Detection device

Abstract

The present disclosure provides a detection device, which includes an electrode. The electrode includes a substrate, an electrode layer, an insulation layer, and an ion layer. The electrode layer is disposed on the substrate. The insulation layer is disposed on the electrode layer and includes a via. The ion layer is disposed on the insulation layer. The electrode layer and the ion layer are in contact through the via. The detection device provided by the present disclosure can have a relatively long service life.

Description

Technical Field

[0001] This disclosure relates to a detection device and a reference electrode used in an electrochemical sensor. Background Technology

[0002] Existing reference electrodes used in electrochemical sensors include silver / silver chloride (Ag / AgCl) electrodes, whose potential sensing depends on chloride ions (Cl... - The concentration change of chloride ions. Therefore, if the concentration of chloride ions on the surface of the reference electrode cannot be kept constant during potential sensing, it will affect the sensed results. Summary of the Invention

[0003] This disclosure pertains to a detection device that has relatively high stability and a relatively long service life.

[0004] Some embodiments disclosed herein provide a detection device including an electrode. The electrode includes a substrate, an electrode layer, an insulating layer, and an ion layer. The electrode layer is disposed on the substrate. The insulating layer is disposed on the electrode layer and includes a through-hole. The ion layer is disposed on the insulating layer. The electrode layer and the ion layer are in contact through the through-hole. Attached Figure Description

[0005] Figure 1 This is a partial cross-sectional schematic diagram of the detection device according to the first embodiment of this disclosure;

[0006] Figure 2 This is a partial cross-sectional schematic diagram of the detection device according to the second embodiment of this disclosure;

[0007] Figure 3 This is a partial cross-sectional schematic diagram of the detection device according to the third embodiment of this disclosure;

[0008] Figure 4 This is a partial cross-sectional schematic diagram of the detection device according to the fourth embodiment of this disclosure;

[0009] Figure 5 This is a partial cross-sectional schematic diagram of the detection device according to the fifth embodiment of this disclosure;

[0010] Figure 6 This is a partial cross-sectional schematic diagram of the detection device according to the sixth embodiment of this disclosure. Detailed Implementation

[0011] Reference will now be made in detail to the exemplary embodiments disclosed herein, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0012] This disclosure can be understood by referring to the following detailed description in conjunction with the accompanying drawings. It should be noted that, for ease of understanding and for the sake of brevity, many of the drawings in this disclosure depict only a portion of the electronic device, and certain components in the drawings are not drawn to scale. Furthermore, the number and dimensions of the components in the drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0013] Throughout this disclosure and in the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same element. This document is not intended to distinguish between elements that have the same function but different names. In the following description and claims, words such as "comprising," "containing," and "having" are open-ended terms and should therefore be interpreted as "containing but not limited to...". Thus, when the terms "comprising," "containing," and / or "having" are used in the description of this disclosure, they specify the presence of the corresponding feature, area, step, operation, and / or component, but do not exclude the presence of one or more of the corresponding feature, area, step, operation, and / or component.

[0014] The directional terms used herein, such as "up," "down," "front," "back," "left," and "right," are for reference only when referring to the accompanying drawings. Therefore, the directional terms used are illustrative and not intended to limit this disclosure. In the accompanying drawings, each figure illustrates general features of the methods, structures, and / or materials used in specific embodiments. However, these figures should not be construed as defining or limiting the scope or nature covered by these embodiments. For example, for clarity, the relative dimensions, thicknesses, and locations of various films, regions, and / or structures may be reduced or enlarged.

[0015] When a component (e.g., a membrane or region) is referred to as "on another component," it can be directly on that component, or there may be other components between them. On the other hand, when a component is referred to as "directly on another component," there are no components between them unless otherwise specified in the specification. Furthermore, when a component is referred to as "on another component," the two components are vertically related in the planar view, and this component can be above or below the other component, depending on the orientation of the device.

[0016] The terms "equal to" or "same as", "substantially" or "approximately" are generally interpreted as being within 20% of a given value or range, or as being within 10%, 5%, 3%, 2%, 1% or 0.5% of a given value or range.

[0017] The ordinal numbers used in the specification and claims, such as "first," "second," etc., to modify elements, do not in themselves imply or represent any prior ordinal number of that element (or those elements), nor do they represent the order of one element with another, or the order of manufacturing processes. The use of these ordinal numbers is solely to clearly distinguish one named element from another element with the same name. The claims and specification may not use the same terminology; therefore, a first element in the specification may be a second element in the claims.

