WO2018082362A1

WO2018082362A1 - Method for fabricating epidermal electrode

Info

Publication number: WO2018082362A1
Application number: PCT/CN2017/097654
Authority: WO
Inventors: 杨泽宇; 鲁南姝; 王普林
Original assignee: 成都柔电云科科技有限公司
Priority date: 2016-11-03
Filing date: 2017-08-16
Publication date: 2018-05-11
Also published as: CN107887079B; CN107887079A; WO2018082584A1

Abstract

Disclosed is a method for fabricating an epidermal electrode (1). The epidermal electrode (1) has a transducing touch piece (11). The method for fabricating the epidermal electrode (1) comprises the following steps: a) providing a metal film (2): the metal film (2) comprises an upper metal layer (21) and a lower metal layer (22), and a plastic layer (23) sandwiched between the upper metal layer (21) and the lower metal layer (22); b) perforating: forming a via hole (111) on the metal film (2) at the position where the transducing touch piece (11) is to be shaped; c) spreading glue: spreading an electrically conductive glue (112) in a plurality of such via holes (11) to make the upper metal layer (21) and the lower metal layer (22) form an electrical connection via the electrically conductive glue (112); and d) fully etching: punching the structure of the transducing touch piece (11) on the metal film (2). The method for fabricating the epidermal electrode (1) can make a thinner epidermal electrode (1), and the method for fabricating the epidermal electrode (1) is simple and the fabrication efficiency is high.

Description

Skin electrode manufacturing method

Technical field

The invention relates to a method for manufacturing a sensor, and more particularly to a method for manufacturing a skin electrode in the field of manufacturing a wearable device.

Background technique

The epidermal electrode is a flexible pullable secondary electrode that can be adhered to human skin like a temporary tattoo so as to be able to monitor the electrophysiological signal of the human body like a conventional device.

The existing skin electrode is usually made of a composite film formed by a metal layer and a plastic layer adhered together, wherein the metal layer is used for bonding with the skin of the human body, in order to conduct the data of the metal layer to the external chip, In the prior art, the electro-physiological data measured by the metal layer is obtained by perforating the composite film and mounting the conductive nails in the perforations, connecting the metal layer through the conductive nails, and connecting the conductive nails to the chip through the external wires.

However, the skin electrode of the structure has a thick thickness of the skin electrode due to the use of the conductive nail structure, which limits the development of the skin electrode to the light and thin direction; in addition, the friction generated by the conductive nail and the metal layer under the dynamic of the human body is generated. Dynamic noise causes measurement data to be inaccurate and wears the metal layer; further, conductive pins are not conducive to connection to small chips.

Therefore, it is necessary to provide a new method of fabricating a skin electrode to overcome the above drawbacks.

Summary of the invention

It is an object of the present invention to provide a method for producing a skin electrode, by which a thinner skin electrode can be produced, which is simple in production, high in production efficiency, and low in production cost.

The invention provides a method for fabricating a skin electrode, wherein the skin electrode has a sensing contact, and the method for manufacturing the skin electrode comprises the following steps:

a) providing a metal film: the metal film includes an upper metal layer and a lower metal layer, and a plastic layer is interposed between the upper metal layer and the lower metal layer;

b) perforation: performing a perforation operation at a position on the metal film where the sensing contact is to be formed;

c) potting: filling a plurality of the perforations with a conductive paste to electrically connect the upper metal layer and the lower metal layer through the conductive paste;

d) Full Engraving: The structure of the sensing contact is punched out on the metal film.

The method and the advantage of the method for producing the skin electrode of the present invention are that a thinner and thinner skin electrode can be produced by the method, and the method for producing the skin electrode is simple and the production efficiency is high.

DRAWINGS

1 is a schematic view showing the outer structure of a sensor contact sheet of a skin electrode of the present invention.

2 is a schematic cross-sectional view of a metal film used to manufacture the skin electrode of the present invention.

