Patent application number | Description | Published |
20090084590 | CIRCUIT BOARD - A circuit board has a low thermal expansion coefficient that suits the thermal expansion coefficient of an element to be mounted thereupon and can prevent the occurrence of delamination and cracking of a core layer when the circuit board is used in a low temperature environment. The circuit board is constructed by laminating a core layer and at least one wiring layer, where the at least one wiring layer has slightly smaller external dimensions in a planar direction than the core layer. | 04-02-2009 |
20090196002 | PRINTED WIRING BOARD UNIT - A printed wiring board unit includes an electronic circuit component, a printed wiring board, a plurality of first conductive terminals disposed between the electronic circuit component and the printed wiring board, at least one of the first conductive terminals arranged along a quadrangular outline, and a plurality of second conductive terminals disposed between the electronic circuit component and the printed wiring board, the second conductive terminals arranged at a corner of the quadrangular outline, and the second conductive terminals contacting at least one of the printed wiring board and the electronic circuit component in a relatively displaceable manner. | 08-06-2009 |
20090294056 | METHOD OF MAKING PRINTED WIRING BOARD AND METHOD OF MAKING PRINTED CIRCUIT BOARD UNIT - The first support body is pressed against the second support body in response to the softening of the adhesive sheet. The fillers are allowed to reliably contact with one another between the first electrically-conductive land and the second electrically-conductive land. The fillers melt after the adhesive sheet has been softened. The intermetallic compounds are formed between the fillers and the electrically-conductive lands and between the fillers. Electrical connection is in this manner established between the first electrically-conductive land and the second electrically-conductive land. The matrix material and the adhesive sheet are then cured. The first support body and the second support body are firmly bonded to each other. | 12-03-2009 |
20090294160 | METHOD OF MAKING PRINTED WIRING BOARD AND ELECTRICALLY-CONDUCTIVE BINDER - A thermosetting resin sheet is sandwiched between first and second support bodies so that a first electrically-conductive land on the first support body is opposed to a second electrically-conductive land on the second support body in an opening formed in the sheet. The opening is filled with an electrically-conductive binder. The electrically-conductive binder includes matrix material containing a thermosetting resin and fillers including copper particles dispersed in the matrix material. The copper particles have the surface coated with a tin-bismuth alloy. When heat is applied to the electrically-conductive binder, the tin-bismuth alloy melts. The tin forms an intermetallic compound on the surface of the individual copper particle. The copper-tin alloy layers serve to unit the copper particles together. Electrical connection is established. The bismuth embeds the copper particles. The bismuth is hardened or cured. The matrix material is then hardened or cured. | 12-03-2009 |
20100014254 | Printed circuit board unit and semiconductor package - A terminal bump set including the outermost bump row inscribed in a first prism standing upright on the front surface of a package substrate. A heat conductive member contacts with the surface of the semiconductor element. The heat conductive member extends outward beyond the contour of the semiconductor element. A reinforcing member is interposed between the heat conductive member and the package substrate outside the contour of the semiconductor element. The reinforcing member is bonded to the front surface of the package substrate at a predetermined bonding area. The predetermined bonding area extends inward from the outer periphery of the package substrate over the front surface of the package substrate. The second prism stands upright on the front surface of the package substrate inside the first prism so as to allow the outermost bump row to circumscribe the second prism. | 01-21-2010 |
20100326714 | PRINTED CIRCUIT BOARD, PRINTED CIRCUIT BOARD FABRICATION METHOD, AND ELECTRONIC DEVICE INCLUDING PRINTED CIRCUIT BOARD - A printed circuit board include: a printed circuit board main body having a mounting area on a first surface of the printed circuit board main body and a recess being provided at a recess area on a second surface that is a back side of the first surface of the printed circuit board main body, the electronic component being mounted on the mounting area, the recess area being provided to correspond to the mounting area; and a thermal expansion control element being placed in the recess and having a smaller thermal expansion coefficient than the printed circuit board main body. | 12-30-2010 |
20110100690 | ELECTRICALLY CONDUCTIVE BODY AND PRINTED WIRING BOARD AND METHOD OF MAKING THE SAME - An electrically conductive body includes: a first electrically conductive material; a second electrically conductive material; and a bonding material bonding the first electrically conductive material to the second electrically conductive material at least for electric conduction. The bonding material is made of a metallic structure containing copper-tin based intermetallic compound phases and tin-bismuth phases, the copper-tin based intermetallic compound phases being continuous between the first electrically conductive material and the second electrically conductive material, the tin-bismuth phases being surrounded by the copper-tin based intermetallic compound phases. | 05-05-2011 |
20130021769 | MULTICHIP MODULE, PRINTED WIRING BOARD, METHOD FOR MANUFACTURING MULTICHIP MODULE, AND METHOD FOR MANUFACTURING PRINTED WIRING BOARD - A multichip module includes an arithmetic element that is a semiconductor element that executes arithmetic processing and a memory element that is arranged opposite the arithmetic element and that is a semiconductor element that stores therein data. Then, the multichip module includes the arithmetic element mounted thereon and includes a package board that includes, on a surface on which the arithmetic element is mounted, an external terminal that connects another part. Furthermore, the multichip module includes a reinforcing part on a surface at the opposite side from the surface of the package board on which the external terminal and that is arranged such that the reinforcing part covers an area from outside the peripheral portion of the arithmetic element to a predetermined position located on the central side of the package board. | 01-24-2013 |
