摘要:
A substrate includes: a wiring substrate; a lower plate disposed below the wiring substrate; a canted coil spring disposed between the lower plate and the wiring substrate; an electronic component package disposed above the wiring substrate; a sheet disposed between the wiring substrate and the electronic component package and including a plurality of connection members that connects a plurality of first electrodes provided on an upper surface of the wiring substrate and a plurality of second electrodes provided on a lower surface of the electronic component package; an upper plate disposed on the electronic component package; and a coupling member that couples the lower plate and the upper plate, wherein the lower plate, the canted coil spring, the wiring substrate, the sheet, the electronic component package, and the upper plate are laminated and fixed in this order by coupling the lower plate and the upper plate by the coupling member.
摘要:
A printed board unit includes: a base material; an electrode formed on the base material; a resist film formed on the base material, the resist film has an opening to expose the electrode; a recess part formed on an inner wall of the resist film; an electronic component including a lead terminal electrically coupled to the electrode; and a bonding material which bonds the lead terminal to the electrode in the opening, a portion of the bonding material being mounted on the lead terminal at an inner side of the opening opposite to the recess part.
摘要:
A substrate includes: a wiring substrate; a lower plate disposed below the wiring substrate; a canted coil spring disposed between the lower plate and the wiring substrate; an electronic component package disposed above the wiring substrate; a sheet disposed between the wiring substrate and the electronic component package and including a plurality of connection members that connects a plurality of first electrodes provided on an upper surface of the wiring substrate and a plurality of second electrodes provided on a lower surface of the electronic component package; an upper plate disposed on the electronic component package; and a coupling member that couples the lower plate and the upper plate, wherein the lower plate, the canted coil spring, the wiring substrate, the sheet, the electronic component package, and the upper plate are laminated and fixed in this order by coupling the lower plate and the upper plate by the coupling member.
摘要:
A via model generation method includes: acquiring via arrangement information including a hole diameter of a via formed in a board including a plurality of wiring layers, a clearance distance between a ground conductor formed in one wiring layer of the plurality of wiring layers and the via, and a ground via distance between the via and a ground via coupled to the ground conductor; acquiring board information including a relative dielectric constant of the board; calculating a capacitance component of the via by a first electromagnetic field analysis using the hole diameter of the via, the clearance distance, and the relative dielectric constant of the board; calculating an inductance component of the via by a second electromagnetic field analysis using the hole diameter of the via, the ground via distance, and the relative dielectric constant of the board; and generating a via model including the capacitance and inductance components.
摘要:
A substrate includes: a wiring substrate; a lower plate disposed below the wiring substrate; a canted coil spring disposed between the lower plate and the wiring substrate; an electronic component package disposed above the wiring substrate; a sheet disposed between the wiring substrate and the electronic component package and including a plurality of connection members that connects a plurality of first electrodes provided on an upper surface of the wiring substrate and a plurality of second electrodes provided on a lower surface of the electronic component package; an upper plate disposed on the electronic component package; and a coupling member that couples the lower plate and the upper plate, wherein the lower plate, the canted coil spring, the wiring substrate, the sheet, the electronic component package, and the upper plate are laminated and fixed in this order by coupling the lower plate and the upper plate by the coupling member.
摘要:
A semiconductor device includes: a terminal configured to input a signal from a signal source; a receiver configured to receive the signal from the signal source through the terminal; and a terminal circuit configured to be coupled between the terminal and an input end of the receiver, and to suppress reflected wave caused by signal reflection at the receiver, wherein impedance of a wire line connecting the terminal and the input end of the receiver, and direct-current impedance of a resistance component included in the terminal circuit are set lower than impedance of an external wire line connected to the terminal.
摘要:
A substrate includes: a wiring substrate; a lower plate disposed below the wiring substrate; a canted coil spring disposed between the lower plate and the wiring substrate; an electronic component package disposed above the wiring substrate; a sheet disposed between the wiring substrate and the electronic component package and including a plurality of connection members that connects a plurality of first electrodes provided on an upper surface of the wiring substrate and a plurality of second electrodes provided on a lower surface of the electronic component package; an upper plate disposed on the electronic component package; and a coupling member that couples the lower plate and the upper plate, wherein the lower plate, the canted coil spring, the wiring substrate, the sheet, the electronic component package, and the upper plate are laminated and fixed in this order by coupling the lower plate and the upper plate by the coupling member.
摘要:
A semiconductor device includes: a terminal configured to input a signal from a signal source; a receiver configured to receive the signal from the signal source through the terminal; and a terminal circuit configured to be coupled between the terminal and an input end of the receiver, and to suppress reflected wave caused by signal reflection at the receiver, wherein impedance of a wire line connecting the terminal and the input end of the receiver, and direct-current impedance of a resistance component included in the terminal circuit are set lower than impedance of an external wire line connected to the terminal.
摘要:
An electronic apparatus includes a housing including an opening, an object to be cooled that is disposed in the housing, an air flow generation unit that generates cooling air which flows through the opening into the housing and flows to the object to be cooled, a plurality of filter units that remove a foreign matter contained in the cooling air, a blocking unit that blocks at least one filter unit to be cleaned, among the filter units, a controller that increases a flow rate of the cooling air using the air flow generation unit, and a cleaning processing unit that cleans the filter unit to be cleaned, the filter unit to be cleaned being blocked by the blocking unit.
摘要:
A coupling member is coupled to a support column of a rack. A plate-shaped member is rotatably engaged with a coupling member with one longitudinal end as an axis. An L-shaped member includes a first flat plate and a second flat plate orthogonal to the first flat plate and includes, with a transverse end of the first flat plate rotatably engaged with one plate face of the plate-shaped member with the longitudinal direction of the plate-shaped member as an axis and with a plate face of the first flat plate in intimate contact with the one plate face, a mounting member in which the second flat plate protrudes from one transverse end of the plate-shaped member and a fixing mechanism that fixes the mounting member with the plate face of the first flat plate in intimate contact with the one plate face of the plate-shaped member.