CT detector module

Abstract

The utility model provides a CT (Computed Tomography) detector module. The CT detector module comprises a photodiode, a scintillator, a flexible circuit board and a structural member, the photodiode is provided with a front surface and a back surface which are oppositely arranged, and the back surface is provided with an electrode structure of the photodiode. The scintillator is arranged on the front face of the photodiode. The flexible circuit board is connected with the electrode structure and extends from the back surface. The structural members comprise a first structural member and a second structural member, the first structural member is arranged between the photodiode and the flexible circuit board, and the second structural member is arranged below the flexible circuit board and connected with the first structural member. And seamless connection of the CT detector module in four directions is ensured, so that a wider scanning area is covered, and the scanning accuracy and completeness are improved.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor technology, specifically to a CT detector module. Background Technology

[0002] The CT detector module is the core component of a CT (Computed Tomography) scanner. Its main function is to convert received X-ray signals into electrical signals, and then into digital signals that can be used for image reconstruction. The working principle of the CT detector module is based on the attenuation and photoelectric conversion of X-rays. When X-rays pass through human tissue, they undergo varying degrees of attenuation. The detector module receives these attenuated X-rays and converts them into optical signals using a scintillator. Subsequently, photodiodes convert the optical signals into electrical signals, which are further processed by circuitry and an analog-to-digital converter chip. Finally, these electrical signals are converted into digital signals for image reconstruction.

[0003] In existing technologies, CT detector modules can generally only be stitched together along two or three boundaries. While this stitching method expands the area of ​​the CT detector module to some extent, the degree of expansion is limited, affecting the accuracy and completeness of the scan. Utility Model Content

[0004] In view of the problems existing in the prior art described above, this application provides a CT detector module that ensures seamless connection of the CT detector module in four directions, thereby covering a wider scanning area and improving the accuracy and completeness of the scan.

[0005] To achieve the above and other related objectives, this utility model provides a CT detector module, which includes:

[0006] A photodiode has a front side and a back side arranged opposite to each other, and the electrode structure of the photodiode is arranged on the back side.

[0007] A scintillator is positioned on the front side of the photodiode;

[0008] At least one flexible circuit board is connected to the electrode structure and extends from the back side;

[0009] The structural component includes a first structural component and a second structural component. The first structural component is disposed between the photodiode and the flexible circuit board, and the second structural component is disposed below the flexible circuit board and connected to the first structural component.

[0010] Optionally, the electrode structures are disposed on opposite sides of the back of the photodiode.

[0011] Optionally, the electrode structures are spaced apart on both sides of the back side and arranged linearly, the number of flexible circuit boards is two, and the second structural component is disposed between the two flexible circuit boards.

[0012] Optionally, the flexible circuit board includes:

[0013] A flexible substrate connected to an electrode structure, the flexible substrate including an electrode region and a device region spaced apart;

[0014] Circuit board electrodes are disposed in the electrode area of ​​the flexible substrate and are connected to the electrode structure through lines on the flexible circuit board;

[0015] The analog-to-digital converter chip is located in the device area of ​​the flexible substrate. The analog-to-digital converter chip communicates with the electrodes of the circuit board through the lines on the flexible circuit board.

[0016] Optionally, the structural component may be made of aluminum.

[0017] Optionally, the photodiode and the flexible circuit board are connected using ACF thermoforming technology.

[0018] Optionally, openings are provided on both sides of the first structural member, and the flexible circuit board extends through the openings.

[0019] Optionally, the length of the opening is greater than or equal to the width of the flexible circuit board, and the width of the opening is greater than or equal to the thickness of the flexible circuit board.

[0020] Optionally, the photodiode is attached to the first structural component.

[0021] Optionally, the second structural member includes a connecting portion and an extension portion. The second structural member is detachably connected to the first structural member from the connecting portion. The width of the connecting portion is equal to the width of the first structural member, and the width of the extension portion is greater than or equal to the width of the flexible circuit board and less than the width of the connecting portion.

