Abstract:
Provided herein are devices comprising a printed wiring board that comprise, singulated capacitors fabricated from known good, thin-film, fired-on-foil capacitors. Provided are methods of incorporating the singulated capacitors into the build-up layers of a printed wiring board to minimize impedance. The singulated capacitors have a pitch that allows each power and ground terminal of an IC to be directly connected to a power and ground electrode, respectively, of its own singulated capacitor. Using a feedstock of known good, fired-on-foil capacitors allows for improved PWB yield.
Abstract:
In one embodiment, a laminated printed circuit board translator (100) is provided. In some embodiments, the translator includes a receiving board (110) adapted to receive a pin (55) , the receiving board includes a plated via (120) extending through the receiving board and has a hole (125) for receiving the pin. An interface board (130) laminated with the receiving board has a controlled depth via (160) extending through it to contact a conductive trace (140) . The conductive trace extends between the receiving board and the interface board to connect the plated via of the receiving board with the controlled depth via of the interface board. The controlled depth via is configured so that it is capable of being plated through a single sided drilled opening in the interface board. Some embodiments have a pad on the interface board connected to the controlled depth via.
Abstract:
This invention relates to a method for forming device-landing pad of multi-layered PCB, and more particularly, to a method for foring device-landing pad of a multi-layered PCB by plugging a via hole formed by laser drilling for device-landing and/or forming a via and conductive layer. In order to achieve the objects of the present invention, the method for forming device-landing pad of multi-layered PCB including the step of forming at least one via hole for interconnecting different conductive layer patterns, the method comprising the steps of: forming a first external conductive layer over the a surface of the multi-layered PCB having the via hole; forming a via by plugging the via hole; forming masking layer over a surface of the conductive layer; etching back the first external conductive layer for forming conductive pattern; and removing the masking layer.
Abstract:
A multilayer wiring board (6) manufactured at low cost comprises an insulating sheet(1) having a through hole (100) and a thin−film wiring layer (2) formed on the insulating sheet. The board has a high reliability, and a high−density wiring can be provided on the board. A through hole is made in a glass sheet (1) by sand blasting, a wiring pattern (120) and an interlayer insulating layer (110) are formed on the glass sheet, and the through hole is filled with a plating wiring or a conductive material (101), thus fabricating a multilayer wiring board.
Abstract:
A low-EMI circuit which realizes a high mounting density by converting the potential fluctuation of a power supply layer with respect to a ground layer which occurs on switching an IC device etc., into Joule's heat in the substrate without using any parts as a countermeasure against the EMI. Its structure, a circuit board using it, and a method of manufacturing the circuit board are also disclosed. Parallel plate lines in which the Q-value of the stray capacitance between solid layers viewed from the power supply layer and ground layer is equivalently reduced and which are matchedly terminated by forming a structure in which a resistor (resistor layer) and another ground layer are provided in addition to the power supply layer and the ground layer on a multilayered circuit board. A closed shield structure is also disclosed. This invention can remarkably suppress unwanted radiation by absorbing the potential fluctuation (resonance) which occurs in a power supply loop by equivalently reducing the Q-value of the stray capacitance, absorbing the standing wave by the parallel plate lines matchedly terminated and, closing and shielding the parallel plate lines.
Abstract:
Electronic circuits (1, 101) are disclosed. The electronic circuits comprise a first and a second integrated circuit (10a, 110a, 10b, 110b) and a printed circuit board (PCB) (15, 115). The PCB comprises dielectric layers (30a-c, 130) of polymer-based materials having different dissipation factors arranged in accordance with various embodiments for suppressing noise.