Abstract:
Method for screen printing a continuous structure on a substrate wherein the screen printed structure extends from at least a first level to at least a second level. The disclosed method is particularly suitable for the fabrication of microelectronic devices and components thereof including the fabrication of field emission display devices. Preferably, a print screen of a preferred thickness having a preconfigured print pattern formed therethrough, in combination with a squeegee having a hardness within a preferred range, are used to force a screen printable substance onto a substrate while maintaining a portion of the print screen within a preferred reference angle. The resulting screen printed structure extends from at least one lower level to at least one upper level in a continuous “uphill” manner. The disclosed method is particularly suitable for forming continuous electrically conductive structures or circuit traces extending from a lower level of a substrate, such as an anode plate of an FED device, up onto at least one second surface vertically distanced from the substrate. The electrically conductive structure may optionally terminate into a specifically configured contact pad for accommodating complimentary contacting structures located on a mating component, such as a cathode plate of an FED device.
Abstract:
The cost and complexity of an electronic pressure sensitive transducer are decreased by constructing such a transducer directly on a printed circuit board containing support electronics. Conductive traces are formed on the printed circuit board to define a contact area. A flexible substrate having an inner surface is positioned over the contact area. An adhesive spacer, substantially surrounding the contact area, attaches the flexible substrate to the printed circuit board. At least one resistive layer is deposited on the flexible substrate inner surface. In use, the resistive layer contacts at least two conductive traces in response to pressure applied to the flexible substrate to produce an electrical signal indicative of applied pressure.
Abstract:
A compression connector (10) comprises an insulation sheet (11) having a plurality of retention holes, a plurality of elastic contacts (12) provided in the retention holes to make elastic contact with a pair of boards (20) and (30) and a printed line (13) provided on at least one face of the insulation sheet (11) to connect the elastic contacts (12).
Abstract:
Solder balls are mounted on electrodes with an active resin therebetween. The solder is heated and melts to be connected to pads of an LSI chip, thereby forming solder bumps on the chip. In a method of forming bumps, a method of mounting flip chips, and a mounting structure, by the use of the active resin, a flux washing process can be eliminated and at the same time, an assembly cost can be minimized.
Abstract:
The present invention relates to multi-layer ceramic packaging of hybrid micro-electronic devices, including those for implantable medical devices. The invention permits size reduction and design simplification in such packaging by eliminating the need for electrolytic or electroless plating, and by eliminating or substantially eliminating the shrinkage variation typically associated with surface metallization techniques.
Abstract:
A process of forming a multi-layer feature on a ceramic or organic article in which first and second layers of paste are sequentially screened through a screening mask wherein the screening mask has not been moved between screening steps. A structure produced by this process is also disclosed.
Abstract:
A circuit board with protrusions at desired locations on a wiring pattern that on the surface of the board. The protrusions are made of the same conductive material used in the wiring pattern, and formed unitarily and simultaneously with the wiring pattern. Conductive material is filled into grooves having different depths and formed on a film. The filled conductive material is transferred onto the board, and then fired. Thus the circuit board is manufactured. Semiconductor devices and general-purpose components are mounted on the circuit board, whereby a semiconductor device can be manufactured with high reliability and at an inexpensive cost.
Abstract:
A solder structure for a surface mounting type semiconductor chip package, and a method of fabricating the same are disclosed. The surface mounting type semiconductor chip package includes a package body having an interconnection formed therein and a semiconductor chip accommodated therein, and a plurality of double layer bumps each attached to the bottom of the package body as an external connection terminal.
Abstract:
A method of forming electrically conductive pillars on a printed circuit board by providing a printed circuit board having a plurality of electrical traces and forming a plurality of elongate, electrically conductive pillars of superimposed layers of solder and conductive polymer on the printed circuit board. The elongate, electrically conductive pillars are connected by a first end to the electrical traces of the printed circuit board and extend substantially perpendicularly from the printed circuit board such that a second end of each of the plurality of elongate, electrically conductive pillars lies in substantially a common plane which is substantially perpendicular to and above said printed circuit board.
Abstract:
The present invention relates to multi-layer ceramic packaging of hybrid micro-electronic devices, including those for implantable medical devices. The invention permits size reduction and design simplification in such packaging by eliminating the need for electrolytic or electroless plating, and by eliminating or substantially eliminating the shrinkage variation typically associated with surface metallization techniques.