[0022] As described above, the CT detector module provided by this utility model has at least the following beneficial technical effects:

[0023] This utility model discloses a CT detector module comprising a photodiode, a scintillator, a flexible circuit board, and structural components. The photodiode has a front and a back side arranged opposite each other, with the electrode structure of the photodiode disposed on the back side. The scintillator is disposed on the front side of the photodiode. The flexible circuit board is connected to the electrode structure and extends from the back side. The structural components include a first structural component and a second structural component. The first structural component is disposed between the photodiode and the flexible circuit board, and the second structural component is disposed below the flexible circuit board and connected to the first structural component. This ensures seamless connection of the CT detector module in four directions, thereby covering a wider scanning area and improving the accuracy and completeness of the scan. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the CT detector module in an embodiment of this utility model.

[0025] Figure 2 This is a structural diagram of the photodiode and flexible circuit board in an embodiment of this utility model.

[0026] Figure 3 This is a top view of the photodiode in an embodiment of this utility model.

[0027] Figure 4 This is a structural diagram of a CT detector module that does not include structural components in an embodiment of this utility model.

[0028] Figure 5 This is a top view of the first structural component in an embodiment of this utility model.

[0029] Figure Labels

[0030] 1. Photodiode; 11. Front side; 12. Back side; 121. Electrode structure; 2. Flexible circuit board; 21. Flexible substrate; 22. Circuit board electrode; 23. Analog-to-digital converter chip; 24. Device area; 25. Electrode area; 3. Structural component; 31. First structural component; 311. Opening; 32. Second structural component; 321. Connecting part; 322. Extension part; 4. Scintillator. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0032] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Although the illustrations only show components related to this utility model and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this utility model, and the layout of the components may also be more complex.

[0033] This embodiment provides a CT detector module, referencing... Figures 1 to 3 The CT detector module of this utility model includes a photodiode 1, a scintillator 4, a flexible circuit board 2, and a structural component 3.

[0034] Specifically, refer to Figure 1 and Figure 2A photodiode 1 is a semiconductor device consisting of a PN junction that converts optical signals into electrical signals. It is widely used in photoelectric detection, fiber optic communication, optical instruments, and sensors, playing a crucial role in converting optical signals into electrical signals in CT detector modules. The photodiode 1 has a front side 11 and a back side 12 arranged opposite each other. An electrode structure 121 serves as a bridge connecting the photodiode 1 to external circuitry. In this embodiment, the electrode structure 121 is located on the back side 12 of the photodiode 1, spaced apart and linearly arranged on both sides of the back side 12. This arrangement not only saves space but also simplifies the connection process between the flexible circuit board 2 and the photodiode 1, thereby improving the integration and reliability of the entire CT detector module. In an optional embodiment of this invention, to further simplify the connection process between the flexible circuit board 2 and the electrode structure 121, the electrode structure 121 is located on opposite sides of the back side 12 of the photodiode 1. This layout not only maximizes the use of the space on the back side 12 of the photodiode 1 but also provides a more intuitive and convenient path for the flexible circuit board 2 to be connected.

[0035] Reference Figure 1 and Figure 4 A scintillator 4 is disposed on the front side 11 of the photodiode 1. As a highly efficient energy conversion material, the scintillator 4 rapidly absorbs X-rays and releases photons when X-rays penetrate and interact with it. These photons exist in the form of visible light. This process is essentially an energy conversion process, where the energy of the X-rays is absorbed by the scintillator 4 and re-radiated as light. This conversion mechanism makes the scintillator 4 a bridge connecting the X-ray source and the photodiode 1. When an X-ray signal irradiates the scintillator 4, the scintillator 4 rapidly converts these invisible X-rays into visible light signals. Subsequently, these light signals are guided to the adjacent photodiode 1. As a highly sensitive optoelectronic device, the photodiode 1 can efficiently capture these light signals and further convert them into electrical signals. Through the close cooperation between the scintillator 4 and the photodiode 1, the entire T-detector module can achieve efficient reception and conversion of X-ray signals. This design not only improves the sensitivity and accuracy of the CT detector module but also provides reliable data support for subsequent image reconstruction and diagnosis.

