Interconnection structure, splicing line and quantum measurement and control circuit
By adopting an interconnection structure including a third strip line and an elastic conductor in a quantum computer, the problem of unstable connection of flexible strip line is solved, and the reliability and stability of electrical connections are realized, which is suitable for quantum measurement and control lines.
Patent Information
- Application Number
- CN202422414785.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In quantum computers, as the number of quantum bits increases, the connection stability and reliability of flexible ribbon lines are difficult to ensure, especially in the limited space inside the diluted refrigerator, existing coaxial cables are difficult to miniaturize, and the multi-segment connection reliability of flexible ribbon lines is insufficient.
Using an interconnection structure including a third strip line, a first and a second elastic conductor, through the corresponding contact between the elastic conductor and the conductive trace and the flexible strip line, a detachable connection is achieved in combination with the fixture to ensure the reliability and stability of the electrical connection.
It realizes elastic electrical contact between flexible strip lines, reduces physical wear, ensures the reliability and stability of electrical connections, and is suitable for quantum measurement and control lines.
Smart Images
Figure CN223194057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of quantum computers, in particular to an interconnection structure, a splicing line and a quantum measurement and control circuit. Background Art
[0002] Quantum computing is a new computing model that uses the laws of quantum mechanics to control basic information units for calculations. While the basic information unit of classical computing is the classical bit, the basic information unit of quantum computing is the qubit. A classical bit can only exist in one state, either 0 or 1, but based on the quantum mechanical principle of superposition, a qubit can exist in a superposition of multiple possible states. As a result, quantum computing far outperforms classical computing in terms of computational efficiency.
[0003] In superconducting quantum computers, quantum chips must operate at extremely low temperatures, such as around 10mK. This low temperature is typically provided by a dilution refrigerator, where the quantum chip is mounted in the lowest temperature zone, typically at the bottom of the refrigerator. To control and measure the quantum chip at the bottom of the refrigerator, a circuit carrying quantum measurement and control signals must enter the refrigerator, pass through the refrigerator's various cold plates, and connect to the quantum chip in the lowest temperature zone.
[0004] With the rapid growth in the number of qubits, the required measurement and control signal transmission lines (also known as quantum measurement and control lines) have also increased, but the space inside the dilution refrigerator is usually limited. Currently, the signal transmission lines in the measurement and control signal transmission lines are usually coaxial cables. However, coaxial cables have the following disadvantages: their size will be difficult to achieve a smaller design on a large scale in the long term. With the development of flexible stripline, due to its small size and high integration, the use of flexible stripline to replace coaxial cable is increasing. When using flexible stripline, when a measurement and control line uses multiple flexible stripline segments, it is very important to ensure reliable electrical connections between these multiple flexible stripline segments.
[0005] It should be noted that the information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of implication that the information constitutes prior art already known to those skilled in the art. Utility Model Content
[0006] The purpose of the present utility model is to provide an interconnection structure, a splicing line and a quantum measurement and control system, wherein the interconnection structure is used to electrically connect a first flexible strip line integrating multiple first conductors and a second flexible strip line integrating multiple second conductors to achieve splicing of the two flexible strip lines.
[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0008] A first aspect of the present invention provides an interconnect structure for electrically connecting a first flexible strip line integrated with a plurality of first conductive lines and a second flexible strip line integrated with a plurality of second conductive lines, the interconnect structure comprising:
[0009] a third stripline comprising a dielectric layer and a plurality of conductive traces disposed within the dielectric layer;
[0010] a plurality of first elastic conductors, one end of each of the first elastic conductors being fixed to one end of each of the conductive traces in a one-to-one correspondence, and the other end of each of the first elastic conductors being configured to contact with each of the first conductive wires in a one-to-one correspondence;
[0011] a plurality of second elastic conductors, one end of each second elastic conductor being fixed to the other end of each conductive trace in a one-to-one correspondence, and the other end of each second elastic conductor being used to contact with each second conductive wire in a one-to-one correspondence;
[0012] a first fixing member, configured to detachably connect one end of the third strip line to the first flexible strip line;
[0013] The second fixing member is used to detachably connect the other end of the third strip line to the second flexible strip line.
