An identification composition, its preparation method and application

Abstract

The present invention belongs to the field of inductor preparation, and particularly relates to an identification composition, a preparation method thereof and an application. The identification composition of the present invention comprises the following raw materials for preparation: a photosensitive material, a borosilicate material and a metal oxide; the metal oxide comprises at least one of cobalt oxide and chromium oxide. Adding a metal oxide to the identification composition of the present invention can significantly enhance the compactness of the identification layer, improve the recognition degree of the identification layer, prevent the identification layer from falling off, and at the same time, using an exposure and development technique during preparation can significantly improve the precision of the printed identification layer.

Description

Technical Field

[0001] The present invention belongs to the field of inductor preparation, and particularly relates to an identification composition, a preparation method thereof, and an application thereof. Background Art

[0002] Generally, some obvious identification patterns are required on inductor devices to facilitate people to identify the direction of the sensor. Currently, the identification in inductor devices generally uses ordinary printing technology, that is, screen printing technology. Among them, the positioning of printed identification generally uses two-point CCD alignment. However, due to the accuracy of two-point CCD alignment being about 10 μm, the accuracy is poor, and the position of the identified object printed on the inductor device will show a serious deviation phenomenon. In addition, the marking pattern is formed by printing a paste through a screen printing pattern, and the tension, mesh number, yarn thickness, wire diameter, etc. of the screen all affect the regularity of the pattern, that is, the accuracy of the identification pattern of the product. In addition, because the composition of the identification pattern is significantly different from the inductance layer of the inductor device, it is also necessary to meet the basic requirement that the printed identification pattern cannot affect the function of the inductor device, otherwise it may cause defects in the inductance layer such as discontinuity. Therefore, there is still a need to find a process with high accuracy of the identification pattern printed on the inductor device and high matching degree between the printed identification pattern and the inductor device. Summary of the Invention

[0003] Aiming at the problems such as poor accuracy of the printed identification pattern involved in the above-mentioned prior art, the present invention will provide an identification composition, a preparation method thereof, and an application thereof.

[0004] To achieve the above object, the specific technical solutions include the following:

[0005] An identification composition, comprising the following raw materials for preparation: a photosensitive material, a borosilicate material, and a metal oxide; the metal oxide includes at least one of cobalt oxide and chromium oxide.

[0006] By adding a metal oxide to the identification composition, the present invention can significantly enhance the compactness of the identification layer, improve the recognition degree of the identification layer, improve the adhesion of the identification layer to the inductor device substrate, and prevent the identification from falling off.

[0007] As a preferred embodiment of the present invention, the mass of the metal oxide is 5% - 25% of the total mass of the identification composition.

[0008] As a further preferred embodiment of the present invention, the mass of the metal oxide is 15% of the total mass of the identification composition.

[0009] Under the above content of the metal oxide, the identification for inductor prepared by the present invention has better recognition degree and compactness.

[0010] As a preferred embodiment of the present invention, the mass of the photosensitive material is 10% - 20% of the total mass of the photosensitive material and the borosilicate material; the mass of the borosilicate material is 90% - 80% of the total mass of the photosensitive material and the borosilicate material. Based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes raw material components with the following mass fractions: 43.5% - 60.9% alumina, 6.5% - 15% silica, 6.1 - 21.35% boron oxide, 0% - 6.25% lithium oxide, 0% - 9.45% sodium oxide, 0% - 4.2% calcium oxide.

[0011] As a further preferred embodiment of the present invention, based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes raw material components with the following mass fractions: 48% alumina, 12% silica, 15% boron oxide, 5% lithium oxide.

[0012] As a further preferred embodiment of the present invention, based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes raw material components with the following mass fractions: 56.55% alumina, 8.45% silica, 12.2% boron oxide, 5.4% sodium oxide, 2.4% calcium oxide.

[0013] As a further preferred embodiment of the present invention, the mass content of the photosensitive material is 10% - 20%.