20130083488 | SEMICONDUCTOR PACKAGE, WIRING BOARD UNIT, AND ELECTRONIC APPARATUS - A semiconductor package which is allocated between a wiring board and a cooling member, the semiconductor package, includes: a package board; a heating element which is mounted on the package board; a chip part which is mounted on the package board and provided around the heating element; and a heat transfer element having a main body unit which is jointed to the heating element with a metal joint material and a leg part which extends from the main body part to the package board and of which a tip is attached to the package board, and wherein the leg part, comprising: a first leg part allocated in a corner of the package board; and a second leg part which is allocated inside the first leg part between the heating element and the chip part on the package board. | 04-04-2013 |
20130083504 | ELECTRONIC DEVICE - An electronic device includes: a first plate; a wiring board arranged on the first plate and configured to have a plurality of first terminals on a surface opposite to a surface facing the first plate; an electronic component arranged above the wiring board and configured to have a plurality of second terminals on a surface facing the wiring board; a connecting unit arranged between the wiring board and the electronic component and configured to electrically couple the first terminals and the second terminals; a second plate arranged on the electronic component; a fixing unit arranged in an area outside of an area where the electronic component is placed and configured to pressurize the first plate and the second plate; and a pressing unit arranged below the area where the electronic component is placed and configured to press the wiring board toward the electronic component. | 04-04-2013 |
20130314877 | SEMICONDUCTOR PACKAGE AND WIRING BOARD UNIT - A semiconductor package includes: a package substrate; a semiconductor chip mounted on the package substrate; a heat conductor that has a body section joined to the semiconductor chip via a metal joining material and a leg section that surrounds the semiconductor chip, the leg section extending from the body section to the package substrate and having an end bonded to the package substrate; and stress reducing members configured to reduce stress exerted on the metal joining material located on the semiconductor chip, the stress reducing members being disposed on the package substrate at positions corresponding to corners of the semiconductor chip inside the leg section and joined to the package substrate and the body section. | 11-28-2013 |
20130341767 | SEMICONDUCTOR DEVICE MOUNTING STRUCTURE, METHOD OF MANUFACTURING THE SAME, AND ELECTRONIC APPARATUS - A semiconductor device mounting structure includes: a substrate with an opening provided therein; a frame member with a frame body and a protruding portion that protrudes from the frame body, the frame body being formed and accommodated in a groove around the opening; a coreless substrate provided above the substrate and supported by the protruding portion of the frame member; and semiconductor elements provided on the coreless substrate. | 12-26-2013 |
20140190669 | COOLING HEAD AND ELECTRONIC APPARATUS - A cooling head includes: a first refrigerant flow channel, provided so as to be in contact with an object to be cooled, configured to flow refrigerant; a second refrigerant flow channel configured to flow the refrigerant; and at least one communication hole, provided between both ends of the object to be cooled in the first refrigerant flow channel in a first flow direction of refrigerant in the first refrigerant flow channel, configured to allow the first refrigerant flow channel and the second refrigerant flow channel to communicate with each other. | 07-10-2014 |
20140193953 | METHOD OF MANUFACTURING SEMICONDUCTOR DEVICE MOUNTING STRUCTURE - A semiconductor device mounting structure includes: a substrate with an opening provided therein; a frame member with a frame body and a protruding portion that protrudes from the frame body, the frame body being formed and accommodated in a groove around the opening; a coreless substrate provided above the substrate and supported by the protruding portion of the frame member; and semiconductor elements provided on the coreless substrate. | 07-10-2014 |
20140209285 | METHOD FOR MANUFACTURING COOLING DEVICE, COOLING DEVICE AND ELECTRONIC COMPONENT PACKAGE EQUIPPED WITH COOLING DEVICE - A method for manufacturing an integral molded cooling device, a circulation channel of a refrigerant being formed in the inside of the cooling device, the method includes: laminating a channel forming plate, a top plate and a bottom plate, a plurality of comb tooth units being provided on the channel forming plate; and integrating the channel forming plate, the top plate and the bottom plate by diffusion joining. | 07-31-2014 |
20140319667 | SEMICONDUCTOR APPARATUS AND MANUFACTURING METHOD THEREOF - A semiconductor apparatus includes: a package substrate on which a semiconductor device is disposed; a mounting board over which the package substrate is mounted; a first restraint that penetrates through the mounting board and the package substrate, and restrains deformation of the mounting board and the package substrate in a direction in which the mounting board and the package substrate are separated from each other; and a second restraint that is disposed between the mounting board and the package substrate, and restrains deformation of the mounting board and the package substrate in a direction in which the mounting board and the package substrate are closer to each other. | 10-30-2014 |
20140376187 | PACKAGE MOUNTING STRUCTURE - A package mounting structure includes: a first substrate having wiring; a second substrate having wiring; at least one cooling unit having a first face and a second face different from the first face; at least one power supply unit that is mounted on the first substrate and is joined to the first face of the cooling unit; and at least one electronic component that is mounted on the second substrate and is joined to the second face of the cooling unit, wherein the power supply unit supplies power to the electronic component through the wiring of the first substrate, the cooling unit, and the wiring of the second substrate. | 12-25-2014 |