[0018] It should be understood that the features in the following embodiments can be replaced, recombined, or mixed to complete other embodiments without departing from the spirit of this disclosure. Features between embodiments can be arbitrarily mixed and combined as long as they do not violate the spirit of the invention or conflict with it.

[0019] The electrical connection or connection described in this disclosure can refer to a direct connection or an indirect connection. In the case of a direct connection, the endpoints of the two circuit components are directly connected or connected to each other by a conductor segment. In the case of an indirect connection, there is a switch, diode, capacitor, inductor, other suitable component, or combination of the above components between the endpoints of the two circuit components, but not limited to these.

[0020] In this disclosure, the thickness, length, width, and area can be measured using an optical microscope, and the thickness can be measured from a cross-sectional image using an electron microscope, but these methods are not limited to these. Furthermore, any two values ​​or directions used for comparison may have a certain degree of error. If the first value equals the second value, it implies an error of approximately 10% between the two values; if the first direction is perpendicular to the second direction, the angle between the first and second directions may be between 80 and 100 degrees; if the first direction is parallel to the second direction, the angle between the first and second directions may be between 0 and 10 degrees.

[0021] Figure 1 This is a partial cross-sectional schematic diagram of the detection device according to the first embodiment of this disclosure.

[0022] Please refer to Figure 1 In this embodiment, the detection device 1a includes an electrode 10. The detection device 1a may be, for example, an electrochemical sensor with three electrodes, which may include a reference electrode, a working electrode, and a counter electrode, but this disclosure is not limited thereto.

[0023] Electrode 10 includes a substrate 100, an electrode layer 200, an insulating layer 300, and an ion layer 400. In this embodiment, electrode 10 serves as a reference electrode for detection device 1a.

[0024] The substrate 100 may be used to carry the remaining components in the electrode 10 and includes a suitable insulating material. For example, the material of the substrate 100 may include glass or polyethylene terephthalate (PET).

[0025] An electrode layer 200 is disposed on the substrate 100 and includes a suitable conductive material. In this embodiment, the material of the electrode layer 200 includes silver / silver chloride, but this disclosure is not limited thereto. In other embodiments, the electrode layer 200 may include metal oxides, carbon, and / or other suitable conductive materials.

[0026] An insulating layer 300 is disposed on the substrate 100 and may include a suitable insulating material. For example, the insulating layer 300 may include inorganic insulators or organic polymer insulators, such as silicon dioxide (SiO2), silicon nitride (Si3N4), aluminum oxide (Al2O3), polyimide (PI), epoxy resin, parylene, and acrylic resin, but is not limited thereto. In this embodiment, the insulating layer 300 is disposed on the electrode layer 200 and includes a through-hole V1 exposing at least a portion of the electrode layer 200. In some embodiments, the area of ​​the electrode layer 200 exposed by the through-hole V1 in the vertical direction Z is greater than or equal to 0.050 mm². 2 And less than or equal to 1.5 cm 2 In other embodiments, the width of the through-hole V1 in a direction perpendicular to the vertical direction Z (e.g., direction X) is greater than or equal to 1 cm and less than or equal to 1.5 cm. Additionally, in some embodiments, the impedance of the insulating layer 300 is greater than 10 ohms. 5 ohm.

[0027] An ion layer 400 is disposed on the insulating layer 300. In this embodiment, the electrode layer 200 and the ion layer 400 are in contact through a through-hole V1. The ion layer 400 can be used to maintain the electrical balance of the electrode layer 200. In this embodiment, the material of the ion layer 400 includes chloride-containing salts. For example, the material of the ion layer 400 may include potassium chloride (KCl), sodium chloride (NaCl), calcium chloride (CaCl2), magnesium chloride (MgCl2), ammonium chloride (NH4Cl), or other suitable salts. In some embodiments, the ion layer 400 may also include a chloride ion confinement layer, which may include a cation exchange material. For example, the material of the ion layer 400 may also include a perfluorinated sulfonic acid polymer (PFSA), which may be sulfonated polyetheretherketone (SPEEK), sulfonated poly(ethersulfone) (SPES), sulfonated poly(ether sulfone ketone) (SPESK), or sulfonated polyimide (SPI). Alternatively, the material of the ion layer 400 may also include polybenzimidazole (PBI). Alternatively, the ion layer 400 may also be a compound comprising a phosphate group (e.g., -PO2H2, -OPO2H2, or -PO3H2), a carboxylic acid group (e.g., -COOH), a sulfate group (e.g., -OSO3H or -OArSO3H), or a hydroxyl group (e.g., -OH).

