Compensating pyroelectric infrared unit detector

Abstract

The invention discloses a compensating pyroelectric infrared unit detector belonging to the technical field of infrared detectors. The compensating pyroelectric infrared unit detector comprises a shell (1), and a window which is arranged at the head end of the shell, wherein an infrared filter (2), a base (3), pins (4), a double-sided circuit board (5), a field effect transistor (6), a pyroelectric infrared sensitive element (7), a pyroelectric compensation sensitive element (8) and a resistor (9) are arranged on the window; a through hole is formed in the center of the double-sided circuit board (5); the field effect transistor (6) is embedded in the through hole, and the bottom of the field effect transistor (6) is flush with the lower surface of the double-sided circuit board (5); the thickness of the field effect transistor (6) is smaller than the thickness of the double-sided circuit board (5); the pyroelectric infrared sensitive element (7) and the pyroelectric compensation sensitive element (8) are arranged above the through hole. The compensating pyroelectric infrared unit detector has the advantages of excellent performance, easiness in manufacturing, low production cost, high production efficiency and wide application range.

Description

technical field [0001] The invention belongs to the technical field of infrared detectors, in particular to a pyroelectric infrared detector. Background technique [0002] Pyroelectric infrared detectors are an important class of infrared detectors. They have the characteristics of fast response, high detection rate, no refrigeration, simple production, and convenient use. They are widely used in the fields of industry, agriculture, military, environment, and medical treatment. application prospects. Among them, the pyroelectric infrared unit detector is a typical representative of this type of product, which is widely used in products such as anti-theft alarms, night monitors and automatic door switches, but the unit detectors at this stage have poor performance, Disadvantages such as high cost, low reliability and production efficiency: For example, in order to ensure that the photoelectric sensor has good thermal insulation performance, a large number of pyroelectric inf...

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Problems solved by technology

Among them, the pyroelectric infrared unit detector is a typical representative of this type of product, which is widely used in products such as anti-theft alarms, night monitors and automatic door switches, but the unit detectors at this stage have poor performance, Disadvantages such as high cost, low reliability and production efficiency: For example, in order to ensure that the photoelectric sensor has good thermal insulation performance, a large number of pyroelectric infrared unit detectors use a separate support column to fix the photoelectric sensor.

This approach undoubtedly complicates the process and reduces the reliability and production efficiency of the product; in order to improve the utilization of the internal space of the detector, some products use smaller, unpackaged field effect transistor wafers instead of larger ones. , encapsulated field effect transistor

This method puts forward higher requirements on the production equipment and increases the production cost

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