Abstract:
A printed circuit board with embedded electronic components and fabrication method thereof are disclosed. The printed circuit board with embedded electronic components having outer electrodes comprising a substrate on which insertion holes are formed for containing the electronic components, a filler for filling the gap between the electronic component and the insertion hole to secure the electronic components, and attachment layers laminated onto the substrate in contact with the electrodes, with circuits formed on the attachment layers, may provide superior electrical reliability, as the outer electrodes of the electronic components are in contact with the attachment layers, and may reduce fabrication cost and time, as it is not necessary to form via holes.
Abstract:
In the direct current cut structure of the present invention, two capacitors are provided in parallel between signal transmission line patterns facing each other on a substrate, and each of the two capacitors is electrically connected to each surface of each transmission line pattern that is exposed through a hole part provided on the substrate. It is preferable for the two capacitors to have different capacity. If there is no need to cover such a broad band, only one capacitor can also connected to either side of each transmission line pattern exposed through the hole part.
Abstract:
An electrical connector for connecting a power source with a load wherein the connector has a pair of conducting members interconnecting the power source with the load and having insert apparatus inserted between the pair of conducting members and separated from inner surfaces thereof by dielectric material wherein the insert apparatus reduces the inductance of the connector by reducing a magnetic field between the pair of conducting members generated by current flow in the conductors and stores electrical energy within the connector.
Abstract:
A thermistor with positive resistance-to-temperature characteristic used in a overcurrent protection circuit has electrodes on mutually opposite main surfaces and is mounted to a substrate having electrically conductive members such that deterioration of its voltage resistance due to heat emission can be controlled. A spacer with smaller thermal conductivity than the substrate and penetrated by a conductor piece with a small cross-sectional area is inserted between solder materials connecting to one of the thermistor electrodes. The other electrode is contacted by an elongated connecting member through its sectional surface transverse to its longitudinal direction such that the cross-sectional area of electrical conduction is reduced.
Abstract:
A multiterminal multilayer ceramic capacitor having a capacitor body comprised of first internal electrodes and second internal electrodes alternately stacked via rectangular ceramic layers so that the short sides of the ceramic layers register with the height direction of the capacitor body. First external terminals and/or second external terminals connected to the first internal electrodes and/or second internal electrodes are formed on a top face and bottom face of the capacitor body. The first external terminals and second external terminals are connected directly to different circuit patterns of the circuit board so as to enable three-dimensional mounting of the multilayer ceramic capacitor with circuit boards.
Abstract:
There is disclosed herein a spring battery retainer that is used to secure a small "coin" or "button" battery to a printed circuit (PC) card or the like. Use of the spring battery retainer provides for positive location of the battery, inexpensive electrical contacts for the battery terminals and positive spring compression that is necessary to insure hard contact with the cathode and the anode terminals of the battery. The battery is easily installed and removed by slightly lifting one end of the battery retainer and sliding the battery in or out. A bend in the spring battery retainer provides sufficient hold-down pressure so that the battery makes reliable contact with an electrical pad located on a PC board. The spring battery retainer is inserted into the PC card and then soldered to it in much the same way as a standard electrical component such as a resistor. The dimensions of the spring battery retainer can be varied so that coin or button batteries of various sizes can be securely fastened to a PC card.
Abstract:
A construction for mounting plate-like electric parts within insertion holes formed in a printed circuit board is described which has additional holes for releasing any gases formed by soldering the parts to the printed circuit board. These additional holes are formed contiguous with said insertion holes at positions spaced away from any electrodes of the plate-like electric parts.