[0014] The present invention can select different borosilicate materials, metal oxides and photosensitive materials to configure identification compositions of different colors, and prepare inductors with identification of different colors. The prepared identification has the advantages of high recognition and high density.

[0015] The preparation method of the identification composition includes the following steps: first, prepare the borosilicate material; then mix the photosensitive material, the borosilicate material and the metal oxide to obtain the identification composition.

[0016] As a preferred embodiment of the present invention, the mixing method is ball milling.

[0017] An inductor identification includes the above-mentioned identification composition.

[0018] A preparation method of the above-mentioned inductor identification includes the following steps: print the identification composition on a substrate to obtain a sample with an identification layer; after the sample with the identification layer is exposed and developed, perform post-treatment to obtain a sample with an identification layer.

[0019] In the present invention, a metal oxide, a photosensitive material, and a borosilicate material are first mixed evenly, and then the mixture is screen-printed onto the surface layer of a specimen. Then, exposure treatment is carried out on an exposure machine, and an optical curing reaction occurs during the exposure process. After that, the specimen with the exposure ended is placed in a Na2CO3 solution with a certain concentration for chemical etching reaction, leaving a special pattern. Then, debinding and sintering treatment are carried out to obtain a lithographic identification layer inductor containing an identification that can recognize the product direction or type, etc.

[0020] As a preferred embodiment of the present invention, the post-treatment includes cutting and sintering steps.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The identification composition of the present invention can significantly enhance the compactness of the identification layer, improve the recognition rate of the identification layer, and prevent the identification layer from falling off.

[0023] (2) The present invention uses exposure and development technology, which can significantly improve the accuracy of the printed identification layer and can be used for small-sized inductor device products. Description of the Drawings

[0024] Figure 1 It is a process flow chart for the preparation of a black identification pattern.

[0025] Figure 2 It is an effect diagram of the conventional marking paste (left) before sintering in Comparative Example 1 and the black identification composition (right) before sintering in Example 1.

[0026] Figure 3 It is a process flow chart for the preparation of a green identification pattern. Detailed Embodiments

[0027] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below through specific comparative examples and examples.

[0028] The process flow chart for the preparation of the black identification pattern in steps (3) of Embodiments 1 to 10 of the present invention is as Figure 1 shown, and specifically includes the following steps: The black identification composition is printed on a specimen 1 with a certain thickness using a screen printing process to form a uniformly flat specimen 2 with a photosensitive black identification layer. Then, the specimen with the photosensitive black identification layer is placed on an exposure machine (the special mask plate 3 contained is used to form the required identification pattern) for optical curing, and the exposure amount is 50 mJ / cm 3, then place the exposed photosensitive black identification layer sample on a developing machine with a Na2CO3 solution system with a mass concentration of 0.2% to chemically etch sample 4 for 13 s. Then, a specific color pattern 5 is formed at a specific position on the surface of the sample. Finally, through processes such as cutting and sintering, a black identification layer laminated inductor 6 is prepared.

[0029] Example 1

[0030] (1) Mix Al2O3 and SiO2 at mass fractions of 87% and 13% respectively to obtain mixed powder 1; mix B2O3, Na2O, and CaO at mass fractions of 61%, 27%, and 12% respectively to obtain mixed powder 2; the photoresist is labeled as photoresist 3 (Toray Industries, Inc., Japan, model D55G).

[0031] (2) First, prepare 6 portions of photosensitive paste compositions through the following steps: according to the mass fractions shown in serial number ① in Table 1, put mixed powder 1, mixed powder 2, and photoresist 3 into a planetary ball mill and stir and mix them evenly to obtain photosensitive paste compositions. Then, add black oxide Co3O4 with mass fractions of 0%, 5%, 10%, 15%, 20%, and 25% respectively to the 6 portions of photosensitive paste compositions (the mass fraction of Co3O4 is based on the total mass of the black oxide and the photosensitive paste composition, that is, based on the total mass of the black identification composition), and after fully mixing them, obtain black identification compositions 1 - 6.