[0028] In this embodiment, electrode 10 may further include a water-conducting layer 500 and a waterproof layer 600.

[0029] A water-conducting layer 500 is disposed on the ion layer 400. In this embodiment, the water-conducting layer 500 at least partially covers the ion layer 400. The water-conducting layer 500 can serve as a medium between the ion layer 400 and the external solution, and can allow ion exchange between the ion layer 400 and the external solution to maintain a stable potential.

[0030] A waterproof layer 600 is disposed on the water-conducting layer 500. The waterproof layer 600 serves to substantially separate the ion-conducting layer 400 from the external solution and may include a suitable insulating material. In this embodiment, the waterproof layer 600 at least partially covers the water-conducting layer 500 and includes a through-hole V2 exposing at least a portion of the water-conducting layer 500. The through-hole V2 of the waterproof layer 600 allows the external solution to flow into the interior of the waterproof layer 600. Although not shown in this embodiment, in other embodiments, the through-hole V2 may be filled with the same or similar material as the water-conducting layer 500 and / or the material of the chloride ion confinement layer. Additionally, in some embodiments, the water-conducting layer 500 may also include a through-hole (not shown) communicating with the through-hole V2 of the waterproof layer 600.

[0031] In this embodiment, due to the insulating layer 300, a portion of the electrode layer 200 contacts the ion layer 400 through the through-hole V1 of the insulating layer 300. Therefore, the through-hole V1 of the insulating layer 300 and the through-hole V2 of the waterproof layer 600 can have a specific distance in the X direction. Based on this design, the concentration of chloride ions near the through-hole V2 of the waterproof layer 600 can decrease only after a relatively long period of use, which helps to increase the time for the potential of the electrode layer 200 to remain stable, thereby improving the service life of the detection device 1a in this embodiment.

[0032] Figure 2 This is a partial cross-sectional schematic diagram of the detection device according to the second embodiment of this disclosure. It should be noted that... Figure 2 The embodiments can be used Figure 1 The component references and partial contents of the embodiments are as follows, wherein the same or similar references are used to represent the same or similar components, and the description of the same technical content is omitted.

[0033] Please refer to Figure 2 In this embodiment, the main difference between the detection device 1b and the detection device 1b in the above embodiment is that the detection device 1b does not include the water-conducting layer 500.

[0034] Specifically, in this embodiment, the waterproof layer 600 is disposed on the ion layer 400. In this embodiment, the waterproof layer 600 at least partially covers the ion layer 400, and its through-holes V2 expose at least a portion of the ion layer 400.

[0035] Figure 3 This is a partial cross-sectional schematic diagram of the detection device according to the third embodiment of this disclosure. It should be noted that... Figure 3 The embodiments can be used Figure 1 The component references and partial contents of the embodiments are as follows, wherein the same or similar references are used to represent the same or similar components, and the description of the same technical content is omitted.

[0036] Please refer to Figure 3In this embodiment, the main difference between the detection device 1c and the detection device 1a in the above embodiment is that the through hole V2 of the waterproof layer 600 includes a first through hole V21 and a second through hole V22.

[0037] Specifically, in this embodiment, the first through-hole V21 of the waterproof layer 600 is a vertical through-hole. That is, the first through-hole V21 of the waterproof layer 600 extends in the vertical direction Z. The second through-hole V22 of the waterproof layer 600 is a meandering through-hole. That is, the second through-hole V22 of the waterproof layer 600 includes a turning path in the vertical direction Z. In some embodiments, multiple first through-holes V21 and / or second through-holes V22 may be provided in the waterproof layer 600. In this embodiment, the second through-hole V22 can be used to adjust the reaction time of the electrode layer 200.

[0038] Figure 4 This is a partial cross-sectional schematic diagram of the detection device according to the fourth embodiment of this disclosure. It should be noted that... Figure 4 The embodiments can be used Figure 3 The component references and partial contents of the embodiments are as follows, wherein the same or similar references are used to represent the same or similar components, and the description of the same technical content is omitted.

[0039] Please refer to Figure 4 In this embodiment, the main difference between the detection device 1d and the detection device 1c in the above embodiment is that the detection device 1d also includes a wire 700.

