Abstract:
A shielding assembly is configured to provide electromagnetic shielding and environmental protection to one or more electronic components coupled to a substrate. The shielding assembly includes a non-conductive mold compound layer, such as a dielectric epoxy. The mold compound layer is applied to a top surface of the substrate, thereby covering the electronic components and providing protection against environmentally induced conditions such as corrosion, humidity, and mechanical stress. The shielding assembly also includes a conductive layer applied to a top surface of the mold compound layer. The conductive layer is coupled to a ground plane in the substrate, thereby enabling the electromagnetic shielding function. The conductive layer is coupled to the ground plane via one or more metallized contacts that are coupled to the substrate and extend through the mold compound layer.
Abstract:
Multiple small conductive and flexible hollow rings (10), each of which is made from a pliable material, provide a flexible connection medium for use between a substrate (8) and a microelectronic device package (4). Each ring is soldered to both the substrate and the device. A portion (20, 22) of the sidewall of each ring is not soldered thus insuring that at least part of the ring stays flexible. The rings accommodate elevation differences on a substrate and electronic device package. They also provide a vibration resistant and flexible joint.
Abstract:
A piezoelectric oscillator which has a piezoelectric oscillator packaged with column members fixed on a wiring board for mounting electronic components constituting an oscillation circuit or a temperature compensation circuit, removes a variation in dimensions of the support member or a wrong placement of column members during reflow, and shows a high reliability and an excellent working efficiency. This oscillator is a quartz oscillator comprising a wiring board which mounts electronic components constituting an oscillation circuit and a temperature compensation circuit on a land on the top and has an external electrode and a quartz oscillator fixed with a predetermined gap via column members fixed on the top of the wiring board. This oscillator has the bottom electrode of the column member electromechanically fixed to a column member fixing pattern formed on the top of the wiring board, and the upper electrode of the column member electromechanically fixed to the bottom electrode of the quartz oscillator.
Abstract:
Disclosed is a method which is used to simplify the contacting of printed circuit boards to a support which is preferably embodied as a cockpit module in a motor vehicle. According to the inventive method, the printed circuit board is initially connected to the conductors which are disposed on the support, whereby (preferably) various conductors arranged inside said vehicle are electroconductively connected to each other.