阅读说明：本技术 一种银浆的检测方法 (Silver paste detection method ) 是由 胡继林 沈剑 于 2020-03-25 设计创作，主要内容包括：本发明提供一种银浆的检测方法,涉及导电银浆性能检测领域,所述方法包括步骤1：采用铝合金网框和聚酯网布制成银浆检测网板；步骤2：使用银浆印刷菲林图案,包括第一折线段、第二折线段、第三折线段、矩形块、第四折线段以及等边三角形串线；步骤3：测量第一折线段、第二折线段、第三折线段、第四折线段的电阻R1、R2、R3、R4；步骤4：判断银浆的电阻性能,电阻与线宽的比例离散程度,印刷质量,不同宽度下相同银浆的附着力、弯折、硬度,印刷适宜方向。本发明能够一次印刷判断银浆的电阻性能,电阻与线宽的比例离散程度,印刷质量,不同宽度下相同银浆的附着力、弯折、硬度,提高银浆检测效率。(The invention provides a detection method of silver paste, and relates to the field of conductive silver paste performance detection, wherein the method comprises the following steps of 1: preparing a silver paste detection screen plate by adopting an aluminum alloy screen frame and polyester screen cloth; step 2: printing a film pattern by using silver paste, wherein the film pattern comprises a first broken line segment, a second broken line segment, a third broken line segment, a rectangular block, a fourth broken line segment and an equilateral triangle string; and step 3: measuring the resistances R1, R2, R3 and R4 of the first broken line segment, the second broken line segment, the third broken line segment and the fourth broken line segment; and 4, step 4: judging the resistance performance of the silver paste, the proportional dispersion degree of the resistance and the line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths and the suitable printing direction. The silver paste detection device can judge the resistance performance of the silver paste, the proportional dispersion degree of resistance and line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths through one-time printing, and improve the detection efficiency of the silver paste.)

1. The method for detecting the silver paste is characterized by comprising the following steps:

step 1: preparing a silver paste detection screen plate by adopting an aluminum alloy screen frame and polyester screen cloth;

step 2: use silver thick liquid printing film pattern, including first broken line segment, second broken line segment, third broken line segment, rectangular block, fourth broken line segment and equilateral triangle string line, the length of first broken line segment, second broken line segment, third broken line segment, fourth broken line segment is the same, and the width proportion of first broken line segment, second broken line segment, third broken line segment is 4: 2: 1, the line widths of the second broken line segment and the fourth broken line segment are the same;

and step 3: measuring the resistances R1, R2, R3 and R4 of the first broken line segment, the second broken line segment, the third broken line segment and the fourth broken line segment;

and 4, step 4: judging the resistance performance of the silver paste, the proportional dispersion degree of the resistance and the line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths and the suitable printing direction.

2. The method for detecting silver paste according to claim 1, characterized in that: the first broken line segment, the second broken line segment and the third broken line segment are vertical broken line segments, and the fourth broken line segment is a transverse broken line segment.

3. The method for detecting silver paste according to claim 1, characterized in that: the line width of the first broken line segment is 0.4-0.6 mm, the line widths of the second broken line segment and the fourth broken line segment are 0.2-0.3 mm, and the line width of the third broken line segment is 0.1-0.15 mm.

4. The method for detecting silver paste according to claim 3, wherein the method comprises the following steps: the line width of the first broken line segment is 0.6mm, and the length of the first broken line segment is 2 m; the line width of the second broken line segment and the fourth broken line segment is 0.3mm, and the length of the second broken line segment and the fourth broken line segment is 2 m; the line width of the third broken line segment is 0.15mm, and the length is 2 m; the fourth broken line segment has a line width of 0.3mm and a length of 2 m.

5. The method for detecting silver paste according to claim 1, characterized in that: the step 4 of judging the resistance performance of the silver paste comprises the following steps:

step 4.1.1: comparing the resistance of the same pattern of the silver paste detection screen plates corresponding to different silver pastes;

step 4.1.2: if the resistance is larger, the resistance performance is worse, and if the resistance is smaller, the resistance performance is better;

step 4.1.3: if the resistance difference value between the first fold line sections is smaller than a preset threshold value, and the resistance difference value between the third fold line sections is larger than the preset threshold value, the resistance dispersion is large, and the silver paste with the larger resistance corresponding to the third fold line sections is not suitable for line printing of the line width corresponding to the third fold line sections.

6. The method for detecting silver paste according to claim 1, characterized in that: the step 4 of judging the proportional dispersion degree of the resistance and the line width comprises the following steps:

step 4.2.1: judging the difference values of the resistors R2 and 2R1 and the difference values of the resistors R3 and 4R 1;

step 4.2.2: if the difference value between R2 and 2R1 is greater than the preset threshold value, the method is not suitable for line printing of the line width corresponding to the second fold line segment, and if the difference value between R3 and 4R1 is greater than the preset threshold value, the method is not suitable for line printing of the line width corresponding to the third fold line segment.