Figure 3 is a schematic cross-sectional view of a perforation in a metal film.

4 is a schematic cross-sectional view showing a conductive paste filled in a perforation of a metal film.

Figure 5 is a schematic cross-sectional view showing the adhesion of a metal film to a plastic base film.

Fig. 6 is a schematic cross-sectional view showing the structure of punching a sensor contact on a metal film.

Figure 7 is a schematic cross-sectional view showing the sensor contact pad attached to the plastic base film.

Fig. 8 is a schematic view showing the structure of the bottom surface of the skin electrode.

Fig. 9 is a schematic view showing the top surface structure of the skin electrode.

Fig. 10 is a schematic view showing the structure of a metal film after perforation.

Fig. 11 is a schematic view showing the structure of the lower metal layer of the metal film after half-cutting.

Fig. 12 is a schematic view showing the structure of the upper metal layer of the metal film after half-cutting.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1

As shown in FIG. 1 to FIG. 4, the present invention provides a method for fabricating a skin electrode, the skin electrode 1 having a sensing contact 11, and the method for fabricating the skin electrode includes the following steps:

a) providing a metal film 2: the metal film 2 includes an upper metal layer 21 and a lower metal layer 22, between the upper metal layer 21 and the lower metal layer 22 is sandwiched with a plastic layer 23;

b) perforation: performing a perforation 111 at a position on the metal film 2 where the sensing contact 11 is to be formed;

c) potting: filling a plurality of the through holes 111 with a conductive paste 112 to electrically connect the upper metal layer 21 and the lower metal layer 22 through the conductive paste 112;

d) Full engraving: The structure of the sensing contact 11 is punched out on the metal film 2.

The skin electrode 1 is a tool for contacting the human skin and sensing the potential difference of the human body. By connecting the skin electrode 1 to the chip, data detected on the skin electrode 1 can be obtained. As shown in FIG. 1 , the sensing contact 11 of the skin electrode 1 is a basic unit for measuring the potential of the human body, and the shape of the sensing contact 11 can be arbitrarily selected according to actual needs. In the present invention, the sensing contact 11 is A plurality of connected hollow fan structures 113 are formed. The hollow fan structure 113 is composed of four sides of a generally "S" shape, and each of the hollow fan structures 113 has a hollow hole 114. The sensing contact 11 of the structure is adopted. It can have more superior pull-in performance and can be more closely attached to human skin, making the measurement data of the skin electrode 1 more reliable. The potential difference of the human body can be acquired in real time by arranging the plurality of sensing contacts 11 on the human skin and conducting the measurement data of the plurality of sensing contacts 11 to the external chip through the external wires.

The specific steps of the present invention for fabricating the skin electrode 1 of the sensor strip 11 having the hollowed out fan structure 113 described above are as follows:

In the step a), as shown in FIG. 2, a metal film 2 is first provided, and the metal film 2 is substantially in the shape of a rectangular parallelepiped, which is formed by sequentially bonding the upper metal layer 21, the plastic layer 23 and the lower metal layer 22 to each other. Thin film structure. In this embodiment, the upper metal layer 21 may be made of platinum, gold or stainless steel, and has a thickness h1 of 50 nm to 200 nm; and the lower metal layer 22 may be made of a conductive metal material or alloy material such as gold, aluminum, stainless steel or copper. The thickness h2 is 50 nm to 200 nm; the plastic layer 23 may be a polyethylene terephthalate (PET) or a polyimide (PI) material having a thickness h3 of 0.5 μm to 25 μm.

