Takanori Shimura

A 15 -- 15 mm, 1 μA, reliable sensor-net module: enabling application-specific nodes

An ultra-small, low-power sensor-net module called ZN1 is developed. ZN1 integrates MCU, ZigBee RF into an ultra-small 15times15-mm module with an ultra-low standby current less than 1 muA. The and highly reliable operation for more than 15 years of the ZN1 enable low-cost practical application-specific sensor nodes for HVAC, structure monitoring, office management, security, medicine, and healthcare. We describe architecture and technologies for developing the ZN1 module. Moreover, we demonstrate two applications that we developed simultaneously: food sanitation and home healthcare. We also show results of the ZN1 module evaluation and discuss reliability of the ZN1

A new assembly architecture for multichannel single mode-fiber-pigtail LD/PD modules

A novel assembly architecture is developed for alignment and soldering between single-mode (SM) fiber arrays and laser-diode/photodiode (LD/PD) arrays. The image position detection method, by eliminating degrees of freedom for alignment, improves assembly throughput to twice that of conventional assembly architecture. The thermal shrinkage compensation method achieves high-precision soldering by canceling misalignments due to thermal shrinkage of assembly equipment and solder volume. As a result, assembly, through all processes, achieves +or-1.5- mu m precision, which corresponds to a +or-1-dB fluctuation of coupling efficiency. Based on this architecture, eight-channel SM-fiber-pigtail LD/PD modules were successfully assembled.<<ETX>>

A 15/spl times/15 mm, 1 /spl mu/A, reliable sensor-net module: enabling application-specific nodes

Radiographic apparatus includes indicium means for indelibly imprinting computerized axial tomographs with identification data which relates to the position of the tomographic slice in relation to a fixed datum position such as the top of a patients head. The indicium comprises a member having characteristically varying radiopacity which is positioned in the vicinity of the radiographic slice so as to be scanned by the exploring radiation and is fixedly secured in relation to the datum position.