[0014] In the interconnection structure as described above, further, the first elastic conductor and the second elastic conductor both include spring pins.
[0015] In the interconnection structure as described above, further, the conductive trace is in a zigzag shape or a long strip shape.
[0016] As described above, in the interconnection structure, further, the third stripline further includes a metal shielding layer covering at least one surface of the dielectric layer.
[0017] The interconnection structure as described above, further, the first fixing member and the second fixing member are both screws;
[0018] Alternatively, the first fixing member and the second fixing member are both clamps.
[0019] A second aspect of the present invention provides a splicing wire, comprising a first flexible strip line integrating a plurality of first conductive lines, a second flexible strip line integrating a plurality of second conductive lines, and the above-mentioned interconnection structure.
[0020] As for the spliced wire as described above, further, the material of the first conductor is a copper-containing metal, and the material of the second conductor is niobium-titanium.
[0021] The splicing wire as described above, further, a first notch is provided at one end of the first flexible strip line, and the first conductive wire is exposed at the first notch;
[0022] A second notch is provided at one end of the second flexible strip line opposite to the first flexible strip line, and the second conductive wire is exposed at the second notch.
[0023] The splicing wire as described above, further, the first flexible stripline is provided with a first metal via vertically electrically connected to the first conductor, and the second flexible stripline is provided with a second metal via vertically electrically connected to the second conductor;
[0024] The first elastic conductor is electrically connected to the first conductive line through a first metal via; and the second elastic conductor is electrically connected to the second conductive line through a second metal via.
[0025] A third aspect of the present invention provides a quantum measurement and control circuit, comprising the above-mentioned splicing wire, wherein one end of the splicing wire is electrically connected to a signal source or a measuring device, and the other end is electrically connected to a quantum chip.
[0026] The beneficial effects of the present invention are:
[0027] The interconnect structure of the present application includes a third stripline having a plurality of conductive traces. A plurality of first elastic conductors and a first fixing member are provided to achieve one-to-one electrical connection between the plurality of conductive traces and a plurality of first conductors in a first flexible strip. A second elastic conductor and a second fixing member are provided to achieve one-to-one electrical connection between the plurality of conductive traces and a plurality of second conductors in a second flexible strip. Thus, electrical connection between the first flexible stripline and the second flexible stripline is achieved through the interconnect structure. Due to the provision of the first elastic conductor and the second elastic conductor, the interconnect structure is in elastic electrical contact with both the first flexible stripline and the second flexible stripline, which not only ensures the reliability of the electrical contact but also reduces physical wear, thereby ensuring the reliability and stability of the electrical connection between the first flexible stripline and the second flexible stripline.
[0028] The splicing line and quantum measurement and control circuit provided by the present invention include the above-mentioned interconnection structure, and therefore have the same beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 Schematic diagram of the interconnection structure provided by the embodiment of the utility model Figure 1 ;
[0030] Figure 2 Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 1 ;
[0031] Figure 3 Schematic diagram of the interconnection structure provided by the embodiment of the utility model Figure 2 ;
[0032] Figure 4 Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 2 ;
[0033] Figure 5 Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 3 ;
[0034] Figure 6 for Figure 5 A magnified view of middle A;
[0035] In the accompanying drawings: 10, third stripline; 11, conductive trace; 12, dielectric layer; 13, metal shielding layer; 20, first elastic conductor; 30, second elastic conductor; 40, first fixing member; 50, second fixing member; 60, first metal via; 80, first flexible stripline; 81, first conductor; 90, second flexible stripline; 91, second conductor. DETAILED DESCRIPTION
[0036] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. The embodiments described below with reference to the drawings are exemplary and are only used to explain this application, and cannot be interpreted as limiting this application.