In step b), as shown in FIG. 3, according to the shape and structure of the sensor contact piece 11 to be formed, a punching operation is performed at a position on the metal film 2 where the sensor contact piece 11 is to be formed, and the hole diameter d of the hole 111 is 0.1. Mm ~ 0.3mm. In this embodiment, the through hole 111 penetrates the upper surface of the metal film 2 and the lower surface of the metal film 2. The through hole 111 can be formed, for example, by laser etching. Of course, other prior art tools can be used for the metal film. 2 Perform the punching operation without limitation. In addition, the number of the perforations 111 on the sensing contact 11 and the distance between the two adjacent perforations 111 can also be selected according to actual needs, which is not limited herein. In the present invention, please refer to FIG. 1 , the position of the plurality of perforations 111 can be set, for example, on the common “S” edge of two adjacent hollow fan structures 113, each “S” edge. There are three perforations 111 arranged at equal intervals.

Further, before the step b) is completed and the step c) is performed, the plurality of perforations 111 on the metal film 2 are subjected to an ultrasonic cleaning operation. For example, the metal film 2 etched with the plurality of through holes 111 is placed in the ultrasonic cleaning device, and the ultrasonic cleaning device is activated to perform ultrasonic cleaning on the plurality of through holes 111 on the metal film 2 to remove the broken holes in the through holes 111. The swarf facilitates the subsequent adhesion of the conductive paste in the through hole 111 to the through hole 111.

After the ultrasonic cleaning operation is completed, step c) is performed, as shown in FIG. 4, the plurality of perforations 111 of the metal film 2 are filled. gum. In the present invention, the conductive paste 112 is dropped into the through hole 111 by means of titration. The conductive paste 112 may be a conductive paste made of epoxy resin mixed silver powder. When the conductive paste 112 is dropped into the through hole 111, the conductive paste 112 gradually The solidification in the perforation 111 is limited by the material of the conductive paste 112, so that the two ends of the conductive paste 112 dropped into the through hole 111 slightly overflow the upper metal layer 21 and the lower metal layer 22 of the metal film 2, so that the conductive paste can be made. The contact area of the upper metal layer 21 and the lower metal layer 22 is relatively increased, which facilitates the circuit connection between the upper metal layer 21 and the lower metal layer 22.

In the present invention, since the sensing contact piece 11 is formed with a plurality of hollow holes 114, the step d) can be completed in two steps as follows:

D1) The inner side is fully engraved: a plurality of hollow holes 114 of the sensing contact piece 11 are punched out on the metal film 2;

D2) All external engraving: After completing step d1), the outer edge 115 of the sensing contact 11 is punched out on the metal film 2.

Specifically, before the step d), the metal film 2 is adhered to a plastic base film 3; that is, before the step d1), the lower metal layer of the metal film 2 is as shown in FIG. 22 is adhered to the plastic base film 3, which may be a single-sided PET or PI material having a thickness h4 of 0.05 mm to 0.1 mm.

Thereafter, as shown in FIG. 6, the inside of the step d1) is fully engraved: each of the hollow holes 114 of the sensing contact 11 is punched on the metal film 2 and the plastic base film 3. For example, the metal film 2 with the plastic base film 3 is placed on a horizontal film plate with the metal film 2 facing upward and the plastic base film 3 facing downward; then, a first cutter is provided, and the first cutter is placed on the metal film 2 Above, the first cutter is moved downward to punch the metal film 2 and the plastic base film 3. In this embodiment, the first cutter has the same shape as the contour of the plurality of hollow holes 114 of the sensing contact 11, and the die-cut metal film 2 and the plastic are adjusted by adjusting the distance that the first cutter moves downward. The depth of the base film 3. In the step d1), the metal film 2 and the plastic base film 3 are die-cut by the first cutter so that a plurality of hollow holes 114 are formed on the metal film 2 and the plastic base film 3.

After the above step d1) is completed, step d2) is performed on the outer side: the outer edge 115 of the sensing contact 11 is punched on the metal film 2. For example, after the first tool is replaced with the second tool, the metal film 2 is punched down by the second tool. The second cutter has a cutter having the same contour shape as the outer edge 115 of the sensor contact 11, and the depth of the die-cut metal film 2 is adjusted by adjusting the distance by which the second cutter moves downward. In this step d2), the second cutter performs the punching operation only on the metal film 2 without performing the punching operation on the plastic base film 3.

