Patents by Inventor Tadahiko Sakai
Tadahiko Sakai 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).
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Publication number: 20240282594Abstract: A disclosed method for manufacturing an electronic-component-mounted substrate includes: a step (i) of forming a temporary fixing film 13 in such a manner as to cover a plurality of solder precoats (11) formed on a plurality of lands (10b) on a substrate and an antioxidation film (12) formed in such a manner as to cover the solder precoats; a step (ii) of disposing a plurality of electronic components (30) on the plurality of solder precoats (11) via the antioxidation film (12) and the temporary fixing film (13); and a step (iii) of soldering the plurality of electronic components (30) to the plurality of lands (10b) by melting the plurality of solder precoats (11). The antioxidation film (12) contains a first thermoplastic resin. The temporary fixing film (13) contains an activating agent and a second thermoplastic resin. The softening point of the second thermoplastic resin is equal to or lower than the softening point of the first thermoplastic resin.Type: ApplicationFiled: February 21, 2022Publication date: August 22, 2024Inventors: Tadashi MAEDA, Shingo OKAMURA, Yuki YOSHIOKA, Tadahiko SAKAI
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Publication number: 20240268036Abstract: A disclosed method for manufacturing an electronic-component-mounted substrate includes: a step (i) of forming a temporary fixing film (13) in such a manner as to cover a plurality of solder precoats (11) formed on a plurality of lands (10b) on a substrate and an antioxidation film (12) formed in such a manner as to cover the solder precoats; a step (ii) of disposing a plurality of electronic components (30) on the plurality of solder precoats (11) via the antioxidation film (12) and the temporary fixing film (13); and a step (iii) of soldering the plurality of electronic components (30) to the lands (10b) by melting the plurality of solder precoats (11). The antioxidation film (12) contains a first thermoplastic resin. The temporary fixing film (13) contains an activating agent and a second thermoplastic resin. The softening point of the first thermoplastic resin is equal to or lower than the softening point of the second thermoplastic resin.Type: ApplicationFiled: February 21, 2022Publication date: August 8, 2024Inventors: Shingo OKAMURA, Tadashi MAEDA, Yuki YOSHIOKA, Tadahiko SAKAI
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Publication number: 20240196545Abstract: An adhesive for temporarily fixing an electronic component to a solder precoat covered at least partially with an organic film, the adhesive including a principal resin, and a solvent dissolving the principal resin. The content of the solvent is 25 mass % or more and 40 mass % or less, and the organic film dissolves in the solvent when the solder precoat is melted. According thereto, the formation of an oxide film on the surface of the solder precoat can be suppressed, and poor connection between the electrode having the solder precoat and the electronic component can be suppressed.Type: ApplicationFiled: October 7, 2021Publication date: June 13, 2024Inventors: Yuki YOSHIOKA, Tadahiko SAKAI, Tadashi MAEDA, Shingo OKAMURA
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Publication number: 20240015893Abstract: A mounting substrate manufacturing method for soldering a terminal of an electronic component to a land 2 of a substrate 1 includes: a paste disposing step of disposing a solder paste on the land 2; a melting and solidifying step of melting and solidifying the solder paste, to form a precoated area 3 coated with solder, on the land 2; a breaking step of breaking a residue covering a surface of the precoated area 3 by pressing a tool 432, 442 against the precoated area 3; a flux disposing step of disposing a flux F on the precoated area 3; a component placement step of placing an electronic component on the substrate 1, with the terminal of the electronic component aligned with the precoated area 3; and a reflow step of heating the substrate 1 to melt the precoated area 3, to solder the terminal to the land 2. This can provide a mounting substrate manufacturing method that can reduce the occurrence of soldering defects.Type: ApplicationFiled: July 5, 2021Publication date: January 11, 2024Inventors: Masayuki MANTANI, Tadahiko SAKAI, Tadashi MAEDA, Yuki YOSHIOKA
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Patent number: 9999123Abstract: A connection structure of circuit members includes a first circuit member, a second circuit member, and a joint portion. The first circuit member has a first main surface on which a light-transparent electrode is provided. The second circuit member has a second main surface on which a metal electrode is provided. The joint portion is interposed between the first main surface and the second main surface. The joint portion includes a resin portion and a solder portion. The solder portion electrically connects the light-transparent electrode and the metal electrode. The light-transparent electrode contains an oxide that includes indium and tin, and the solder portion contains bismuth and indium.Type: GrantFiled: March 18, 2016Date of Patent: June 12, 2018Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Arata Kishi, Tadashi Maeda, Tadahiko Sakai
