Flexible electrode for electrocardio measurement and preparation method thereof

Abstract

The invention provides a flexible electrode for electrocardio measurement and a preparation method thereof. The invention provides a flexible electrode for electrocardio measurement. The flexible electrode comprises an Ecoflex layer, a conductive layer, a viscous layer and an electrode body, the Ecoflex layer, the conductive layer and the viscous layer are sequentially stacked, and a second through hole formed in the viscous layer is communicated with a non-penetrating injection hole formed in the conductive layer; the electrode body is arranged in the second through hole in a penetrating manner; one end of the electrode body is arranged in the injection hole and is in contact with the conductive layer; the end face of the other end of the electrode body is exposed out of the face, away from the conductive layer, of the adhesive layer. The flexible electrode for electrocardio measurement is good in performance in the aspects of long-time monitoring and skin conformity.

Description

Technical Field

[0001] The present invention relates to the field of sensing technology, and in particular to a flexible electrode for electrocardiogram measurement and a preparation method thereof. Background Art

[0002] An electrocardiogram (ECG) patch is a sensor used to monitor changes in cardiac electrical signals. The electrodes on the patch can detect, analyze, and compare changes in biopotentials to monitor heart health and, in turn, prevent a range of heart diseases. Ag / AgCl electrodes with wet conductive gel are widely used to collect biopotential signals. However, wet electrodes have poor performance in terms of long-term monitoring and skin conformity. Summary of the Invention

[0003] The purpose of the present invention is to provide a flexible electrode for electrocardiogram measurement and a preparation method thereof, so as to solve the technical problems in the prior art that wet electrodes have poor performance in long-term monitoring and skin conformity.

[0004] The technical solution of the present invention is as follows: providing a flexible electrode for electrocardiogram measurement, comprising an Ecoflex layer, a conductive layer, an adhesive layer, and an electrode body;

[0005] The Ecoflex layer, the conductive layer and the adhesive layer are stacked in sequence, and the second through hole formed in the adhesive layer is connected to the non-penetrating injection hole formed in the conductive layer; the electrode body is passed through the second through hole; one end of the electrode body is arranged in the injection hole and contacts the conductive layer; the end face of the other end of the electrode body is exposed on the side of the adhesive layer away from the conductive layer.

[0006] Another technical solution of the present invention is as follows, which also provides a method for preparing a flexible electrode for electrocardiogram measurement, comprising:

[0007] An Ecoflex layer, a conductive layer, an adhesive layer, and a PVA mask layer are sequentially formed on the PET layer;

[0008] forming a first through hole and a second through hole on the PVA mask layer and the adhesive layer, respectively, and forming a non-penetrating injection hole on the conductive layer, wherein the first through hole, the second through hole, and the injection hole are connected;

[0009] forming a mask pattern on the PVA mask layer, and removing a portion of the mask on the PVA mask layer according to the mask pattern, so that the first through hole becomes a third through hole;

[0010] injecting C-PDMS material into the third through hole, the second through hole and the injection hole;

[0011] The PVA mask layer is removed, and the C-PDMS material is completely cured to form an electrode body.

[0012] Furthermore, the step of sequentially forming an Ecoflex layer, a conductive layer, an adhesive layer, and a PVA mask layer on the PET layer includes:

[0013] Ecoflex material is coated on the PET layer to form an Ecoflex layer, C-PDMS material is coated on the side of the Ecoflex layer away from the PET layer to form a conductive layer, silicone gel is coated on the side of the conductive layer away from the Ecoflex layer to form an adhesive layer, and a PVA mask is attached to the side of the adhesive layer away from the conductive layer to form a PVA mask layer.

[0014] Furthermore, forming a first through hole and a second through hole on the PVA mask layer and the adhesive layer respectively, and forming a non-penetrating injection hole on the conductive layer, comprises:

[0015] A first through hole and a second through hole are formed on the PVA mask layer and the adhesive layer respectively by using a laser, and a non-penetrating injection hole is formed on the conductive layer by using a laser.

[0016] Furthermore, forming a mask pattern on the PVA mask layer includes: forming a mask pattern on the PVA mask layer using a laser.

