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Refrigeration detector and its cold plate

A technology of detectors and detector chips, which is applied in the direction of electric radiation detectors, instruments, and measuring devices, can solve the problems of limited improvement effect and difficulty in guaranteeing the reliability of infrared detector switch machines, etc., so as to shorten the cooling time and improve Reliability of switching on and off, effect of reducing workload

Active Publication Date: 2021-07-30
WUHAN GAOXIN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the stress and strain of the chip under the huge temperature difference are mainly relieved by selecting the ceramic substrate and the cold plate material whose thermal expansion coefficient matches the chip as much as possible, but the improvement effect is limited, and the reliability of the infrared detector switch is difficult to be guaranteed.

Method used

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  • Refrigeration detector and its cold plate
  • Refrigeration detector and its cold plate
  • Refrigeration detector and its cold plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 and figure 2 , the embodiment of the present invention provides a cold plate 1 for refrigeration detectors, including a cold plate body 11, the middle part of the cold plate body 11 has a cold finger component installation area 112, the cold plate body 11 is a square plate, and At least one of the side portions is designed with a slot 111 , and the slot 111 is recessed from the corresponding side portion to the side where the cold finger component mounting area 112 is located.

[0025] The specifications of the above-mentioned cold plate body 11 are generally decided according to the size of the detector chip; There is a peripheral cooling area, and the peripheral cooling area generally surrounds the cold finger component installation area 112. For the case where the cold finger component installation area 112 is circular, the center of the cold finger component installation area 112 is preferably the same as the cold plate body 11 centers coincide. In...

Embodiment 2

[0032] An embodiment of the present invention provides a refrigeration detector, including a detector chip and a refrigerator, the refrigerator includes a cold finger part 2, and also includes the cold plate 1 for the refrigeration detector provided in the first embodiment above, the refrigerator The finger part 2 is mounted on the cold finger part installation area 112 , and the detector chip is mounted on the other side surface of the cold plate body 11 .

[0033] Among them, the detector chip is a conventional device in the field; it is generally equipped with a ceramic substrate, and the ceramic substrate is mounted on the cold plate body 11 as a transition piece for electrical signal extraction, and the detector chip is mounted on the ceramic substrate as a core device.

Embodiment 3

[0035] The embodiment of the present invention provides a cold finger component 2, which can be used in the second embodiment above to provide the required cooling capacity for the operation of the detector chip.

[0036] like image 3 , the cold finger part 2 includes a mandrel 22, a cold finger 21, a flange 24 and a heat exchange tube 23, the heat exchange tube 23 is provided with a throttling part, and the cold finger 21 is sleeved on the mandrel 22 and between the mandrel 22 to form an expansion chamber, the heat exchange tube 23 is wound on the outer wall of the mandrel 22 and communicates with the expansion chamber through the throttling part, the method The flange 24 is connected to the cold finger 21 and closes the expansion chamber, and the flange 24 is provided with an air intake passage communicated with the heat exchange tube 23 and an exhaust passage 27 communicated with the expansion chamber. Among them, the mandrel 22 and the cold finger 21 are conventional com...

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Abstract

The invention relates to a cold plate used for a refrigeration detector, comprising a cold plate body, the middle part of the cold plate body has a cold finger part installation area, the cold plate body is a square plate, and at least one of the sides is designed with a slot, the slot Concave from the corresponding edge to the side where the cold finger component installation area is located. In addition, it also relates to a refrigeration detector using the above-mentioned cold plate. The invention adopts a square cold plate body and hollows out the edges of the cold plate body to a certain extent, and increases the constraint effect on the stress and strain of the detector chip through the corners of the cold plate, which can effectively reduce the temperature difference of the detector chip. The stress and strain generated under the environment can reduce the internal stress of the detector chip, ensure the photoelectric performance of the detector chip, and improve the reliability of the cooling detector switch; at the same time, it can reduce the thermal mass of the cold plate and reduce the work of the refrigerator. load, shorten the cooling time of the cooling detector, and correspondingly improve the working performance of the cooling detector.

Description

technical field [0001] The invention belongs to the technical field of refrigeration detectors, and in particular relates to a cold plate used for a refrigeration detector and a refrigeration detector using the cold plate. Background technique [0002] The infrared cooling detector is mainly composed of two parts, the Dewar and the refrigerator. The chip, as the core device of the infrared detector, is packaged inside the Dewar. interface; the refrigerator provides an extremely low working environment temperature (liquid nitrogen temperature 78K or even lower) for the detector chip to work. [0003] The typical fixing method of the detector chip in the Dewar is: the ceramic substrate is mounted on the cold plate as a transition piece for the electrical signal, and the chip is mounted on the ceramic substrate as the core device. Due to the special temperature requirements of the infrared cooling detector chip, the chip needs to withstand the stress and strain caused by the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/02G01J5/06G01J5/10
CPCG01J5/0205G01J5/061G01J5/10
Inventor 张丽芳洪晓麦沈星王立保
Owner WUHAN GAOXIN TECH
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