[0036] Reference Figure 2 and Figure 4The CT detector module of this application includes at least one flexible circuit board 2, which is connected to the electrode structure 121 and extends from the back side 12 of the photodiode 1. To ensure sufficient signal fan-out space for the CT detector module, in an optional embodiment of this first embodiment, the CT detector module includes two flexible circuit boards 2, which are respectively connected to the electrode structures 121 on both sides of the back side 12. Each flexible circuit board 2 extends from the back side 12 of the photodiode 1, providing the necessary flexibility and convenience for subsequent circuit connections and signal processing. This application effectively solves the problem of insufficient signal fan-out space by using two flexible circuit boards 2, thereby improving the performance of the CT detector module. Each flexible circuit board 2 includes a flexible substrate 21, circuit board electrodes 22, and an analog-to-digital converter chip 23. The flexible substrate 21 is made of polyimide, a high-performance polymer material with good flexibility, heat resistance, and insulation, making it very suitable for manufacturing circuit boards that need to be bent, folded, or twisted to adapt to complex spatial layouts. The flexible substrate 21 is connected to the electrode structure 121. The flexible substrate 21 includes an electrode region 25 and a device region 24 spaced apart. The device region 24 provides sufficient space for the subsequent installation of the analog-to-digital converter chip 23. The electrode region 25 is located at the connection end between the flexible substrate 21 and the electrode structure 121. The circuit board electrode 22 is disposed in the electrode region 25 and is connected to the electrode structure 121 through the lines on the flexible circuit board 2. The circuit board electrode 22 and the electrode structure 121 are connected through the internal lines of the flexible circuit board 2, thereby allowing electrical signals to be transmitted between the photodiode 1 and the flexible circuit board 2, ensuring the accuracy and timeliness of the signal processing of the entire CT detector module. The analog-to-digital converter chip 23 is a key component on the flexible circuit board 2. The analog-to-digital converter chip 23 is disposed in the device region 24 of the flexible substrate 21. The analog-to-digital converter chip 23 is communicatively connected to the circuit board electrode 22 through the lines on the flexible circuit board 2 to receive electrical signals from the circuit board electrode 22. The analog-to-digital converter chip 23 plays a crucial role in further processing the electrical signals received from the photodiode 1, converting them into digital signals to provide critical data support for subsequent image reconstruction and data analysis. The high performance and stability of the analog-to-digital converter chip 23 are essential for ensuring the accuracy and reliability of the entire CT detector module.

[0037] Anisotropic conductive film (ACF) is an advanced material used for microelectronic assembly and interconnection, commonly found in flexible electronics, displays (such as LCDs and OLEDs), camera modules, and other high-density integrated circuits for packaging and interconnection. Photodiode 1 and flexible circuit board 2 are connected using ACF thermoforming technology. ACF's stable conductivity ensures reliable electrical connections between microelectronic components, thereby improving the stability and reliability of the entire system. Furthermore, using ACF simplifies the manufacturing and assembly processes of microelectronic components, reduces production costs, and increases production efficiency.

