitting device includes a lead frame, a semiconductor light-emitting element mounted on the top surface of the bonding region, and a case covering part of the lead frame. The bottom surface of the bonding region is exposed to the outside of the case. The lead frame includes a thin extension extending from the bonding region and having a top surface which is flush with the top surface of the bonding region. The thin extension has a bottom surface which is offset from the bottom surface of the bonding region toward the top surface of the bonding region.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: June 26, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Masahiko Kobayakawa
  • Publication number: 20180151544
    Abstract: An LED module includes: a substrate having a main surface and a back surface which face in opposite directions from each other in a thickness direction; a first LED chip including a first electrode pad bonded to a surface facing the same direction as the main surface; a first wire having one end bonded to the first electrode pad; and a wiring pattern having a main surface electrode formed in the main surface, wherein the main surface electrode includes a first die pad portion which supports the first LED chip, and when viewed from the thickness direction, the first die pad portion includes a main pad portion to which the first LED chip is bonded and an auxiliary pad portion which protrudes from the main pad portion in a direction toward a position of the first electrode pad from the center position in the first LED chip.
    Type: Application
    Filed: January 24, 2018
    Publication date: May 31, 2018
    Inventor: Masahiko KOBAYAKAWA
  • Patent number: 9953901
    Abstract: A semiconductor light emitting device includes a semiconductor light source, a resin package surrounding the semiconductor light source, and a lead fixed to the resin package. The lead is provided with a die bonding pad for bonding the semiconductor light source, and with an exposed surface opposite to the die bonding pad The exposed surface is surrounded by the resin package in the in-plane direction of the exposed surface.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: April 24, 2018
    Assignee: ROHM CO., LTD.
    Inventors: Masahiko Kobayakawa, Kazuhiro Mireba, Shintaro Yasuda, Junichi Itai, Taisuke Okada
  • Publication number: 20180108820
    Abstract: A method is provided for making optical semiconductor devices collectively. LED chips are arranged on a material substrate, and the substrate is sandwiched by a common mold and a first cooperating mold formed with a cavity. A light-transmitting resin is injected into the cavity and solidified to form a light-transmitting resin member including body portions for sealing the LED chips and connecting portions each connecting adjacent body portions. Then, the substrate is sandwiched by the common mold and a second cooperating mold formed with another cavity. A light-shielding resin is injected into the cavity and solidified to form a light-shielding resin member filling the gaps between the body portions. The body portions are separated from each other by making cuts in the material substrate and the light-shielding resin member.
    Type: Application
    Filed: December 18, 2017
    Publication date: April 19, 2018
    Inventor: Masahiko KOBAYAKAWA
  • Publication number: 20180090478
    Abstract: A compact LED module and a method of manufacturing such an LED module are provided. The LED module includes a first-pole first lead, a first-pole second lead, a first-pole third lead, a second-pole first lead, a second-pole second lead, a second-pole third lead, a first LED chip, a second LED chip, a third LED chip, and a housing. A distal end of the first-pole first lead is offset toward a second-pole side in a first direction with respect to both a distal end of the second-pole second lead and a distal end of the second-pole third lead.
    Type: Application
    Filed: November 30, 2017
    Publication date: March 29, 2018
    Inventor: Masahiko KOBAYAKAWA
  • Publication number: 20180076371
    Abstract: A semiconductor light emitting device includes a semiconductor light source, a resin package surrounding the semiconductor light source, and a lead fixed to the resin package. The lead is provided with a die bonding pad for bonding the semiconductor light source, and with an exposed surface opposite to the die bonding pad. The exposed surface is surrounded by the resin package in the in-plane direction of the exposed surface.
    Type: Application
    Filed: November 20, 2017
    Publication date: March 15, 2018
    Inventors: Masahiko KOBAYAKAWA, Kazuhiro MIREBA, Shintaro YASUDA, Junichi ITAI, Taisuke OKADA
  • Patent number: 9899357
    Abstract: An LED module includes: a substrate having a main surface and a back surface which face in opposite directions from each other in a thickness direction; a first LED chip including a first electrode pad bonded to a surface facing the same direction as the main surface; a first wire having one end bonded to the first electrode pad; and a wiring pattern having a main surface electrode formed in the main surface, wherein the main surface electrode includes a first die pad portion which supports the first LED chip, and when viewed from the thickness direction, the first die pad portion includes a main pad portion to which the first LED chip is bonded and an auxiliary pad portion which protrudes from the main pad portion in a direction toward a position of the first electrode pad from the center position in the first LED chip.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: February 20, 2018
    Assignee: Rohm Co., Ltd.