[0037] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0039] Figure 1 Schematic diagram of the interconnection structure provided by the embodiment of the utility model Figure 1 ; Figure 2Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 1 ;like Figure 1 and Figure 2 As shown in the figure: The embodiment of the present application discloses an interconnect structure for electrically connecting a first flexible stripline 80 integrating multiple first conductive lines 81 and a second flexible stripline 90 integrating multiple second conductive lines 91. The interconnect structure includes: a third stripline 10, the third stripline 10 including a dielectric layer 12 and multiple conductive traces 11 disposed in the dielectric layer 12; a plurality of first elastic conductors 20, one end of each first elastic conductor 20 being fixed to one end of each conductive trace 11 in a one-to-one correspondence, and the other end of each first elastic conductor 20 being configured to contact each first conductive line 81 in a one-to-one correspondence; a plurality of second elastic conductors 30, one end of each second elastic conductor 30 being fixed to the other end of each conductive trace 11 in a one-to-one correspondence, and the other end of each second elastic conductor 30 being configured to contact each second conductive line 91 in a one-to-one correspondence; a first fixing member 40 for detachably connecting one end of the third stripline 10 to the first flexible stripline 80; and a second fixing member 50 for detachably connecting the other end of the third stripline 10 to the second flexible stripline 90.
[0040] The interconnect structure in this embodiment includes a third stripline 10 having a plurality of conductive traces 11. A plurality of first elastic conductors 20 and a first fixture 40 are provided to achieve one-to-one electrical connection between the plurality of conductive traces 11 and a plurality of first conductive wires 81 in the first flexible strip. Second elastic conductors 30 and a second fixture 50 are provided to achieve one-to-one electrical connection between the plurality of conductive traces 11 and a plurality of second conductive wires 91 in the second flexible strip. Thus, electrical connection between the first flexible stripline 80 and the second flexible stripline 90 is achieved through the interconnect structure. Due to the provision of the first elastic conductors 20 and the second elastic conductors 30, the interconnect structure is in elastic electrical contact with both the first flexible stripline 80 and the second flexible stripline 90, which not only ensures the reliability of the electrical contact but also reduces physical wear, thereby ensuring the reliability and stability of the electrical connection between the first flexible stripline 80 and the second flexible stripline 90.
[0041] In this embodiment, the type of the first elastic conductor 20 is not specifically limited. In some implementations of this embodiment, the first elastic conductor 20 includes spring pins. By using spring pins, the stability and reliability of the electrical connection between the interconnection structure and the first flexible stripline 80 are ensured.
[0042] In this embodiment, the type of the second elastic conductor 30 is not specifically limited. In some implementations of this embodiment, the second elastic conductor 30 includes spring pins. By using spring pins, the stability and reliability of the electrical connection between the interconnection structure and the second flexible stripline 90 are ensured.
[0043] In this embodiment, the shape of the conductive trace 11 is not particularly limited, so as to facilitate electrical connection. Figure 3 Schematic diagram of the interconnection structure provided by the embodiment of the utility model Figure 2 ;like Figure 1 and Figure 3 As shown: In order to facilitate electrical connection, in some implementations of this embodiment, the conductive trace 11 is Z-shaped or long strip-shaped.
[0044] Continue as Figure 1 and Figure 3 As shown in some implementations of this embodiment, the interconnect structure of the third stripline 10 further includes a metal shielding layer 13 covering at least one surface of the dielectric layer 12. The provision of the metal shielding layer 13 reduces external signal interference, ensures the signal quality transmitted by the conductive traces 11 in the interconnect structure, and improves the stability and reliability of the electrical connection. Furthermore, the metal shielding layer 13 is provided on all surfaces of the dielectric layer 12 in the third stripline 10 that are not contacted by the first flexible stripline 80 and the second flexible stripline 90.
[0045] In this embodiment, the first fixing member 40 and the second fixing member 50 are not specifically limited. In some implementation methods of this embodiment, the first fixing member 40 and the second fixing member 50 are both screws; detachable connection can be achieved conveniently and quickly through screws; in other implementation methods of this embodiment, the first fixing member 40 and the second fixing member 50 are both clamps.
[0046] Figure 4 Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 2 ;like Figure 2 and Figure 4 As shown: Based on the same application concept, the embodiment of the present application also proposes a splicing line, including a first flexible strip line 80 integrating multiple first conductors 81, a second flexible strip line 90 integrating multiple second conductors 91, and the above-mentioned interconnection structure.
