SOI pixel detector based on CMOS time-compression charge-injection
Concept and experimental results obtained from a pixel detector based on CMOS time-compression charge- injection-devices (TC-CID) with a huge internal photocurrent amplification (-104), fabricated in CMOS silicon-on-insulator (SOI) technology are presented. Here, the readout circuitry is fabricated on highly-doped, 200 nm thick SOI film, while the photogate (PG) detector is fabricated on higher-resistivity handle wafer. The latter, together with the 30 V biasing possibilities enhances the quantum efficiency, especially for irradiations with wavelengths in the near-infra-red (NIR) part of the spectra.
Theoretical modeling and experimental investigation of MIS radiation sensor with giant internal signal amplification
Abstract Theoretical model, experimental investigation and a discussion of novel, extremely simple metal–insulator–semiconductor (MIS) capacitor-based integrating photodetectors are presented. These sensors can be used both, as high-speed photometers and weak radiation source sensors with a giant internal amplification of an input signal. Theoretical modeling explains the giant value of the internal signal amplification (of order of 10 6 ), defined as the ratio of the readout current peak value and the instantaneous photo current mean value. The samples are fabricated on both, high resistive (2–5 kΩ cm) n-type (1 0 0) silicon substrate and on ultra high resistive (UHR) epitaxial ( Epi ) layer ( ρ >10 kΩ cm) on highly doped ( ρ ≈0.01 Ω cm) (1 1 1) n-type silicon substrate wafers. The fabrication process is completely compatible with the standard C-MOS.
Time and Heritage
As a historian studying what can be considered a form of intellectual history, I have slowly come to adopt Michel de Certeau’s observation made at the end of the 1980s that ‘objectifying the past, for the last three centuries, has undoubtedly left unconsidered time within a discipline that has continued to use it as a taxonomic instrument’. To a certain degree, time has become commonplace for the historian who has preserved or instrumentalized it. It is not considered because it is inconceivable, but because we do not think of it or, more simply, we do not think about it. As a historian attempting to pay attention to the time I’m living in, I have thus, like many others, noticed the swift development of the category of the present until it has become obvious that the present is omnipresent. This is what I refer to here as ‘presentism’.