[0017] Furthermore, after injecting the C-PDMS material into the third through hole, the second through hole and the injection hole, and before removing the PVA mask layer, the method further includes: semi-curing the C-PDMS material.

[0018] Further, injecting C-PDMS material into the third through hole, the second through hole and the injection hole includes: injecting C-PDMS material into the third through hole, the second through hole and the injection hole, so that the C-PDMS material covers the PVA mask layer.

[0019] Furthermore, the removing of the PVA mask layer includes: removing the PVA mask layer and the C-PDMS material covering the PVA mask layer.

[0020] Furthermore, the C-PDMS material is completely cured, including: using an oven to completely cure the C-PDMS material.

[0021] Furthermore, after the C-PDMS material is completely cured to form the electrode body, the method further includes: removing the PET layer.

[0022] The beneficial effects of the present invention are: by stacking the Ecoflex layer, the conductive layer and the adhesive layer in sequence, the second through hole formed in the adhesive layer is connected to the non-penetrating injection hole formed in the conductive layer; the electrode body is passed through the second through hole; one end of the electrode body is arranged in the injection hole and contacts the conductive layer; the end face of the other end of the electrode body is exposed to the side of the adhesive layer away from the conductive layer, and the flexible electrode used for electrocardiogram measurement has better performance in long-term monitoring and skin conformity, can reduce the relative displacement and friction between the skin and the electrode, thereby maintaining conformal contact between the two, is suitable for long-term monitoring, and helps to improve the quality of electrocardiogram monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention;

[0024] Figure 2 A top view of a flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention;

[0025] Figure 3 A schematic flow chart of a method for preparing a flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention;

[0026] Figure 4 A cross-sectional view of an Ecoflex layer formed by coating an Ecoflex material on a PET layer according to an embodiment of the present invention;

[0027] Figure 5 A top view of an Ecoflex layer formed by coating an Ecoflex material on a PET layer according to an embodiment of the present invention;

[0028] Figure 6 A cross-sectional view of an embodiment of the present invention showing a conductive layer formed by coating a C-PDMS material on a side of the Ecoflex layer away from the PET layer;

[0029] Figure 7 A top view of an embodiment of the present invention showing a conductive layer formed by coating a C-PDMS material on a side of the Ecoflex layer away from the PET layer;

[0030] Figure 8 A cross-sectional view of an embodiment of the present invention showing a conductive layer having an adhesive layer formed by coating silicone gel on a side away from the Ecoflex layer;

[0031] Figure 9 A top view of an embodiment of the present invention showing a conductive layer having an adhesive layer formed by coating silicone gel on a side away from the Ecoflex layer;

[0032] Figure 10 A cross-sectional view of a PVA mask layer formed by attaching a PVA mask to a side of the adhesive layer away from the conductive layer according to an embodiment of the present invention;

[0033] Figure 11 A top view of a PVA mask layer formed by attaching a PVA mask to a side of the adhesive layer away from the conductive layer according to an embodiment of the present invention;

[0034] Figure 12 A cross-sectional view after step S302 is completed according to an embodiment of the present invention;

[0035] Figure 13 A top view after step S302 is completed according to an embodiment of the present invention;

[0036] Figure 14 A cross-sectional view of a PVA mask layer after a mask pattern is formed according to an embodiment of the present invention;

[0037] Figure 15 A top view of a PVA mask layer after a mask pattern is formed thereon, provided in an embodiment of the present invention;

[0038] Figure 16 A cross-sectional view after step S303 is completed according to an embodiment of the present invention;

[0039] Figure 17 A top view after step S303 is completed according to an embodiment of the present invention;

[0040] Figure 18 A cross-sectional view after step S304 is completed according to an embodiment of the present invention;

[0041] Figure 19 A top view after step S304 is completed according to an embodiment of the present invention;

[0042] Figure 20 A cross-sectional view after step S305 is completed according to an embodiment of the present invention;

[0043] Figure 21 This is a top view after step S305 is completed according to an embodiment of the present invention.