7. The method for detecting silver paste according to claim 1, characterized in that: the step 4 of judging the printing quality of the silver paste comprises the following steps:

step 4.3.1: irradiating the rectangular block through a light source lamp, and observing bubbles, sand holes and leveling property; measuring the film thickness of the rectangular block by a roughness measuring instrument;

step 4.3.2: and measuring the resistance of the triangular string wire to judge the trailing degree of the expanded edge, wherein if the resistance is small, the trailing condition of the expanded edge is more serious.

8. The method for detecting silver paste according to claim 1, characterized in that: and 4, acquiring the adhesive force, bending and hardness of the same silver paste under different widths by judging the adhesive force, bending and hardness of the first broken line segment, the second broken line segment and the third broken line segment.

9. The method for detecting silver paste according to claim 1, characterized in that: the step 4 of judging the suitable printing direction of the silver paste comprises the following steps:

step 4.4.1: comparing the second and fourth break segment resistances R2 and R4;

step 4.4.2: a vertical printing direction is appropriate if the resistance R4 is greater than the resistance R2, and a lateral printing direction is appropriate if the resistance R4 is less than the resistance R2; if the difference between the resistor R4 and the resistor R2 is greater than the predetermined threshold, it is necessary to compare whether the line widths of the second and fourth broken line segments are the same.

Technical Field

The invention relates to the field of conductive silver paste performance detection, in particular to a silver paste detection method.

Background

The silver paste detection screen plate is used for detecting the performance of silver paste. Considering factors such as production cost, technology and effect of the silver paste detection screen plate, the existing silver paste detection screen plate is mainly made of a screen frame made of an aluminum alloy material and screen cloth made of materials such as polyester wires, nylon and stainless steel wires and is manufactured on the screen plate through a film design pattern. Different customer products are different, and silver thick liquid detects otter board size and pattern also are different, and most customers adopt and produce the silver thick liquid that the pattern is the same and detect otter board.

The existing silver paste detection mainly has the following problems:

1. user of silver paste: the silver paste detection screen plate is the same as that produced on the production line; however, under the condition that the silver paste feeding detection passes through, the problem that the silver paste cannot be used still occurs during production, because the silver paste detection screen plate is designed, the using process width of the silver paste is not made, and the problem occurs when the silver paste is used for production, so that economic loss is caused.

2. Developers of silver paste: the used silver paste detection screen plate can not identify and analyze the reasons of various situations of the silver paste, a plurality of processes are needed, the correlation reasons of the reasons can be found out through a plurality of operations, meanwhile, the abnormity needs to be eliminated, the situation that the silver paste can not be reacted on one silver paste detection screen plate as much as possible is avoided, and the detection efficiency is low;

3. silver paste manufacturer: when the silver paste detection screen plate which is the same as the client is adopted, the silver paste detection screen plate comprises screen plate patterns, and the defects that the clients are many, and the silver paste detection screen plates of the clients are different and too many are complicated are caused; even if the same silver paste detection screen plate is made, only the condition of the same test client can be simulated, and the method is not greatly helpful for accurately researching the silver paste performance.

Disclosure of Invention

In view of the above drawbacks of the prior art, an object of the present invention is to provide a method for detecting silver paste, which can determine resistance performance, a discrete degree of a ratio of resistance to line width, printing quality, adhesion, bending, and hardness of the same silver paste under different widths by one-time printing, and improve silver paste detection efficiency.

The invention provides a detection method of silver paste, which comprises the following steps:

step 1: preparing a silver paste detection screen plate by adopting an aluminum alloy screen frame and polyester screen cloth;

step 2: use silver thick liquid printing film pattern, including first broken line segment, second broken line segment, third broken line segment, rectangular block, fourth broken line segment and equilateral triangle string line, the length of first broken line segment, second broken line segment, third broken line segment, fourth broken line segment is the same, and the width proportion of first broken line segment, second broken line segment, third broken line segment is 4: 2: 1, the line widths of the second broken line segment and the fourth broken line segment are the same;

and step 3: measuring the resistances R1, R2, R3 and R4 of the first broken line segment, the second broken line segment, the third broken line segment and the fourth broken line segment;

and 4, step 4: judging the resistance performance of the silver paste, the proportional dispersion degree of the resistance and the line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths and the suitable printing direction.

In an embodiment of the invention, the first broken line segment, the second broken line segment, and the third broken line segment are vertical broken line segments, and the fourth broken line segment is a horizontal broken line segment.

