Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Scintillation screen structure for X-ray radiation detector

A radiation detector and scintillation screen technology, which is applied in the field of X-ray detectors, can solve the problems of reduced image resolution, poor effect, and low packaging process efficiency, and achieves improved reflectivity, excellent light transmittance, and excellent water resistance. The effect of waterproof performance

Active Publication Date: 2015-06-10
SHENZHEN BASDA MEDICAL APP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cesium iodide is a hygroscopic material. When it absorbs moisture in the air and deliquesces, the characteristics of the scintillator, especially the image resolution, will be greatly reduced. Therefore, how to effectively package the scintillator is even more important.
However, the packaging process efficiency of the X-ray scintillation screen in the prior art is low, and the effect is not good.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The X-ray radiation detector described in this embodiment uses a scintillation screen structure, and the substrate is polysilicon; a cesium iodide hybrid film is deposited on the polysilicon substrate by a laser evaporation process, and the cesium iodide hybrid film is doped A cesium iodide thick film doped with thallium and boron; and a transparent water-blocking film deposited on the cesium iodide thick film. The process of the laser evaporation is as follows: 99wt% CsI crystal powder, 0.98wt% TaI crystal powder and 0.02wt% B 2 o 3 After it is mixed evenly, it is pressed into a thin sheet as a target material; then a Nd:YAG laser is used, and the laser pulse power of the Nd:YAG laser is 10 7 W / cm 2 , the frequency is 2000Hz, the pulse width is 100ns, the scanning speed is 5-10 cm / s, the distance between the substrate and the target is 72.5 cm, the deposition temperature is 350°C, and the thickness of the deposited cesium iodide hybrid film is 0.5mm, where doped wi...

Embodiment 2

[0016] The X-ray radiation detector described in this embodiment uses a scintillation screen structure, and the substrate is polysilicon; a silicon dioxide transition layer is first deposited on the polysilicon substrate, and the silicon dioxide transition layer is deposited by a magnetron sputtering process , the conditions of the magnetron sputtering process are as follows: the target material is silicon dioxide; the sputtering gas is O 2 and Ar, O 2 The volume ratio of Ar and Ar is 1:5; the sputtering power density is 500 W, and the pressure of sputtering gas is 5×10 -3 Torr, the silicon substrate temperature is 80°C, and the deposition thickness is 200 nm. Then a cesium iodide hybrid film is deposited by a laser evaporation process, and the cesium iodide hybrid film is a cesium iodide thick film doped with thallium and boron; and a transparent water-blocking film is deposited on the cesium iodide thick film membrane. The process of the laser evaporation is as follows:...

Embodiment 3

[0018] The X-ray radiation detector described in this embodiment uses a scintillation screen structure, and the substrate is polysilicon; a silicon dioxide transition layer is first deposited on the polysilicon substrate, and the silicon dioxide transition layer is deposited by a magnetron sputtering process , the conditions of the magnetron sputtering process are as follows: the target material is silicon dioxide; the sputtering gas is O 2 and Ar, O 2 The volume ratio of Ar and Ar is 1:5; the sputtering power density is 300 W, and the pressure of sputtering gas is 3×10 -3 Torr, the silicon substrate temperature is 100°C, and the deposition thickness is 100 nm. Then, a cesium iodide hybrid film is deposited by a laser evaporation process, which is a cesium iodide thick film doped with thallium and boron; the process of the laser evaporation is as follows: 99wt% of the CsI crystal powder, 0.95wt% TaI crystal powder and 0.05wt% B 2 o 3 After it is mixed evenly, it is presse...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a scintillation screen structure for an X-ray radiation detector. The scintillation screen structure comprises a silicon substrate. A cesium iodide hybrid film is deposited on the silicon substrate through the laser evaporation process. The cesium iodide hybrid film is a cesium iodide thick film doped with thallium and boron. A transparent water blocking film is deposited on the cesium iodide thick film. The visible light transmittance of the transparent water blocking film is larger than or equal to 90%. The water vapor transmittance of the transparent water blocking film is smaller than or equal to 0.01g / m<-2>.day<-1>. The scintillation screen structure for the X-ray radiation detector is compact, even in component and good in cohesiveness with the substrate, and has good water blocking and waterproof performance.

Description

technical field [0001] The invention belongs to the technical field of X-ray detectors, and more specifically, the invention relates to a scintillation screen structure for X-ray radiation detectors. Background technique [0002] Since X-rays were discovered by Roentgen, with the advancement of research, its uses have become more and more extensive, from the initial X-ray photosensitive photos to later X-ray photodetection devices, from aerospace to high-energy physics, from military to From medical treatment to security inspection equipment, from production to life to scientific research and space exploration, this kind of ray is showing its unique charm more and more. [0003] Inorganic scintillators play a very important role in X-ray radiation detection and are widely used in imaging nuclear medicine, nuclear physics, high-energy physics, CT and security inspection and other fields. CsI:Tl is the inorganic scintillator most researched and used at present, because it not...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/202
Inventor 梁栌伊
Owner SHENZHEN BASDA MEDICAL APP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com