Abstract:
Radioactive integrated circuit (IC) devices with radioactive material embedded in the substrate of the IC itself, and including logic for “fingerprinting” (that is, determining characteristics that identify the source of the radioactive source material). Radioactive IC devices with embedded detector hardware that determine aspects of radioactivity such as total dose and/or ambient radiation. Radioactive IC devices that can determine an elapsed time based on radioactive decay rates. Radioactive smoke detector using man-made, relatively short half-life radioactive source material.
Abstract:
A structure fabrication method. An integrated circuit that includes N chip electric pads is bonded to a top side of an interposing shield that includes N electric conductors. N is at least 2. The interposing shield includes a shield material that includes a first semiconductor material. A bottom side of the interposing shield is polished, which exposes the N electric conductors to a surrounding ambient. The bonding includes bonding the integrated circuit to the top side of the interposing shield such that the N chip electric pads are in electrical contact and direct physical contact with corresponding electrical pads of the N electric conductors. The shield material covers the N electric conductors in a manner that the N electric conductors are not exposed to the surrounding ambient. The polishing removes a sufficient amount of the shield material to expose the N electric conductors to the surrounding ambient.
Abstract:
A system, method and computer program product for determining whether a material meets an alpha particle emissivity specification that includes measuring a background alpha particle emissivity for the counter and measuring a combined alpha particle emissivity from the counter containing a sample of the material. The combined alpha particle emissivity includes the background alpha particle emissivity in combination with a sample alpha particle emissivity. The decision statistic is computed based on the observed data and compared to a threshold value. When the decision statistic is less than the threshold value, the material meets the alpha particle emissivity specification. The testing times are computed based on pre-specified criteria so as to meet the needs of both Producer and Consumer.