Abstract:
A land group with which a terminal group of a semiconductor package has been jointed, a conductor pattern which has been arranged in a mounting area where the semiconductor package was mounted and which has been jointed with a heat radiation plate of the semiconductor package, a conductor pattern at least a part of which has been arranged on the outside of the mounting area, and a conductor pattern which connects the conductor patterns are formed on a printed-wiring board. The land group includes a land adjacent to the conductor pattern and a land which is not adjacent to the conductor pattern. The land is formed in a shape different from that of the land so as to be away from the conductor pattern.
Abstract:
A control circuit board includes first and second elements on each surface of a board member. The first and the second elements respectively have first and third edge portions, which are opposite to each other and second and fourth edge portions which are opposite to each other. A plurality of signal input pins are provided to the first edge portion, a plurality of signal output pins are provided to the third edge portion, a plurality of between-element communication input pins are provided to the second edge portion, and a plurality of between-element communication output pins are provided to the fourth edge portion, respectively. A common signal is input to the first and second elements and a communication is performed between the first element and the second element. Loss of control function can be surely prevented while suppressing enlargement of the board and increase of development/production cost.
Abstract:
Circuit having a first printed circuit board and a second printed circuit board. In the circuit, the printed circuit boards spaced apart from one another by means of an air gap are mechanically connected together by at least one power semiconductor.
Abstract:
A printed wiring board has thereon an electronic component having a heat radiation pad, and an electrolytic capacitor provided for the electronic component. The printed wiring board further has thereon another electronic component having another heat radiation pad and exhibiting a higher heat value than that of the electronic component, and another electrolytic capacitor provided for the other electronic component. The heat radiation pad of the electronic component, a ground terminal of the electrolytic capacitor, the other heat radiation pad for the other electronic component, and another ground terminal of the other electrolytic capacitor are connected by using a ground conductor. In the ground conductor, a thermal resistance between the other heat radiation pad and other ground terminal is lower than the thermal resistance between the heat radiation pad and the ground terminal.
Abstract:
Some example forms relate to an electronic package. The electronic package includes a first dielectric layer that includes an electrical trace formed on a surface of the first dielectric layer and a second dielectric layer on the surface of the first dielectric layer. The second dielectric layer includes an opening. The electrical trace is within the opening. The electronic package includes an electrical interconnect that fills the opening and extends above an upper surface of the second dielectric layer such that the electrically interconnect is electrically connected to the electrical trace on the first dielectric layer.
Abstract:
A circuit board assembly includes a circuit board, at least one pad formed on the circuit board, and at least one connection line. Each of the at least one connection line includes a connection end connected to a respective one of the at least one pad and has the same resistance value as the respective pad.
Abstract:
Some example forms relate to an electronic package. The electronic package includes a first dielectric layer that includes an electrical trace formed on a surface of the first dielectric layer and a second dielectric layer on the surface of the first dielectric layer. The second dielectric layer includes an opening. The electrical trace is within the opening. The electronic package includes an electrical interconnect that fills the opening and extends above an upper surface of the second dielectric layer such that the electrically interconnect is electrically connected to the electrical trace on the first dielectric layer.
Abstract:
Schaltung mit einer ersten Leiterplatte (2a) und einer zweiten Leiterplatte (2b). Die erste Leiterplatte ist mit einer metallischen Trägerplatte (14) und einer die metallische Trägerplatte auf einer Oberfläche elektrisch isolierenden Isolationsschicht (8) versehen, wobei die Trägerplatte in zumindest einem Anschlussbereich (10a-10d) frei von der Isolationsschicht ist. Die Trägerplatte ist im Anschlussbereich metallisch beschichtet (12) und auf der metallischen Beschichtung des Anschlussbereichs ist ein Kontakt (30a) eines Halbleiters (30) elektrisch kontaktiert. Die zweite Leiterplatte ist mit einer metallischen Trägerplatte (2b), einen die metallische Trägerplatte (24) auf einer Oberfläche elektrisch isolierenden Isolator (16) und einer auf dem Isolator aufgebrachten Leitschicht (18) versehen. Der Isolator, sowie die Leitschicht sind in zumindest einem Kontaktbereich durchbrochen (21) un in dem Kontaktbereich ist zumindest ein metallisches Kontaktpad (20) auf der Trägerplatte derart angeordnet, dass das Kontaktpad umlaufend beabstandet dem Isolator und der Leitschicht ist. Bei der Schaltung sind die Leiterplatten voneinander durch einen Luftspalt (28) beabstandet und durch zumindest einen Leistungshalbleiter (30) mechanisch miteinander verbunden.
Abstract:
A printed circuit board for carrying high frequency signals. Conducting structures of the printed circuit board are shaped within breakout regions to limit impedance discontinuities in the signal paths between vias and conductive traces within the printed circuit board. Values of parameters of traces or anti-pads, for example, may be adjusted to provide a desired impedance. The specific values selected as part of designing a printed circuit board may match the impedance of the breakout region to that of the via. The parameters for which values are selected may include the trace width, thickness, spacing, length over an anti-pad or angle of exit from the breakout region.