After the above step d2) is completed, as shown in FIG. 7, the sensing contact piece 11 and the scrap metal film 12 separated from each other are formed on the plastic base film 3, and the scrap metal film 12 is peeled off from the plastic base film 3. That is, the sensing contact 11 adhered to the plastic base film 3 is obtained.

Finally, the sensor contact piece 11 adhered to the plastic base film 3 can be reversely bonded to a plastic film having a viscosity greater than that of the plastic base film 3, thereby achieving peeling of the sensor contact piece 11 and the plastic base film 3, and finally producing Complete a complete epidermal electrode 1 structure.

In another embodiment of the present invention, the structure of the skin electrode 1 is not limited to the above-mentioned sensor contact piece 11 having a plurality of hollow fan structures 113, and the sensor contact piece 11 of the skin electrode 1 can be arbitrarily selected according to actual needs. Shape, no restrictions here.

When the skin electrode 1 selects another shape structure, in step d), the metal film 2 can be punched by a punching tool to form the structure of the sensor contact piece 11, wherein the punching tool is die-cut. The shape of the knife is the same as the contour shape of the sensor contact piece 11. By punching in this manner, the efficiency of manufacturing the sensor contact 11 can be relatively increased.

Embodiment 2

As shown in FIG. 8 and FIG. 9 , according to an embodiment of the present invention, the skin electrode 1 includes a collecting contact 13 and a plurality of spaced apart sensing contacts 11 , between each sensing contact 11 and the collecting contact 13 . They are connected by a sensing strip 14. In this embodiment, only the skin electrode 1 needs to be in contact with the skin of the human body, and the external chip is attached to the collecting contact piece 13, so that real-time collection of the potential difference of the human body can be realized. Here, the skin sensor 1 has three sensing contacts 11 as an example. The three sensing contacts 11 are equally spaced, the collecting contacts 13 are located at the middle and lower portions of the skin electrode 1, and the three sensing contacts 11 are respectively The three contact strips 14 are connected to the collecting contact 13 .

In the method of fabricating the skin electrode of the second embodiment, the specific steps of fabricating the above-described skin electrode 1 on the provided metal film 2 are as follows:

The second embodiment differs from the first embodiment only in that between step b) and step c), step b1) is further included: the metal layer 22 is half-cut: the lower metal layer 22 is punched to form a half on the lower metal layer 22. The line 221 is located on the sensing strip 14.

Further, before the step b1) is completed and the step c) is performed, the step b2) is further performed on the metal layer 21: the metal layer 21 is die-cut, and the upper metal layer 21 forms a half-notch 211 corresponding to the position where the contact 13 is collected. A plurality of sensing strips 14 are separated from each other by the half-notch 211.

Specifically, in the step b) of the second embodiment, the position of the plurality of perforations 111 formed after the perforation operation on the metal film 2 is as shown in FIG. 10 from the plan view of the metal film 2.

After the step b) is completed, the step b1) is performed for half-cutting of the metal layer 22: please refer to FIG. 8 to perform a half-cut operation at a position corresponding to the sensing strip 14 and the sensing contact 11, that is, The lower metal layer 22 of the metal film 2 after the perforation is etched by laser cutting, and as shown in FIG. 11, three half-cut lines 221 are formed on the lower metal layer 22.

Then, step b2) is performed on the metal layer 21 for half-time: please refer to FIG. 9 , at the position where the contact strip 13 is collected, the contacts 131 connected to the corresponding sensing strips 14 are respectively reserved, and the contacts are respectively The point 131 is used for electrical connection with the external chip, and the region of the collection contact 13 other than the three electric contacts 131 (ie, the half-notch 211) is etched, as shown in FIG. As shown, the sensing strips 14 at the position of the upper metal layer 21 are separated from each other by the half-notch 211.