In an embodiment of the invention, the line width of the first broken line segment is 0.4-0.6 mm, the line widths of the second broken line segment and the fourth broken line segment are 0.2-0.3 mm, and the line width of the third broken line segment is 0.1-0.15 mm.

In an embodiment of the invention, the line width of the first broken line segment is 0.6mm, and the length is 2 m; the line width of the second broken line segment and the fourth broken line segment is 0.3mm, and the length of the second broken line segment and the fourth broken line segment is 2 m; the line width of the third broken line segment is 0.15mm, and the length is 2 m; the fourth broken line segment has a line width of 0.3mm and a length of 2 m.

In an embodiment of the invention, the step 4 of determining the resistance performance of the silver paste includes:

step 4.1.1: comparing the resistance of the same pattern of the silver paste detection screen plates corresponding to different silver pastes;

step 4.1.2: if the resistance is larger, the resistance performance is worse, and if the resistance is smaller, the resistance performance is better;

step 4.1.3: if the resistance difference value between the first fold line sections is smaller than a preset threshold value, and the resistance difference value between the third fold line sections is larger than the preset threshold value, the resistance dispersion is large, and the silver paste with the larger resistance corresponding to the third fold line sections is not suitable for line printing of the line width corresponding to the third fold line sections.

In an embodiment of the present invention, the step 4 of determining the proportional dispersion degree of the resistance and the line width includes:

step 4.2.1: judging the difference values of the resistors R2 and 2R1 and the difference values of the resistors R3 and 4R 1;

step 4.2.2: if the difference value between R2 and 2R1 is greater than the preset threshold value, the method is not suitable for line printing of the line width corresponding to the second fold line segment, and if the difference value between R3 and 4R1 is greater than the preset threshold value, the method is not suitable for line printing of the line width corresponding to the third fold line segment.

In an embodiment of the present invention, the step 4 of determining the printing quality of the silver paste includes the steps of:

step 4.3.1: irradiating the rectangular block through a light source lamp, observing bubbles, sand holes and leveling property, and measuring the film thickness of the rectangular block through a roughness measuring instrument;

step 4.3.2: and measuring the resistance of the triangular string wire to judge the trailing degree of the expanded edge, wherein if the triangular tip is wide and the resistance is small, the trailing condition of the expanded edge is more serious.

In an embodiment of the invention, in the step 4, the adhesive force, bending and hardness of the same silver paste under different widths are obtained by judging the adhesive force, bending and hardness of the first broken line segment, the second broken line segment and the third broken line segment.

In an embodiment of the invention, the step 4 of determining the suitable printing direction of the silver paste includes the steps of:

step 4.4.1: comparing the second and fourth break segment resistances R2 and R4;

step 4.4.2: a vertical printing direction is appropriate if the resistance R4 is greater than the resistance R2, and a lateral printing direction is appropriate if the resistance R4 is less than the resistance R2; if the difference between the resistor R4 and the resistor R2 is greater than the predetermined threshold, it is necessary to compare whether the line widths of the second and fourth broken line segments are the same.

As described above, the detection method of silver paste of the present invention has the following beneficial effects: the silver paste detection device can judge the resistance performance of the silver paste, the proportional dispersion degree of resistance and line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths through one-time printing, and improve the detection efficiency of the silver paste.

Drawings

Fig. 1 is a schematic structural diagram of a silver paste detection screen disclosed in the embodiment of the invention.

The labels in the figure are: 1-a first broken line segment, 2-a second broken line segment, 3-a third broken line segment, 4-a rectangular block, 5-a fourth broken line segment, and 6-a triangular string.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

The invention provides a detection method of silver paste, which comprises the following steps:

step 1: preparing a silver paste detection screen plate by adopting an aluminum alloy screen frame and polyester screen cloth;

wherein, the polyester screen cloth adopts 300 mesh polyester screen cloth, and 50um, 300 mesh polyester screen cloth are more difficult than the current 250 mesh polyester screen cloth on the market, can be used for judging silver thick liquid passing difficulty degree.