[0044] Figure 22 This is a diagram showing the test results of electrocardiogram measurement using the flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention.

[0045] Figure numerals: 1-PET layer; 2-Ecoflex layer; 3-conductive layer; 4-adhesive layer; 5-PVA mask layer; 6-electrode body; 7-first through hole; 8-second through hole; 9-injection hole; 10-mask pattern; 11-third through hole; 12-C-PDMS material. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be practiced in an order other than that illustrated or described herein.

[0048] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] Example 1

[0050] The embodiment of the present invention provides a flexible electrode for electrocardiogram measurement, the structural diagram of which is as follows: Figure 1 As shown, the flexible electrode for electrocardiogram measurement includes an Ecoflex layer 2, a conductive layer 3, an adhesive layer 4 and an electrode body 6;

[0051] The Ecoflex layer 2, the conductive layer 3 and the adhesive layer 4 are stacked in sequence, and the second through hole 8 formed in the adhesive layer 4 is connected to the non-penetrating injection hole 9 formed in the conductive layer 3; the electrode body 6 is passed through the second through hole 8; one end of the electrode body 6 is arranged in the injection hole 9 and contacts the conductive layer 3; the end face of the other end of the electrode body 6 is exposed on the side of the adhesive layer 4 away from the conductive layer 3.

[0052] In a specific embodiment, Figure 1 is a cross-sectional view of a flexible electrode for electrocardiogram measurement, and its corresponding top view of a flexible electrode for electrocardiogram measurement, as shown in FIG. Figure 2 shown. Figure 2 In the embodiment, the end surface of the other end of the electrode body 6 is a polygon. The end surface of the other end of the electrode body 6 can also be other shapes, which are not limited here.

[0053] In an embodiment of the present invention, the Ecoflex layer 2, the conductive layer 3 and the adhesive layer 4 are stacked in sequence, so that the second through hole 8 formed in the adhesive layer 4 is connected to the non-penetrating injection hole 9 formed in the conductive layer 3; the electrode body 6 is passed through the second through hole 8; one end of the electrode body 6 is arranged in the injection hole 9 and contacts the conductive layer 3; the end face of the other end of the electrode body 6 is exposed to the side of the adhesive layer 4 away from the conductive layer 3, and the flexible electrode used for electrocardiogram measurement has good performance in long-term monitoring and skin conformity, can reduce the relative displacement and friction between the skin and the electrode, thereby maintaining conformal contact between the two, is suitable for long-term monitoring, and helps to improve the quality of electrocardiogram monitoring.

[0054] Example 2

[0055] The embodiment of the present invention provides a method for preparing a flexible electrode for electrocardiogram measurement, and its flow chart is as follows: Figure 3 As shown, the method for preparing a flexible electrode for electrocardiogram measurement includes:

[0056] S301, forming an Ecoflex layer 2, a conductive layer 3, an adhesive layer 4 and a PVA mask layer 5 in sequence on the PET layer 1;

[0057] In some embodiments, the step of sequentially forming an Ecoflex layer 2, a conductive layer 3, an adhesive layer 4, and a PVA mask layer 5 on the PET layer 1 includes:

[0058] Ecoflex material is coated on the PET layer 1 to form an Ecoflex layer 2, C-PDMS material 12 is coated on the side of the Ecoflex layer 2 away from the PET layer 1 to form a conductive layer 3, silicone gel is coated on the side of the conductive layer 3 away from the Ecoflex layer 2 to form an adhesive layer 4, and a PVA mask is attached to the side of the adhesive layer 4 away from the conductive layer 3 to form a PVA mask layer 5.

