Non-refrigeration infrared detector array based on polysilicon PN junction and preparing method thereof
An uncooled infrared and detector array technology, applied in the field of infrared detectors, can solve the problems of inconvenience to carry, process incompatibility, and difficulty in miniaturization, and achieve the effects of improving detection sensitivity, avoiding adhesion problems, and reducing heat loss.
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[0027] The invention provides an uncooled infrared detector array based on the temperature characteristics of polysilicon PN junction, such as figure 1 As shown, it includes several infrared detection units arranged in sequence. Each of the infrared detection units, such as figure 2 , image 3 As shown, along the longitudinal direction, it includes: a bottom silicon layer 7 , a cavity 11 , a buried oxide layer 8 , and a top silicon layer region 9 above the buried oxide layer 8 .
[0028] The cavity 11 is surrounded by a deep trench 1, a buried oxide layer 8 and a bottom silicon layer 7;
[0029] The deep groove 1 is a lateral barrier layer between the infrared detection unit and other infrared detection units when the lateral bottom silicon is etched;
[0030] The buried oxide layer 8 is a vertical blocking layer that protects the top silicon layer and the infrared sensitive elements disposed in the top silicon layer from being etched during vertical bottom silicon etching...
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