Step 2: use silver thick liquid printing film pattern, including first broken line segment 1, second broken line segment 2, third broken line segment 3, rectangular block 4, fourth broken line segment 5 and equilateral triangle string line 6, as shown in fig. 1, first broken line segment 1, second broken line segment 2, third broken line segment 3, fourth broken line segment 5's length is the same, and first broken line segment 1, second broken line segment 2, third broken line segment 3's width proportion is 4: 2: 1, the line widths of the second fold line segment 2 and the fourth fold line segment 5 are the same;

the first broken line segment 1, the second broken line segment 2 and the third broken line segment 3 are vertical broken line segments, and the fourth broken line segment 5 is a transverse broken line segment; the line width of the first broken line section 1 is 0.4-0.6 mm, the line widths of the second broken line section 2 and the fourth broken line section 5 are 0.2-0.3 mm, and the line width of the third broken line section 3 is 0.1-0.15 mm;

specifically, the line width of the first broken line segment 1 is 0.6mm, and the length is 2 m; the line width of the second fold line segment 2 and the fourth fold line segment 5 is 0.3mm, and the length is 2 m; the line width of the third fold line section 3 is 0.15mm, and the length is 2 m; the fourth broken line segment 5 has a line width of 0.3mm and a length of 2 m.

And step 3: measuring the resistances R1, R2, R3 and R4 of the first broken line segment 1, the second broken line segment 2, the third broken line segment 3 and the fourth broken line segment 5;

and 4, step 4: judging the resistance performance of the silver paste, the proportional dispersion degree of the resistance and the line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths and the suitable printing direction.

(1) Judging the resistance performance of the silver paste: comparing the resistance of the same pattern of the silver paste detection screen plates corresponding to different silver pastes; if the resistance is larger, the resistance performance is worse, and if the resistance is smaller, the resistance performance is better, for example, two silver pastes are respectively used for detecting screen printing through the silver pastes, and if the same broken line segment is adopted, the resistance on the first silver paste detection plate is smaller than that on the second silver paste detection plate, the resistance performance of the first silver paste is better;

(2) judging the proportional dispersion degree of the resistance and the line width of the silver paste: compare first broken line section 1, second broken line section 2, the dispersion on the resistance proportion of third broken line section 3, judge the line width scope that the silver thick liquid is suitable for printing, judge promptly that the resistance of silver thick liquid begins the sudden change under many thin linewidths, the resistance value can exceed the proportional value, for example: whether R2 is larger than 2R1 or not, whether R3 is larger than 4R1 or not, and if the excess is too large, the corresponding silver paste is not suitable for circuit printing of the current line width; however, the small resistance of some silver paste printing fine lines is good, and meanwhile, the small resistance caused by too wide printing fine lines or large lower modulus (consumption) also occurs, for example, if R2 is close to 2R1, and R3 is larger than 4R1, it indicates that the silver paste is suitable for the line with the line width corresponding to the second fold line segment 2, if the line with the line width corresponding to the third fold line segment 3 is not very suitable, and if R3 is equal to or close to 4R1, it indicates that the silver paste is suitable for the line printing with the line width corresponding to the third fold line segment 3; if R2 is greater than 2R1 and R3 is greater than 4R1, the silver paste is suitable for line printing of the line width corresponding to the first broken line segment 1; ideally, the closer R2 is to 2R1, the better R3 is to 4R1, and the more different (i.e., the larger the resistance drift) is, the less suitable it is for printing the line width in this range;

(3) judging the printing quality (including bubbles, sand holes, film thickness, tail dragging, edge expanding degree and leveling property) of the silver paste: the rectangular block 4 is irradiated by a light source lamp to observe bubbles, sand holes and leveling property; measuring the film thickness of the rectangular block 4 by a roughness measuring instrument; the trailing degree of the expanded edge is judged by measuring the resistance of the triangular string wire 6, the more the expanded edge is serious, the more the triangle is expanded, the more the conductive silver paste adhered to the next triangle is, and the resistance is small; according to the difference of the resistance of the fourth fold segment 5 and the resistance of the second fold segment 2, the suitable direction of the customer routing printing (including horizontal routing, vertical routing and the like) is judged, if the resistance R4 is larger than the resistance R2, the suitable direction of vertical printing is obtained, and if the resistance R4 is smaller than the resistance R2, the suitable direction of horizontal printing is obtained;

(4) judging the adhesive force, bending and hardness of the silver paste under different widths: the adhesive force, the bending and the hardness of the same silver paste under different widths are obtained by testing the adhesive force, the bending and the hardness of the first broken line segment 1, the second broken line segment 2 and the third broken line segment 3; and, compare the relation of diffusion broadening, adhesive force of silver thick liquid of different linewidths.

(5) Judging the suitable printing direction of the silver paste: comparing the resistance R2 of the second broken line segment 2 with the resistance R4 of the fourth broken line segment 5; the vertical printing direction is appropriate if the resistance R4 is greater than the resistance R2, and the lateral printing direction is appropriate if the resistance R4 is less than the resistance R2.

In conclusion, the silver paste detection device can judge the resistance performance, the proportional dispersion degree of resistance and line width, the printing quality, the adhesive force, the bending and the hardness of the same silver paste under different widths and improve the detection efficiency of the silver paste by one-time printing. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.