[0059] In a specific embodiment, a transparent Ecoflex material can be applied on the surface of a PET (polyethylene terephthalate) layer using an applicator to form an Ecoflex layer 2. A cross-sectional view of the Ecoflex layer 2 formed by applying the Ecoflex material on the PET layer 1 is shown as follows: Figure 4 As shown, the top view after Ecoflex material is coated on the PET layer 1 to form the Ecoflex layer 2 is shown in FIG. Figure 5As shown; a C-PDMS material 12 is applied to one side of the Ecoflex layer 2 away from the PET layer 1, and after the C-PDMS material 12 is completely cured, a conductive layer 3 is formed. A cross-sectional view of the conductive layer 3 is formed after the C-PDMS material 12 is applied to one side of the Ecoflex layer 2 away from the PET layer 1, as shown Figure 6 As shown, the top view after the C-PDMS material 12 is coated on the side of the Ecoflex layer 2 away from the PET layer 1 to form the conductive layer 3, as shown in FIG. Figure 7 A transparent silicone gel is coated on the conductive layer 3 to form a viscous layer 4, and a cross-sectional view of the conductive layer 3 away from the Ecoflex layer 2 is formed after the silicone gel is coated on the side of the conductive layer 3 to form a viscous layer 4, as shown Figure 8 As shown, the top view after the silicone gel is coated on the side of the conductive layer 3 away from the Ecoflex layer 2 to form the adhesive layer 4, as shown in FIG. Figure 9 As shown; a blue PVA (polyvinyl alcohol) mask is attached to the adhesive layer 4 to form a PVA mask layer 5, so as to facilitate subsequent cutting processing, and a cross-sectional view of the adhesive layer 4 away from the conductive layer 3 is attached to form a PVA mask layer 5 after the PVA mask is attached, as shown Figure 10 , a top view of a PVA mask layer 5 formed by attaching a PVA mask to the side of the adhesive layer 4 away from the conductive layer 3, as shown in FIG. Figure 11 Among them, Ecoflex is a rubber with low viscosity, ultra-flexibility and excellent tensile properties, C-PDMS is conductive carbon powder PDMS (polydimethylsiloxane), which has conductivity, and the transparent silicone gel can be transparent 527.

[0060] S302, forming a first through hole 7 and a second through hole 8 on the PVA mask layer 5 and the adhesive layer 4, respectively, and forming a non-penetrating injection hole 9 on the conductive layer 3, wherein the first through hole 7, the second through hole 8, and the injection hole 9 are connected;

[0061] In some embodiments, forming a first through hole 7 and a second through hole 8 on the PVA mask layer 5 and the adhesive layer 4, respectively, and forming a non-penetrating injection hole 9 on the conductive layer 3, comprises:

[0062] A first through hole 7 and a second through hole 8 are formed on the PVA mask layer 5 and the adhesive layer 4 respectively by using a laser, and a non-penetrating injection hole 9 is formed on the conductive layer 3 by using a laser.

[0063] In a specific embodiment, the cross-sectional view after step S302 is completed is as follows: Figure 12 As shown, the top view after step S302 is completed is as follows: Figure 13As shown. The PVA mask layer 5 and the adhesive layer 4 are punched through by laser, forming a first through hole 7 and a second through hole 8 in the PVA mask layer 5 and the adhesive layer 4. The conductive layer 3 is partially punched through by laser, forming a non-penetrating injection hole 9 in the conductive layer 3. The first through hole 7, the second through hole 8, and the injection hole 9 are connected.

[0064] S303 , forming a mask pattern 10 on the PVA mask layer 5 , and removing a portion of the mask on the PVA mask layer 5 according to the mask pattern 10 , so that the first through hole 7 becomes a third through hole 11 ;

[0065] In some embodiments, forming the mask pattern 10 on the PVA mask layer 5 includes: forming the mask pattern 10 on the PVA mask layer 5 using a laser.

[0066] In a specific embodiment, a cross-sectional view after forming a mask pattern 10 on the PVA mask layer 5 is shown as follows: Figure 14 As shown, a top view after forming a mask pattern 10 on the PVA mask layer 5 is shown. Figure 15 The power of the laser is controlled to precisely cut the PVA mask layer 5 to form a mask pattern 10. A portion of the mask on the PVA mask layer 5 is removed according to the mask pattern 10, so that the first through hole 7 becomes a third through hole 11. The cross-sectional view after step S303 is completed is shown in FIG. Figure 16 As shown, the top view after step S303 is completed is as follows: Figure 17 shown.