[0040] In this embodiment, a wire 700 is disposed between the substrate 100 and the insulating layer 300, and is electrically connected to the electrode layer 200. The wire 700 can be used to electrically connect the electrode layer 200 to an external electrochemical sensor (not shown) to transmit the potential signal of the electrode layer 200 to the external electrochemical sensor. In this embodiment, at least a portion of the wire 700 is in contact with the electrode layer 200.

[0041] Figure 5 This is a partial cross-sectional schematic diagram of the detection device according to the fifth embodiment of this disclosure. It should be noted that... Figure 5 The embodiments can be used Figure 1 The component references and partial contents of the embodiments are as follows, wherein the same or similar references are used to represent the same or similar components, and the description of the same technical content is omitted.

[0042] Please refer to Figure 5 In this embodiment, the main difference between the detection device 1e and the detection device 1a in the above embodiment is that the waterproof layer 600 in the detection device 1e does not include through holes, and at least one side of the waterproof layer 600 exposes a portion of the water-conducting layer 500.

[0043] In detail, in this embodiment, the detection device 1e may further include an ion layer 800. The ion layer 800 is disposed on the insulating layer 300 and covers the surface 500s of the water-conducting layer 500 exposed by the waterproof layer 600. In some embodiments, the ion layer 800 may cover a portion of the waterproof layer 600. The material of the ion layer 800 may be the same as or similar to the material of the ion layer 400, which will not be described in detail here.

[0044] Furthermore, in this embodiment, the water-conducting layer 500 does not overlap with the through-hole V1 of the insulating layer 300 in the vertical direction Z. Specifically, in a direction perpendicular to the vertical direction Z (e.g., direction X), the distance d1 between the boundary of the water-conducting layer 500 near the through-hole V1 and the through-hole V1 of the insulating layer 300 is less than or equal to 5 mm.

[0045] Figure 6 This is a partial cross-sectional schematic diagram of the detection device according to the sixth embodiment of this disclosure. It should be noted that... Figure 6 The embodiments can be used Figure 5 The component references and partial contents of the embodiments are as follows, wherein the same or similar references are used to represent the same or similar components, and the description of the same technical content is omitted.

[0046] Please refer to Figure 6 In this embodiment, the main difference between the detection device 1f and the detection device 1e in the above embodiment is that the water-conducting layer 500 in the detection device 1f overlaps with the through hole V1 of the insulating layer 300 in the vertical direction Z.

[0047] In this embodiment, in a direction perpendicular to the vertical direction Z (e.g., direction X), the distance d2 between the boundary of the water-conducting layer 500 near the through hole V1 and the through hole V1 of the insulating layer 300 is less than or equal to 5 mm.

[0048] In summary, in the detection apparatus provided in some embodiments of this disclosure, an insulating layer with through holes is provided between the electrode layer and the ion layer, which can limit the area of ​​contact between the electrode layer and the ion layer. Based on this, the concentration of ions (e.g., chloride ions) in the ion layer not covered by the insulating layer can decrease only after a relatively long period of use, which helps to increase the time for the potential of the electrode layer to remain stable, thereby improving the service life of the detection apparatus provided in this disclosure.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection device, characterized in that, include: Electrodes, including: substrate; An electrode layer is disposed on the substrate; An insulating layer is disposed on the electrode layer and includes a first through-hole; and An ion layer is disposed on the insulating layer. The electrode layer and the ion layer are in contact through the first through-hole.

2. The detection device according to claim 1, further comprising: A water-conducting layer is disposed on the ion layer.

3. The detection device according to claim 2, further comprising: A waterproof layer is provided on the water-conducting layer.

4. The detection device according to claim 3, wherein the waterproof layer includes a second through hole, and the second through hole exposes the water-conducting layer.

5. The detection device according to claim 1, further comprising: A wire is disposed between the substrate and the insulating layer.

6. The detection device according to claim 3, further comprising: Another ion layer is disposed on the insulating layer, wherein the other ion layer covers the surface of the water-conducting layer exposed by the waterproof layer.

7. The detection device according to claim 2, wherein the water-conducting layer does not overlap with the first through-hole of the insulating layer in the vertical direction.

8. The detection device according to claim 7, wherein the distance between the boundary of the water-conducting layer near the first through hole and the first through hole is less than or equal to 5 mm.

9. The detection device according to claim 2, wherein the water-conducting layer overlaps with the first through-hole of the insulating layer in the vertical direction.

10. The detection device according to claim 9, wherein the distance between the boundary of the water-conducting layer near the first through hole and the first through hole is less than or equal to 5 mm.

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