[0047] The splicing line of the present application includes the above-mentioned interconnection structure, and therefore has the same beneficial effects as the above-mentioned interconnection structure, which will not be described in detail here.
[0048] It should be noted that the splicing line of this embodiment may also include a third flexible strip line, or even more. The third flexible strip line can be electrically connected to the first flexible strip line 80, or to the second flexible strip line 90. The specific electrical connection is achieved by splicing with other flexible strip lines through an interconnection structure.
[0049] In this embodiment, the first conductor 81 and the second conductor 91 can be signal lines made of the same material, illustratively, both containing copper. Of course, the first conductor 81 and the second conductor 91 can also be signal lines made of different materials. For example, when the spliced wire of this embodiment is used in a quantum measurement and control circuit, it needs to pass through a 4K cold plate in a refrigerator, and signal lines of different materials can be used. The spliced wire of this embodiment can be composed of a first flexible stripline 80, in which the first conductor 81 is a conductive metal material with low thermal conductivity (such as phosphor bronze, beryllium copper, or silver), and a second flexible stripline 90, in which the second conductor 91 is a superconducting material (such as niobium titanium). The first flexible stripline 80 is located in a temperature range above 4K, and the second flexible stripline 90 is located in a temperature range below or equal to 4K.
[0050] In this embodiment, the electrical connection between the first flexible stripline 80 and the second flexible stripline 90 and the interconnect structure is not specifically limited. To facilitate electrical connection, in some implementations of this embodiment, a first notch is provided at one end of the first flexible stripline 80, exposing the first conductive wire 81. A second notch is provided at the end of the second flexible stripline 90 opposite the first flexible stripline 80, exposing the second conductive wire 91. The first elastic conductor 20 contacts the exposed first conductive wire 81, and the second elastic conductor 30 contacts the exposed second conductive wire 91, thereby electrically connecting the first flexible stripline 80 and the second flexible stripline 90 to the interconnect structure. Two specific examples of interconnect structures and splicing lines are provided below for this structure of the first flexible stripline 80 and the second flexible stripline 90.
[0051] Example 1: Figure 1 and Figure 2 As shown, the interconnect structure is Z-shaped, and the conductive trace 11 therein is also Z-shaped. Specifically, a third notch is provided above one end of the third stripline 10, and a fourth notch is provided below the other end of the third stripline 10, forming a Z-shaped interconnect structure. The conductive trace 11 includes a third wire and a fourth wire arranged horizontally and a fifth wire perpendicular to the third wire and the fourth wire. The two ends of the fifth wire are respectively electrically connected to one end of the third wire and one end of the fourth wire, forming a Z-shaped conductive trace 11.
[0052] One end of the first elastic conductor 20 is fixed to the third wire, and the other end of the first elastic conductor 20 passes through the third notch and contacts the first wire 81 exposed at the first notch. One end of the second elastic conductor 30 is fixed to the fourth wire, and the other end of the second elastic conductor 30 passes through the fourth notch and contacts the second wire 91 exposed at the second notch, forming a circuit as shown in FIG. Figure 2 The long strip of splicing line shown.
[0053] It should be noted that, in this example, the Z-shaped conductive trace 11 can be realized by a multi-layer PCB board.
[0054] Example 2: For example Figure 3 and Figure 4 As shown, the interconnect structure is in the shape of an elongated strip, wherein the conductive trace 11 is also in the shape of an elongated strip. Specifically, the third stripline 10 is in the shape of an elongated strip. One end of the first elastic conductor 20 fixed to the conductive trace 11 has its other end extending from the dielectric layer 12 of the third stripline 10 and contacting the first wire 81 exposed at the first notch. The other end of the second elastic conductor 30 fixed to the conductive trace 11 has its other end extending from the dielectric layer 12 of the third stripline 10 and contacting the second wire 91 exposed at the second notch, forming a structure as shown in FIG. Figure 4 The long strip of splicing line shown.
