Abstract: Methods and apparatus for creating independent circuit connections within a through-hole of a substrate are described. According to one aspect of the present invention, a method includes defining a through-hole in a substrate, applying a conductive plating to a holewall of the through-hole, and selectively removing at least a first area of the plating. The through-hole has a height relative to a first axis, and the perimeter of the through-hole at each point along the first axis is approximately the same. Selectively removing the first area of the plating includes defining second areas of the plating. At least one of the plurality of second areas does not span a height of the hole.

Abstract: Methods and apparatus for creating a filled, backdrilled plated through hole in a printed circuit board are disclosed. According to one aspect of the present invention, a method includes defining a hole in a printed circuit board panel. The hole has a first surface, and includes at least a first portion and a second portion. The method also includes plating the first surface with a conductive material, to create a plated surface, and removing at least a first area of the plated surface. The first area of the plated surface is associated with the second portion, and removing the first area of the plated surface includes expanding a size of the hole associated with the second portion. Finally, the method includes filling the hole with a non-conductive material.

Abstract: Methods and apparatus for creating independent circuit connections within a through-hole of a substrate are described. According to one aspect of the present invention, a method includes defining a through-hole in a substrate, applying a conductive plating to a holewall of the through-hole, and selectively removing at least a first area of the plating. The through-hole has a height relative to a first axis, and the perimeter of the through-hole at each point along the first axis is approximately the same. Selectively removing the first area of the plating includes defining second areas of the plating. At least one of the plurality of second areas does not span a height of the hole.

Abstract: Electrically resistive material including platinum and from about 5 and about 70 molar percent of iridium, ruthenium or mixtures thereof, calculated based on platinum as 100%, are disclosed.

Abstract: Electrically resistive material including platinum and from about 5 and about 70 molar percent or iridium, ruthenium or mixtures thereof, calculated based on platinum as 100%, are disclosed.

Abstract: Resistive materials have resistivities that are axis dependent are provided. Such resistive materials having a resistivity in a first direction and a very different resistivity in an orthogonal direction. These resistive materials are particularly suitable for use as resistors embedded in printed wiring boards.

Abstract: Electrically resistive material including platinum and from about 5 and about 70 molar percent of iridium, ruthenium or mixtures thereof, calculated based on platinum as 100%, are disclosed.

Abstract: Electrically resistive material including platinum and from about 5 and about 70 molar percent of iridium, ruthenium or mixtures thereof, calculated based on platinum as 100%, are disclosed.

Abstract: Resistive materials having resistivities that are axis dependent are provided. Such resistive materials having a resistivity in a first direction and a very different resistivity in an orthogonal direction. These resistive materials are particularly suitable for use as resistors embedded in printed wiring boards.

Abstract: Resistors having a resistive material portion including multiple layers or resistive materials, wherein each layer of resistive material has a different sheet resistivity, are provided by the present invention. Such resistors are particularly useful as embedded resistors in the manufacture of printed wiring boards. Methods of preparing such resistors are also provided.

Abstract: Resistive materials having a plurality of perforations are provided. Such resistive materials are useful in the manufacture of resistors. These resistors are particularly suitable for use as resistors embedded in printed wiring boards.