[0038] Reference Figure 1 and Figure 5 The structural component 3 includes a first structural component 31 and a second structural component 32. The first structural component 31 is disposed between the photodiode 1 and the flexible circuit board 2, serving to support and fix the photodiode 1 and the flexible circuit board 2. The first structural component 31 is connected to the photodiode 1 by adhesive. This connection method is not only simple and quick, but also provides sufficient bonding strength to ensure the stability and reliability of the photodiode 1 in the CT detector module. Openings 311 are provided on both sides of the first structural component 31, through which the flexible circuit board 2 extends. Figure 1 and Figure 5 As shown, the length h of the opening 311 in the Y-axis direction is greater than or equal to the width W3 of the flexible circuit board 2 in the X-axis direction, and the width d of the opening 311 in the X-axis direction is greater than or equal to the thickness t of the flexible circuit board 2 in the Z-axis direction. This allows the flexible circuit board 2 to extend downwards through the opening 311, avoiding connection difficulties caused by space constraints. Figure 1As shown, the second structural member 32 includes a connecting portion 321 and an extension portion 322. The second structural member 32 is disposed between the two flexible circuit boards 2 and is detachably connected to the first structural member 31 from the connecting portion 321 by screws. The width W2 of the connecting portion 321 in the X-axis direction is equal to the width W1 of the first structural member 31 in the X-axis direction. The width W3 of the extension portion 322 in the X-axis direction is greater than or equal to the width W4 of the flexible circuit board 2 in the X-axis direction and less than the width W2 of the connecting portion 321 in the X-axis direction. The screw connection has the advantages of high strength and good reliability, which can ensure a tight connection and stable support between the first structural member 31 and the second structural member 32. The first structural member 31 and the second structural member 32 are used to fix the photodiode 1 and the flexible circuit board 2. The first structural member 31 and the second structural member 32 work together to ensure the fixation and stability of the photodiode 1 and the flexible circuit board 2 in the CT detector module through precise size design and reasonable connection method. Aluminum is a material with advantages such as low density, high strength, and good corrosion resistance, making it very suitable for manufacturing components that require lightweight construction while maintaining a certain load-bearing capacity. Therefore, in this embodiment, structural component 3 is made of aluminum. In the design of the CT detector module, using aluminum not only helps to significantly reduce the weight of the entire module, thereby reducing the burden on the equipment and improving portability and flexibility, but also effectively controls costs and enhances the product's market competitiveness.

[0039] Reference Figures 1 to 5 The CT detector module of this application achieves high integration, high reliability and low cost by optimizing the design and connection of photodiode 1, scintillator 4, flexible circuit board 2 and structural component 3. In addition, the photodiode 1 of the CT detector module of this application has four exposed sides except for the front side 11 and the back side 12. The four exposed sides can be used for splicing, which enables the CT detector module of this application to achieve four-sided splicing, thereby improving the accuracy and integrity of scanning.

[0040] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A CT detector module characterized by, The application relates to a photoelectric diode, which comprises: a photoelectric diode with oppositely arranged front and back surfaces, the back surface being provided with an electrode structure of the photoelectric diode; a scintillator arranged on the front surface of the photoelectric diode; at least one flexible circuit board connected with the electrode structure and extending from the back surface; a structure member comprising a first structure member arranged between the photoelectric diode and the flexible circuit board and a second structure member arranged below the flexible circuit board and connected with the first structure member.

2. The CT detector module of claim 1, wherein, The electrode structure is arranged on opposite sides of the back surface of the photoelectric diode.

3. The CT detector module of claim 2, wherein, The electrode structure is arranged in linear arrangement on the two sides of the back surface, and the number of the flexible circuit boards is two, and the second structure member is arranged between the two flexible circuit boards.

4. The CT detector module of claim 1, wherein, The flexible circuit board comprises: a flexible substrate connected with the electrode structure, the flexible substrate comprising electrode areas and device areas arranged at intervals; circuit board electrodes arranged on the electrode areas of the flexible substrate and connected with the electrode structure through lines on the flexible circuit board; an analog-to-digital converter chip arranged on the device areas of the flexible substrate, the analog-to-digital converter chip being connected with the circuit board electrodes through lines on the flexible circuit board.

5. The CT detector module of claim 1, wherein, The material of the structure member is aluminum.

6. The CT detector module of claim 3, wherein, The photoelectric diode and the flexible circuit board are connected by ACF hot pressing technology.

7. The CT detector module of claim 1, wherein, The first structure member is provided with openings on two sides, and the flexible circuit board extends through the openings.

8. The CT detector module of claim 7, wherein, The length of the opening is greater than or equal to the width of the flexible circuit board, and the width of the opening is greater than or equal to the thickness of the flexible circuit board.

9. The CT detector module of claim 1, wherein, The photoelectric diode is attached to the first structure member.

10. The CT detector module of claim 9, wherein, The second structure member comprises a connecting part and an extending part, the second structure member being detachably connected with the first structure member from the connecting part, the width of the connecting part being equal to the width of the first structure member, and the width of the extending part being greater than or equal to the width of the flexible circuit board and smaller than the width of the connecting part.

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