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Patent number: 9839143Abstract: Disclosed is a system for mounting a flexible first substrate having a first connection region provided with a first electrode group, on a second substrate having a second connection region provided with a second electrode group. The system includes: a stage configured to support the second substrate; a unit for supplying a bonding material including conductive particles and a thermosetting resin, to at least one of the first and second electrode groups; a unit for placing the first substrate on the second substrate via the bonding material and a unit for successively performing a joining process by pressing a first electrode toward a second electrode and curing the thermosetting resin, using a heating tool, while moving the tool to a processing position of another first electrode not yet subjected to the joining process.Type: GrantFiled: March 15, 2013Date of Patent: December 5, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Koji Motomura, Hideki Eifuku, Hiroki Maruo, Tadahiko Sakai
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Patent number: 9756728Abstract: Disclosed is a component-mounted structure including a first object having a plurality of first electrodes, a second object as an electronic component having second electrodes, a joint portion joining the plurality of first electrodes and the corresponding second electrodes to each other, and a resin-reinforcing portion. The joint portion has a core including at least one of a first metal and a resin particle, and a layer of an intermetallic compound of the first metal and a second metal having a low melting point. The resin-reinforcing portion includes a particulate matter including the core and the intermetallic compound, in a portion except between the first and second electrodes. An amount of the particulate matter included in the portion is 0.1 to 10 vol %.Type: GrantFiled: May 22, 2013Date of Patent: September 5, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadahiko Sakai, Hideki Eifuku, Koji Motomura
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Patent number: 9609760Abstract: An electronic component mounting method including the steps of: providing a first electronic component having a principal surface provided with a plurality of bumps; providing a substrate having a placement area provided with a plurality of first electrodes corresponding to the plurality of bumps; applying flux to the plurality of bumps; applying flux to at least one of the first electrodes adjacent to at least one reinforcement position set on a peripheral portion of the placement area; dispensing a thermosetting resin onto the reinforcement position, and at least partially coating the first electrode adjacent to the reinforcement position, with the thermosetting resin; placing the first electronic component on the substrate such that the bumps land on the corresponding first electrodes, and thus bringing the thermosetting resin into contact with a peripheral edge portion of the first electronic component; and heating the substrate with the first electronic component placed thereon.Type: GrantFiled: June 1, 2012Date of Patent: March 28, 2017Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Tsubasa Saeki, Yoshiyuki Wada, Koji Motomura, Tadahiko Sakai
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Patent number: 9516749Abstract: Disclosed is an electronic component-mounted structure including: a substrate, a conductive wiring pattern formed on a surface of the substrate, and an electronic component having an external terminal and being placed on the surface of the substrate at a mounting position including a terminal joint position of the conductive wiring pattern. The external terminal is joined to the conductive wiring pattern at the terminal joint position such that the external terminal is embedded in the conductive wiring pattern. Therefore, the junction between the external terminal and the conductive wiring pattern can have a high strength as compared with that obtained by joining the external terminal of the electronic component to the conductive wiring pattern merely on the surface of the conductive wiring pattern.Type: GrantFiled: February 21, 2013Date of Patent: December 6, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Yoshiyuki Wada, Tadahiko Sakai, Koji Motomura
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Publication number: 20160316554Abstract: A connection structure of circuit members includes a first circuit member, a second circuit member, and a joint portion. The first circuit member has a first main surface on which a light-transparent electrode is provided. The second circuit member has a second main surface on which a metal electrode is provided. The joint portion is interposed between the first main surface and the second main surface. The joint portion includes a resin portion and a solder portion. The solder portion electrically connects the light-transparent electrode and the metal electrode. The light-transparent electrode contains an oxide that includes indium and tin, and the solder portion contains bismuth and indium.Type: ApplicationFiled: March 18, 2016Publication date: October 27, 2016Inventors: ARATA KISHI, TADASHI MAEDA, TADAHIKO SAKAI