[0055] Figure 5 Schematic diagram of the structure of the splicing line provided by the embodiment of the utility model Figure 3 ; Figure 6 for Figure 5 A magnified view of the middle; Figure 5 and Figure 6 As shown: To facilitate electrical connection, in some other implementations of this embodiment, the first flexible stripline 80 is provided with a first metal via 60 electrically connected to the first conductive line 81 at a vertical angle, and the second flexible stripline 90 is provided with a second metal via electrically connected to the second conductive line 91 at a vertical angle; the first elastic conductor 20 is electrically connected to the first conductive line 81 through the first metal via 60; and the second elastic conductor 30 is electrically connected to the second conductive line 91 through the second metal via.
[0056] Based on the same application concept, an embodiment of the present application further proposes a quantum measurement and control circuit, comprising the above-mentioned splicing wire, one end of the splicing wire is electrically connected to a signal source or a measuring device, and the other end is electrically connected to a quantum chip.
[0057] The quantum measurement and control circuit of the present application includes the above-mentioned splicing line, and therefore has the same beneficial effects as the above-mentioned splicing line, which will not be repeated here.
[0058] Throughout this specification, references to terms such as "some embodiments" or "examples" indicate that the specific features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments. Furthermore, those skilled in the art may combine and reconcile the different embodiments or examples described in this specification.
[0059] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any way. Any person skilled in the art who, without departing from the scope of the present invention, makes any equivalent substitution, modification, or other variation to the technical solution and technical content disclosed herein shall be deemed to fall within the scope of the present invention and remain within the scope of protection of the present invention.
Claims
1. An interconnect structure for electrically connecting a first flexible strip line integrated with a plurality of first conductors and a second flexible strip line integrated with a plurality of second conductors, characterized in that: The interconnect structure comprises: a third stripline comprising a dielectric layer and a plurality of conductive traces disposed within the dielectric layer; a plurality of first elastic conductors, one end of each of the first elastic conductors being fixed to one end of each of the conductive traces in a one-to-one correspondence, and the other end of each of the first elastic conductors being configured to contact with each of the first conductive wires in a one-to-one correspondence; a plurality of second elastic conductors, one end of each second elastic conductor being fixed to the other end of each conductive trace in a one-to-one correspondence, and the other end of each second elastic conductor being used to contact with each second conductive wire in a one-to-one correspondence; a first fixing member, configured to detachably connect one end of the third strip line to the first flexible strip line; The second fixing member is used to detachably connect the other end of the third strip line to the second flexible strip line.
2. The interconnection structure according to claim 1, wherein: The first elastic conductor and the second elastic conductor each include a pogo pin.
3. The interconnection structure according to claim 1, wherein: The conductive trace is in a zigzag shape or a long strip shape.
4. The interconnection structure according to claim 1, wherein: The third stripline further includes a metal shielding layer covering at least one surface of the dielectric layer.
5. The interconnection structure according to any one of claims 1 to 4, characterized in that: The first fixing member and the second fixing member are both screws; Alternatively, the first fixing member and the second fixing member are both clamps.
6. A splicing line, characterized in that: The invention comprises a first flexible strip line integrating a plurality of first conducting wires, a second flexible strip line integrating a plurality of second conducting wires, and the interconnection structure according to any one of claims 1 to 5.
7. The splicing line according to claim 6, wherein: The first conductive wire is made of copper-containing metal, and the second conductive wire is made of niobium-titanium.
8. The splicing line according to claim 6, wherein: A first notch is provided at one end of the first flexible strip line, and the first conductive wire is exposed at the first notch; A second notch is provided at one end of the second flexible strip line opposite to the first flexible strip line, and the second conductive wire is exposed at the second notch.
9. The splicing line according to claim 6, wherein: The first flexible stripline is provided with a first metal via that is vertically electrically connected to the first conductive line, and the second flexible stripline is provided with a second metal via that is vertically electrically connected to the second conductive line; The first elastic conductor is electrically connected to the first conductive line through the first metal via; and the second elastic conductor is electrically connected to the second conductive line through the second metal via.
10. A quantum measurement and control circuit, characterized in that: The method comprises the splicing wire according to any one of claims 6 to 9, wherein one end of the splicing wire is electrically connected to a signal source or a measuring device, and the other end of the splicing wire is electrically connected to a quantum chip.