Abstract:
The present invention relates to a two-level mounting board in which a second substrate is supported horizontally by a metal pin above a first substrate having a mounting electrode on an outer base surface, the free, lower end of the metal pin is inserted in a hole provided in the surface of the first substrate, and the metal pin is affixed by solder to an annular electrode land provided on the surface of the first substrate to form an outer periphery of the hole, wherein part of the ring of the annular electrode land is cut away to open the same. This provides a two-level mounting board in which metal pins can be connected reliably to the first substrate to support the second substrate horizontally, and a crystal oscillator using the same.
Abstract:
Vias (106) are typically of a lower impedance than the signal lines (102, 128) connected to them. The noise and reflected signals resulting in impedance mismatch may require circuits to be operated at a frequency far lower than desired. An embodiment avoids impedance mismatch in circuits and achieves an advance in the art by providing a via (106) with higher impedance through the addition of split ring resonators (104, 112, 120, 126) to each end of the via (106).
Abstract:
Es wird ein Anschlussträger (1) angegeben, der zumindest eine Aussparung (30) für eine Befestigung des Anschlussträgers (1) an einem Montageträger (61) und zumindest zwei elektrisch voneinander isolierte Kontaktflächen (20) aufweist, angegeben. Die Kontaktflächen sind dafür vorgesehen, bei der Befestigung des Anschlussträgers (1) mittels eines sich durch die Aussparung (30) hindurch erstreckenden Befestigungsmittels (51) elektrisch leitend miteinander verbunden zu werden. Weiterhin wird eine Bauelementanordnung (4) mit einem Anschlussträger (1) und eine Beleuchtungsvorrichtung (6) mit einer Bauelementanordnung (4) angegeben.
Abstract:
A power signal transmission structure and a design method are provided. The power supply signal transmission structure is adapted for a circuit board having a first surface and a second surface opposite to the first surface, and the power signal transmission structure includes a first power electrode, a second power electrode, and a plurality of vias. The first power electrode is disposed on the first surface and has a plurality of power pad regions for receiving a power signal. The second power electrode is disposed on the second surface. The vias penetrate the circuit board to electrically connect the first power electrode and the second power electrode. The vias are arranged in accordance with the current direction of the power signal to balance the current received by the vias.
Abstract:
The present invention is to provide a printed wiring board which can certainly prevent damage of conductive pattern caused by the terminal. The printed wiring board has a board, a conductive pattern, a through-hole and a non-conductive area. A lead wire of resistance mounted on the printed wiring board is inserted into the through-hole 4. The lead wire projects from a surface of the board, and is bent close to the surface. The non-conductive area is formed into a fan-shaped shape enlarging toward a tip of the lead wire from a center of the through-hole. Since the bent lead wire is arranged on the non-conductive area, the non-conductive area can prevent damage of the conductive pattern which is caused by touching the lead wire to the conductive pattern.
Abstract:
PROBLEM TO BE SOLVED: To reduce crosstalk noise occurring between signal wiring lines.SOLUTION: In a first conductor layer 101, first and second signal wiring patterns 111 and 112 are formed. In a second conductor layer 102 that is a surface layer, a first pad 121 electrically connected to the first signal wiring pattern 111 through the first via 131 and a second pad 122 electrically connected to the second signal wiring pattern 112 through a second via 132 are formed. A third conductor layer 103 is disposed between the first conductor layer 101 and the second conductor layer 102, and an insulator 105 is interposed among the conductor layers. In the third conductor layer 103, a first via pad 141 electrically connected to the first via 131 is formed. The first via pad 141 is overlapped with the second pad 122 as viewed from a direction perpendicular to a substrate surface 100a, and has a facing portion 141a that faces the second pad 122 via the insulator 105.