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Publication number: 20150373845Abstract: In an electronic component mounting structure, a plurality of bumps formed on an electronic component is joined to a plurality of electrodes formed on a substrate by way of joining portions formed with the bumps and solder. Bonding portions bond the electronic component to the substrate and the bonding portions are formed of thermosetting materials obtained by curing thermosetting resins having a curing temperature which is lower than a melting point of the solder between the electronic component and the substrate. The thermosetting materials come in contact with a nearest-neighboring joining portion in the bonding portions.Type: ApplicationFiled: June 10, 2015Publication date: December 24, 2015Inventors: Yoshiyuki WADA, Tadahiko SAKAI
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Publication number: 20150208509Abstract: Disclosed is a component-mounted structure including a first object having a plurality of first electrodes, a second object as an electronic component having second electrodes, a joint portion joining the plurality of first electrodes and the corresponding second electrodes to each other, and a resin-reinforcing portion. The joint portion has a core including at least one of a first metal and a resin particle, and a layer of an intermetallic compound of the first metal and a second metal having a low melting point. The resin-reinforcing portion includes a particulate matter including the core and the intermetallic compound, in a portion except between the first and second electrodes. An amount of the particulate matter included in the portion is 0.1 to 10 vol %.Type: ApplicationFiled: May 22, 2013Publication date: July 23, 2015Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadahiko Sakai, Hideki Eifuku, Koji Motomura
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Publication number: 20150163903Abstract: Disclosed is an electronic component-mounted structure including: a substrate, a conductive wiring pattern formed on a surface of the substrate, and an electronic component having an external terminal and being placed on the surface of the substrate at a mounting position including a terminal joint position of the conductive wiring pattern. The external terminal is joined to the conductive wiring pattern at the terminal joint position such that the external terminal is embedded in the conductive wiring pattern. Therefore, the junction between the external terminal and the conductive wiring pattern can have a high strength as compared with that obtained by joining the external terminal of the electronic component to the conductive wiring pattern merely on the surface of the conductive wiring pattern.Type: ApplicationFiled: February 21, 2013Publication date: June 11, 2015Applicant: Panasonic Intellectual Property Management Co., Ltd.Inventors: Yoshiyuki Wada, Tadahiko Sakai, Koji Motomura
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Patent number: 9015932Abstract: It is to provide an electronic component connecting method capable of performing dehumidification within a short time without giving a thermal influence to an electronic component which has already been mounted on a wiring board. When a first connection terminal group 5 formed on a connection area 3 of a rigid board 1 is connected to a flexible board 2 where a second connection terminal group 6 has been formed by employing a thermosetting resin in an electrically conductive manner, since a connection area 3 which is heated in a step for thermally hardening the thermosetting resin is locally preheated, moisture, and oils and fats contained in the connection area 3 among such moisture, and oils and fats, which have been absorbed in the rigid board 1 are dehumidified. Thereafter, the thermosetting resin interposed between the first connection terminal group 5 and the second connection terminal group 6 is thermally hardened.Type: GrantFiled: December 26, 2007Date of Patent: April 28, 2015Assignee: Panasonic CorporationInventors: Tadahiko Sakai, Hideki Eifuku
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Patent number: 8960526Abstract: There is provided a flux for soldering and a soldering process which form better solder connection without the occurrence of the poor connection nor the insulation degradation. Such flux which is placed between a solder portion formed on a first electrode and a second electrode when the first electrode is soldered to the second electrode contains: a liquid base material made of a resin component which is dissolved in a solvent, an active component which removes an oxide film, and a metal powder made of a metal of which melting point is higher than that of a solder material which forms the solder portion, and the flux contains the metal powder in an amount in the range between 1% and 9% by volume based on a volume of the flux.Type: GrantFiled: January 27, 2005Date of Patent: February 24, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadashi Maeda, Tadahiko Sakai