Then, in accordance with the steps of the first embodiment, until the step d) is performed, in addition to etching the sensing contact 11 according to the first embodiment, the structure of the collecting contact 13 is punched out on the metal film 2 . And the structure of the plurality of sensing strips 14 is punched out to produce a complete skin electrode 1 structure.

According to the method for producing a skin electrode of the present invention, a thinner and thinner skin electrode can be produced by the method, and the method for producing the skin electrode is simple and the production efficiency is high.

The above is only a few embodiments of the present invention, and various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention.

Claims

A method for fabricating a skin electrode, wherein the skin electrode has a sensing contact, and the method for manufacturing the skin electrode comprises the following steps:

a) providing a metal film: the metal film includes an upper metal layer and a lower metal layer, and a plastic layer is interposed between the upper metal layer and the lower metal layer;

b) perforation: performing a perforation operation at a position on the metal film where the sensing contact is to be formed;

c) potting: filling a plurality of the perforations with a conductive paste to electrically connect the upper metal layer and the lower metal layer through the conductive paste;

d) Full Engraving: The structure of the sensing contact is punched out on the metal film.
The method of fabricating a skin electrode according to claim 1, wherein in the step a), the thickness of the upper metal layer and the thickness of the lower metal layer are both 50 nm to 200 nm, and the plastic layer The thickness is from 0.5 μm to 25 μm.
The method of producing a skin electrode according to claim 1, wherein in the step b), the perforation has a pore diameter of 0.1 mm to 0.3 mm.
The method of fabricating a skin electrode according to claim 1, wherein an ultrasonic cleaning operation is performed on a plurality of the perforations on the metal film before performing the step c).
The method of fabricating a skin electrode according to claim 1, wherein the sensing contact has a plurality of hollow holes, and the step d) comprises the following steps:

D1) the inner side is fully engraved: a plurality of the hollow holes of the sensing contact piece are punched out on the metal film;

D2) All external engraving: After the step d1) is completed, the outer edge of the sensing contact is punched out on the metal film.
A method of fabricating a skin electrode according to claim 5, wherein said metal film is adhered to a plastic base film before said step d), in said step d1), And cutting each of the hollow holes of the sensing contact on the metal film and the plastic base film.
A method of fabricating a skin electrode according to claim 6, wherein in said step d2), an outer edge of said sensor contact is die-cut on said metal film.
The method of fabricating a skin electrode according to claim 7, wherein after the step d2) is completed, the sensing contact piece and the scrap metal film separated from each other are formed on the plastic base film. The scrap metal film is peeled off from the plastic base film, and the sensing contact is adhered to the plastic base film.
A method of fabricating a skin electrode according to claim 1, wherein in said step d), The overcutting cutter performs a punching operation on the metal film to form the sensing contact, wherein the shape of the punching blade of the punching cutter is the same as the contour shape of the sensing contact.
The method for fabricating a skin electrode according to any one of claims 1 to 9, wherein the skin electrode comprises a collecting contact piece and a plurality of spaced apart sensing contact pieces, the sensing contact piece and the sensor The collecting contacts are connected by the sensing strips, and between the step b) and the step c), the step b1) is further included: the metal layer is half-cut: the lower metal layer is punched to the lower metal A half-line is formed on the layer, the half-line being on the sensing strip.
The method for fabricating a skin electrode according to claim 10, further comprising the step b2) between the step b1) and the step c): half-cutting the metal layer: die-cutting the upper metal layer, A half-notch is formed at a position where the upper metal layer corresponds to the collection contact, and the plurality of sensing contacts are separated from each other by the half-notch.
The method of fabricating a skin electrode according to claim 11, wherein the step d) further comprises the steps of: punching out the structure of the collecting contact piece on the metal film and punching out a plurality of places The structure of the sensing strip.