An Oxide over Titanium metal resistance bolometer technology developed by NMRC (Ireland) has been transferred to the X-FAB UK CMOS foundry at Plymouth, UK. Prototypes of the bolometers have been manufactured in the X-FAB production facility and tests show performance comparable with the NMRC prototypes. The bolometer design has been integrated with a CMOS read-out chip and the first wafers are currently being packaged for evaluation. The development of a low cost thermal imaging camera using the detector is under way. We present an overview of the detector and camera design, together with preliminary results from the detector test programme. The work is partly funded by the European Union IST programme.
The major defence systems companies have been expending considerable effort on the development of thermal imaging and sensing systems technologies for use in the military field for many years. Major efforts have been made to spin-off low cost variants of the technology into the civil market sector with varying degrees of success. IRISYS have approached the civil market opportunity from a different perspective. The company has developed an inherently low cost technology with the objective of achieving a low cost imaging sensor. The achievement of the low price for civil sensing applications is by use of a detector technology that is optimized for the very high volume detection market. The paper reviews the detector technology, design methodologies and implementation of low cost thermal detection and imaging products.
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