Electronics, spreading resistance system

Figure 2 shows a typical automatic spreading resistance system. It consists of a mechanical apparatus to operate the probes and step them across a bevelled test chip and an electronics sub-system to acquire, process and plot the data. 

Introduction. Transient spreading resistance occurs during startup and is important in certain micro-electronic systems. The spreading resistance can be defined with respect to the area-average temperature as a single point temperature such as the centroid. Solutions have been reported for isoflux contact areas on half-spaces, circular contact areas on circular flux tubes, and strips on channels. 

The electronics of CUORICEMO (see Section 16.6) consists of a complex anticoincidence system. One would hope that signals from all detectors had the same amplitude and shape for the same input. For this reason, all the components for the 56 detectors were carefully selected to be equal. Also the mounting of the components was made with the most reproducible technique. Nevertheless, there are some parameters such as the contact resistances between the thermistors and the absorbers and especially those between the absorbers and the frame which show a wide spread in their values. 

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