Abstract:
The present invention relates to a device comprising a power core wherein said power core comprises: at least one embedded singulated capacitor layer containing at least one embedded singulated capacitor; and at least one planar capacitor laminate; wherein said planar capacitor laminate serves as a low inductance path to supply a charge to said at least one embedded singulated capacitor; and wherein said at least one embedded singulated capacitor is connected in parallel to at least one of the said planar capacitor laminates; and wherein said power core is interconnected to at least one signal layer.
Abstract:
A printed wiring board semiconductor package or PWB power core comprising singulated capacitors embedded on multiple layers of the printed wiring board semiconductor package wherein at least a part of each embedded capacitor lies within the die shadow and wherein the embedded, singulated capacitors comprise at least a first electrode and a second electrode. The first electrodes and second electrodes of the embedded singulated capacitors are interconnected to the Vcc (power) terminals and the Vss (ground) terminals respectively of a semiconductor device. The size of the embedded capacitors are varied to produce different self-resonant frequencies and their vertical placements within the PWB semiconductor package are used to control the inherent inductance of the capacitor-semiconductor electrical interconnections so that customized resonant frequencies of the embedded capacitors can be achieved with low impedance.
Abstract:
The present invention relates to a power core comprising: at least one embedded surface mount technology (SMT) discrete chip capacitor layer comprising at least one embedded SMT discrete chip capacitor; and at least one planar capacitor laminate; wherein at least one planar capacitor laminate serves as a low inductance path to supply a charge to at least one embedded SMT discrete chip capacitor; and wherein said embedded SMT discrete chip capacitor is connected in parallel to said planar capacitor laminate.
Abstract:
Thick-film capacitors are formed on ceramic interconnect substrates having high capacitance densities and other desirable electrical and physical properties. The capacitor dielectrics are fired at high temperatures.
Abstract:
Disclosed are methods of making multi-element, finely divided, metal powders containing one or more reactive metals and one or more non-reactive metals. Reactive metals include metals or mixtures thereof from titanium (Ti), zirconium (Zr), hafnium (Hf), tantalum (Ta), niobium (Nb), vanadium (V), nickel (Ni), cobalt (Co), molybdenum (Mo), manganese (Mn), and iron (Fe). Non-reactive metals include metals or mixtures such as silver (Ag), tin (Sn), bismuth (Bi), lead (Pb), antimony (Sb), zinc (Zn), germanium (Ge), phosphorus (P), gold (Au), cadmium (Cd), berrylium (Be), tellurium (Te).
Abstract:
Innerlayer panels are provided with high density fiducials during manufacture. The fiducials can be identified using X-rays without etching away portions of the innerlayer panel to expose the fiducials.
Abstract:
A capacitive/resistive device provides both resistive and capacitive functions. The capacitive/resistive device may be embedded within a layer of a printed wiring board. Embedding the capacitive/resistive device conserves board surface real estate, and reduces the number of solder connections, thereby increasing reliability. Conserves board surface real estate, and reduces the number of solder connections, thereby increasing reliability.
Abstract:
A capacitor structure is fabricated by forming a pattern of first dielectrics over a foil, forming first electrodes over the first dielectrics, and co-firing the first dielectrics and the first electrodes. Co-firing of the dielectrics and the electrodes alleviates cracking caused by differences in thermal coefficient of expansion (TCE) between the electrodes and the dielectrics. Co-firing also ensures a strong bond between the dielectrics and the electrodes. In addition, co-firing allows multi-layer capacitor structures to be constructed, and allows the capacitor electrodes to be formed from copper.
Abstract:
Dielectric powder and thick-film paste compositions are formed having high dielectric constants, low loss tangents, and other desirable electrical and physical properties. Conductive powder and paste compositions are formed having desirable electrical and physical properties. The dielectric powder and thick-film paste compositions can be used in combination with the conductive powder and paste compositions to form capacitors and other fired-on-foil passive circuit components.
Abstract:
Disclosed are methods of making a dielectric on a metal foil, and a method of making a large area capacitor that includes a dielectric on a metal foil. A first dielectric layer is formed over the metal foil by physical vapor deposition, and a dielectric precursor layer is formed over the first dielectric layer by chemical solution deposition. The metal foil, first dielectric layer and dielectric precursor layer are prefired at a prefiring temperature in the range of 350 to 650° C. The prefired dielectric precursor layer, the first dielectric layer and the base metal foil are subsequently fired at a firing temperature in the range of 700 to 1200° C.