    Inventor: Masahiko Kobayakawa
  • Patent number: 9876150
    Abstract: A method is provided for making optical semiconductor devices collectively. LED chips are arranged on a material substrate, and the substrate is sandwiched by a common mold and a first cooperating mold formed with a cavity. A light-transmitting resin is injected into the cavity and solidified to form a light-transmitting resin member including body portions for sealing the LED chips and connecting portions each connecting adjacent body portions. Then, the substrate is sandwiched by the common mold and a second cooperating mold formed with another cavity. A light-shielding resin is injected into the cavity and solidified to form a light-shielding resin member filling the gaps between the body portions. The body portions are separated from each other by making cuts in the material substrate and the light-shielding resin member.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: January 23, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Masahiko Kobayakawa
  • Publication number: 20180019383
    Abstract: A semiconductor light-emitting device includes a base, a light-emitting element and a sealing resin. The base includes an obverse surface and a reverse surface spaced in a first direction, first side surfaces spaced in a second direction crossing the first direction, and second side surfaces spaced in a third direction crossing the first and second directions. The light-emitting element is on the base obverse surface. The sealing resin for covering the light-emitting element is smaller than the base in plan. The base has a wiring pattern connected to the light-emitting element and including an obverse surface electrode on the base obverse surface. The base also has a resist layer including a pattern-covering portion overlapping with the obverse surface electrode. The pattern-covering portion includes a resin outflow preventing portion, disposed outside the sealing resin in plan and extends continuously from one second side surface to the other.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 18, 2018
    Inventors: Masahiko KOBAYAKAWA, Tomoichiro TOYAMA
  • Patent number: 9865585
    Abstract: A compact LED module and a method of manufacturing such an LED module are provided. The LED module includes a first-pole first lead, a first-pole second lead, a first-pole third lead, a second-pole first lead, a second-pole second lead, a second-pole third lead, a first LED chip, a second LED chip, a third LED chip, and a housing. A distal end of the first-pole first lead is offset toward a second-pole side in a first direction with respect to both a distal end of the second-pole second lead and a distal end of the second-pole third lead.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: January 9, 2018
    Assignee: ROHM CO., LTD.
    Inventor: Masahiko Kobayakawa
  • Publication number: 20170345800
    Abstract: An LED module includes: a substrate having a main surface and a back surface which face in opposite directions from each other in a thickness direction; a first LED chip including a first electrode pad bonded to a surface facing the same direction as the main surface; a first wire having one end bonded to the first electrode pad; and a wiring pattern having a main surface electrode formed in the main surface, wherein the main surface electrode includes a first die pad portion which supports the first LED chip, and when viewed from the thickness direction, the first die pad portion includes a main pad portion to which the first LED chip is bonded and an auxiliary pad portion which protrudes from the main pad portion in a direction toward a position of the first electrode pad from the center position in the first LED chip.
    Type: Application
    Filed: April 13, 2017
    Publication date: November 30, 2017
    Inventor: Masahiko KOBAYAKAWA
  • Publication number: 20170331010
    Abstract: An LED module is provided with a lead, an LED chip mounted on the obverse surface of the lead, and a case covering at least a part of the lead. The case has a side wall surrounding the LED chip. The lead includes a thin extension whose bottom surface is spaced apart upward from the reverse surface of the lead in the thickness direction of the lead.
    Type: Application
    Filed: August 2, 2017
    Publication date: November 16, 2017
    Inventor: Masahiko KOBAYAKAWA
  • Publication number: 20170309592
    Abstract: A semiconductor device includes a base member, a wiring portion, a semiconductor element, and a resin package. The base member has an obverse surface, a reverse surface, and a side surface connecting the obverse surface and the reverse surface. The semiconductor element is electrically connected to the wiring portion and arranged on the obverse surface of the base member. The resin package covers the semiconductor element. The wiring portion includes an obverse-surface portion formed on the obverse surface, a reverse-surface portion formed on the reverse surface, and a through portion connecting the obverse-surface portion and the reverse-surface portion. The through portion has an exposed surface exposed from the side surface of the base member and a larger portion. The larger portion is positioned more inward than the exposed surface as viewed in the thickness direction of the base member.
    Type: Application
    Filed: April 18, 2017
    Publication date: October 26, 2017
    Inventors: Masahiko KOBAYAKAWA, Tomoichiro TOYAMA
  • Publication number: 20170294567
    Abstract: An LED module according to the present invention includes an LED unit 2 and a case 1, where the LED unit includes an LED chip 21, and the case 1 includes a main body 11 made of a ceramic material and a pad 12a on which the LED unit 2 is mounted. The outer edge 121a of the pad 12a is positioned inward of the outer edge 2a of the LED unit 2 as viewed in plan. These arrangements prevent the light emission amount of the LED module A1 from reducing with time.
    Type: Application
    Filed: June 27, 2017
    Publication date: October 12, 2017
    Inventors: Masahiko KOBAYAKAWA, Tomoichiro TOYAMA
  • Publication number: 20170271310
    Abstract: An LED module includes a substrate having a main surface and a rear surface located opposite the main surface, a main surface electrode located on the main surface, a plurality of penetration electrodes connected to the main surface electrode and extending through the substrate, three or more LED chips arranged on the main surface electrode along a first direction, and a case arranged on the main surface to surround the main surface electrode. The LED chips include at least one LED chip that can emit red light, at least one LED chip that can emit green light and at least one LED chip that can emit blue light.
    Type: Application
    Filed: June 5, 2017
    Publication date: September 21, 2017
    Inventors: Takashi MORIGUCHI, Masahiko KOBAYAKAWA