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Publication number: 20150047185Abstract: Disclosed is a system for mounting a flexible first substrate having a first connection region provided with a first electrode group, on a second substrate having a second connection region provided with a second electrode group. The system includes: a stage configured to support the second substrate; a unit for supplying a bonding material including conductive particles and a thermosetting resin, to at least one of the first and second electrode groups; a unit for placing the first substrate on the second substrate via the bonding material and a unit for successively performing a joining process by pressing a first electrode toward a second electrode and curing the thermosetting resin, using a heating tool, while moving the tool to a processing position of another first electrode not yet subjected to the joining process.Type: ApplicationFiled: March 15, 2013Publication date: February 19, 2015Applicant: PANASONIC CORPORATIONInventors: Koji Motomura, Hideki Eifuku, Hiroki Maruo, Tadahiko Sakai
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Patent number: 8851138Abstract: A substrate backing device places and holds a rigid substrate thereon and receives, from therebelow, a pressing force during operations for thermocompressively bonding a flexible substrate thereto. The substrate backing device includes a plate-shaped backing plate provided with a backing support surface adapted to come into contact with the lower surface of the rigid substrate for supporting it. The backing support surface is provided with an opening portion having a planar opening shape encompassing the area of the rigid substrate to be compressively bonded to the flexible substrate. The backing support surface is provided, within the opening portion, a receiving member which, during the thermocompression bonding operations, come into contact with the lower surface of the rigid substrate and with an already-mounted component having been preliminarily mounted on this lower surface in the compression-bonding area and, further, apply an upward supporting counterforce corresponding to the pressing force.Type: GrantFiled: July 5, 2011Date of Patent: October 7, 2014Assignee: Panasonic CorporationInventors: Hiroki Maruo, Koji Motomura, Hideki Eifuku, Tadahiko Sakai
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Patent number: 8817487Abstract: Disclosed are an electronic component mounting system and an electronic component mounting method capable of ensuring high connection reliability. An electronic component mounting system (1) includes a component mounting section which includes a solder printing device (M1), a coating/inspection device (M2), a component mounting device (M3), and a reflow device (M4), and mounts an electronic component on a main substrate (4), and a substrate connection section which includes a bonding material supply/substrate mounting device (M5) and a thermal compression device (M6), and connects the main substrate (4) with the component mounted thereon and a module substrate (5) to each other.Type: GrantFiled: March 24, 2010Date of Patent: August 26, 2014Assignee: Panasonic CorporationInventors: Koji Motomura, Hideki Eifuku, Tadahiko Sakai
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Publication number: 20140231492Abstract: Disclosed is an electronic component mounting method including the steps of: providing a first electronic component having a principal surface provided with a plurality of bumps; providing a substrate having a plurality of first electrodes corresponding to the plurality of bumps; applying flux to the plurality of bumps; placing the first electronic component on the substrate such that the bumps land on the corresponding first electrodes via the flux; dispensing a thermosetting resin to at least one reinforcement position on the substrate with the first electronic component placed thereon, the at least one reinforcement position corresponding to a peripheral edge portion of the first electronic component; and heating the substrate with the first electronic component placed thereon, to melt the bumps and cure the thermosetting resin, followed by cooling, thereby to join the first electronic component to the substrate.Type: ApplicationFiled: May 23, 2012Publication date: August 21, 2014Applicant: PANASONIC CORPORATIONInventors: Tsubasa Saeki, Yoshiyuki Wada, Koji Motomura, Tadahiko Sakai
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Patent number: 8759688Abstract: The invention intends to provide an electronic component mounting structure where the repairability and the impact resistance are combined. In an electronic component mounting structure, a plurality of solder balls disposed in plane between an electronic component and a substrate is melted to bond the electronic component and the substrate and a resin of which tensile elongation after the curing is in the range of 5 to 40% is filled in portions that are gaps between the electronic component and the substrate and correspond to at least four corners of the electronic component to reinforce. Since the reinforcement area is small, the repairability such as the easy removability of the resin and the reusability of the substrate are excellent, the resin itself is allowed to expand to the impact at the drop to play a role of reinforcing the bonding without breaking, and the impact resistance is excellent as well.Type: GrantFiled: September 21, 2007Date of Patent: June 24, 2014Assignee: Panasonic CorporationInventors: Seiichi Yoshinaga, Yoshiyuki Wada, Tadahiko Sakai