[0067] S304, injecting C-PDMS material 12 into the third through hole 11, the second through hole 8 and the injection hole 9;

[0068] In a specific embodiment, the cross-sectional view after step S304 is completed is as follows: Figure 18 As shown, the top view after step S304 is completed is as follows: Figure 19 As shown; C-PDMS material 12 is injected into the third through hole 11, the second through hole 8 and the injection hole 9 to form a conductive pattern, and the C-PDMS material 12 is connected to the conductive layer 3.

[0069] In some embodiments, injecting C-PDMS material 12 into the third through hole 11, the second through hole 8 and the injection hole 9 includes: injecting C-PDMS material 12 into the third through hole 11, the second through hole 8 and the injection hole 9, so that the C-PDMS material 12 covers the PVA mask layer 5.

[0070] In a specific embodiment, Figure 18 、 Figure 19As shown, while injecting the C-PDMS material 12 into the third through hole 11, the second through hole 8 and the injection hole 9, the C-PDMS material 12 can cover the PVA mask layer 5, so as to facilitate the control of filling the third through hole 11, the second through hole 8 and the injection hole 9 with the C-PDMS material 12.

[0071] S305 , removing the PVA mask layer 5 , and completely curing the C-PDMS material 12 to form an electrode body 6 .

[0072] In some embodiments, completely curing the C-PDMS material 12 includes completely curing the C-PDMS material 12 in an oven.

[0073] In a specific embodiment, the cross-sectional view after step S305 is completed is as follows: Figure 20 As shown, the top view after step S305 is completed is as follows: Figure 21 As shown; the PVA mask layer 5 is removed to expose the adhesive layer 4, and the PET layer 1, the Ecoflex layer 2, the conductive layer 3, the adhesive layer 4 and the C-PDMS material 12 injected into the third through hole 11, the second through hole 8 and the injection hole 9 can be placed in an oven as a whole, and the C-PDMS material 12 is completely cured to form the electrode body 6.

[0074] In some embodiments, after injecting the C-PDMS material 12 into the third through hole 11 , the second through hole 8 , and the injection hole 9 , and before removing the PVA mask layer 5 , the method further includes semi-curing the C-PDMS material 12 .

[0075] In some embodiments, removing the PVA mask layer 5 includes: removing the PVA mask layer 5 and the C-PDMS material 12 covering the PVA mask layer 5 .

[0076] In a specific embodiment, because the C-PDMS material 12 covers the PVA mask layer 5, when removing the PVA mask layer 5, it is necessary to remove the C-PDMS material 12 covering the PVA mask layer 5 at the same time, so that the shape of the electrode body 6 exposed from the adhesive layer 4 corresponds to the mask pattern 10.

[0077] In some embodiments, after the C-PDMS material 12 is completely cured to form the electrode body 6 , the method further includes: removing the PET layer 1 .

[0078] In a specific embodiment, the flexible electrode for ECG measurement formed after removing the PET layer 1 can be used directly. Figure 1 、 Figure 2 shown.

[0079] The method for preparing a flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention comprises forming an Ecoflex layer 2, a conductive layer 3, an adhesive layer 4, and a PVA mask layer 5 on a PET layer 1 in sequence; forming a first through hole 7 and a second through hole 8 on the PVA mask layer 5 and the adhesive layer 4, respectively, and forming a non-penetrating injection hole 9 on the conductive layer 3, wherein the first through hole 7, the second through hole 8, and the injection hole 9 are connected; forming a mask pattern 10 on the PVA mask layer 5, and removing part of the mask on the PVA mask layer 5 according to the mask pattern 10, so that the first through hole 7 becomes a third through hole 8. Through hole 11; injecting C-PDMS material 12 into the third through hole 11, the second through hole 8 and the injection hole 9; removing the PVA mask layer 5, and completely curing the C-PDMS material 12 to form an electrode body 6, so as to obtain a flexible electrode for electrocardiogram measurement. Since the C-PDMS material 12 is a flexible material, the flexible electrode for electrocardiogram measurement has better performance in long-term monitoring and skin conformability, can reduce the relative displacement and friction between the skin and the electrode, thereby maintaining conformal contact between the two, is suitable for long-term monitoring, and helps to improve the quality of electrocardiogram monitoring.

