Abstract:
A stacking method and structure for attaching memory components to a ball grid array (BGA) device are provided. A specialized carrier includes multiple memory devices such as memory die, or chip scale packaging (CSP) memory. The specialized carrier is attached to a mating supporting carrier to form a stacked structure. The mating supporting carrier includes an associated ball grid array (BGA) device for the multiple devices of the specialized carrier.
Abstract:
A method and structure are provided for implementing enhanced electronic packaging and printed circuit board (PCB) layout. A diagonal via is formed at a selected angle between a first side and an opposite second side of a printed circuit board at a selected printed circuit board location. The diagonal via is plated with an electrically conductive material. Diagonal vias are used to interconnect between a high-density pitch on the first side and a larger pitch on the opposite second side of the printed circuit board. The diagonal vias can be used to selectively interconnect electrical patterns of selected layers and eliminate the use of blind and buried vias.
Abstract:
A method and structure are provided for implementing a column attach coupled noise suppressor for a solder column structure of the type used to join a substrate to a circuit card. The electrical noise suppressor structure includes a plurality of elongated through openings that are arranged in a predefined pattern. The elongated through openings have electrically conductive sidewalls and are electrically connected together. The predefined pattern of the elongated, electrically conductive through openings corresponds to a layout of solder columns. The solder columns are attached at one end to either a substrate or a circuit card and are inserted through the elongated through openings of the electrical noise suppressor structure, spaced apart from the electrically conductive sidewalls. Then the solder columns are attached at the other end to the other one of the substrate or circuit card.
Abstract:
A method and a probe structure are provided for implementing multiple signals probing of a printed circuit board. A probe structure is formed on an outside surface of the printed circuit board. A resistor is electrically connected with an associated via with a signal to be monitored. A path to a predefined probe location for monitoring the signal is defined from the resistor using the probe structure.
Abstract:
A multilayer reagent test strip measures the concentration of analyte in a liquid sample that is applied to it. The sample is guided to a number of assay areas arrayed along the strip, where the analyte can react with a reagent to cause a color change. Each assay area also includes an inhibitor for the color-change reaction. The inhibitor concentration increases in successive assay areas; thus, the number of areas that change color is a measure of the analyte concentration. The test strip is particularly adapted for measuring glucose in a whole blood sample. In a preferred embodiment, the sample is guided to the assay areas along a path formed by crushing selected areas of a membrane, and the assay areas are uncrushed areas of the membrane.