[0080] The flexible electrode for electrocardiogram measurement provided by the embodiment of the present invention has good measurement effect when performing actual electrocardiogram measurement applications. Figure 22 The test results of ECG measurements using the flexible electrodes provided by an embodiment of the present invention are shown. As can be seen from the figure, the flexible electrodes of the present invention can clearly capture ECG signals, with complete ECG waveforms, distinct features such as the P wave, QRS complex, and T wave, a high signal-to-noise ratio, and a stable waveform. This demonstrates that the flexible electrodes provided by the present invention not only possess excellent structural flexibility and conformability, but also achieve high-quality ECG signal acquisition in practical applications, making them suitable for long-term ECG monitoring and effectively improving the accuracy and stability of ECG detection.

[0081] The method for preparing a flexible electrode for electrocardiogram measurement provided by an embodiment of the present invention adopts a laser engraving mask to prepare the electrode structure, which is convenient for subsequent large-scale industrial production.

[0082] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A flexible electrode for electrocardiogram measurement, characterized in that: It includes an Ecoflex layer, a conductive layer, an adhesive layer and an electrode body; The Ecoflex layer, the conductive layer and the adhesive layer are stacked in sequence, and the second through hole formed in the adhesive layer is connected to the non-penetrating injection hole formed in the conductive layer; the electrode body is passed through the second through hole; one end of the electrode body is arranged in the injection hole and contacts the conductive layer; the end face of the other end of the electrode body is exposed on the side of the adhesive layer away from the conductive layer.

2. A method for preparing a flexible electrode for electrocardiogram measurement, characterized in that: include: An Ecoflex layer, a conductive layer, an adhesive layer, and a PVA mask layer are sequentially formed on the PET layer; forming a first through hole and a second through hole on the PVA mask layer and the adhesive layer, respectively, and forming a non-penetrating injection hole on the conductive layer, wherein the first through hole, the second through hole, and the injection hole are connected; forming a mask pattern on the PVA mask layer, and removing a portion of the mask on the PVA mask layer according to the mask pattern, so that the first through hole becomes a third through hole; injecting C-PDMS material into the third through hole, the second through hole and the injection hole; The PVA mask layer is removed, and the C-PDMS material is completely cured to form an electrode body.

3. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: The step of sequentially forming an Ecoflex layer, a conductive layer, an adhesive layer, and a PVA mask layer on the PET layer comprises: Ecoflex material is coated on the PET layer to form an Ecoflex layer, C-PDMS material is coated on the side of the Ecoflex layer away from the PET layer to form a conductive layer, silicone gel is coated on the side of the conductive layer away from the Ecoflex layer to form an adhesive layer, and a PVA mask is attached to the side of the adhesive layer away from the conductive layer to form a PVA mask layer.

4. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: Forming a first through hole and a second through hole on the PVA mask layer and the adhesive layer respectively, and forming a non-penetrating injection hole on the conductive layer, comprising: A first through hole and a second through hole are formed on the PVA mask layer and the adhesive layer respectively by using a laser, and a non-penetrating injection hole is formed on the conductive layer by using a laser.

5. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: Forming a mask pattern on the PVA mask layer includes: forming the mask pattern on the PVA mask layer using a laser.

6. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: After injecting the C-PDMS material into the third through hole, the second through hole, and the injection hole, and before removing the PVA mask layer, the method further includes: semi-curing the C-PDMS material.

7. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: Injecting C-PDMS material into the third through hole, the second through hole, and the injection hole includes: injecting C-PDMS material into the third through hole, the second through hole, and the injection hole, so that the C-PDMS material covers the PVA mask layer.

8. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 7, wherein: The removing of the PVA mask layer includes: removing the PVA mask layer and the C-PDMS material covering the PVA mask layer.

9. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: The C-PDMS material is completely cured, comprising: using an oven to completely cure the C-PDMS material.

10. The method for preparing a flexible electrode for electrocardiogram measurement according to claim 2, wherein: After the C-PDMS material is completely cured to form the electrode body, the method further includes: removing the PET layer.

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