[0032] (3) Print black identification compositions 1 - 6 on the sample, perform exposure and development, and then sinter under the same conditions to obtain sintered samples labeled as samples 1 - 6. The specific process flow is as Figure 1 shown.

[0033] Evaluate the cracks and surface mark recognition of the porcelain body of the sintered samples. When the product qualification rate ≥ 90% is grade A, the qualification rate ≥ 80% and < 90% is grade B, the qualification rate < 80% and ≥ 60% is grade C; the qualification rate < 60% is grade D; the qualification rate is sorted by an appearance machine. When the crack is less than 1% of the product, it is grade A (excellent); greater than 1% and less than 3% is grade B (good); greater than 3% and less than 5% is grade C (qualified); greater than 5% is grade D (unqualified). The recognition of the mark is judged by observing the color to see if it is clear.

[0034] Example 2

[0035] This example is different from Example 1 in that: in step (2), mixed powder 1, mixed powder 2, and photoresist 3 are mixed according to the mass fractions shown in serial number ② in Table 1 to prepare photosensitive paste compositions 7 - 12, and finally, the sintered samples are labeled as samples 7 - 12.

[0036] Example 3

[0037] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ③ in Table 1 to prepare the photosensitive paste compositions 13-18, and the finally sintered samples are labeled as samples 13-18.

[0038] Example 4

[0039] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ④ in Table 1 to prepare the photosensitive paste compositions 19-24, and the finally sintered samples are labeled as samples 19-24.

[0040] Example 5

[0041] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ⑤ in Table 1 to prepare the photosensitive paste compositions 25-30, and the finally sintered samples are labeled as samples 25-30.

[0042] Example 6

[0043] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ⑥ in Table 1 to prepare the photosensitive paste compositions 31-36, and the finally sintered samples are labeled as samples 31-36.

[0044] Example 7

[0045] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ⑦ in Table 1 to prepare the photosensitive paste compositions 37-42, and the finally sintered samples are labeled as samples 37-42.

[0046] Example 8

[0047] This example is different from Example 1 in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 3 are mixed according to the mass fractions shown in No. ⑧ in Table 1 to prepare the photosensitive paste compositions 43-48, and the finally sintered samples are labeled as samples 43-48.

[0048] Example 9

[0049] This embodiment is different from Embodiment 1 in that: in step (2), mixed powder 1, mixed powder 2, and photoresist 3 are mixed according to the mass fractions shown in No. ⑨ in Table 1 to prepare a photosensitive paste composition 49-54, and the finally sintered samples are marked as samples 49-54.

[0050] Embodiment 10

[0051] This embodiment is different from Embodiment 1 in that: in step (2), mixed powder 1, mixed powder 2, and photoresist 3 are mixed according to the mass fractions shown in No. ⑩ in Table 1 to prepare a photosensitive paste composition 55-60, and the finally sintered samples are marked as samples 55-60.

[0052] Comparative Example 1

[0053] Using a conventional screen printing process, first form the same pattern on the screen as in Embodiment 1, and then use a conventional marking paste to print a pattern on the specimen. The effect diagram is as Figure 2 shown.

[0054] Comparing the printing process of Embodiment 1 with that of Comparative Example 1, as Figure 2 shown, on the one hand, the position and shape of the pattern formed by the conventional marking paste will change to a certain extent before sintering; on the other hand, when the conventional marking paste uses a conventional screen printing process, since it is necessary to first form the pattern of the identification layer on the screen and then print, the production process of the pattern on the screen will cause changes in the tension and angle of the screen, etc., which will in turn cause a certain deformation of the printed pattern, resulting in poor position accuracy and irregular shape of the pattern printed by the marking paste. In Embodiment 1 of the present invention, the exposure and development process is adopted, and the pattern is obtained through the exposure and development process. There is no need to change the structure of the screen. The position accuracy of the pattern is high (±1μm), the shape is regular, and the compactness is good. It can be used to identify small-size inductor products.

[0055] Mass fractions of mixed powder 1, mixed powder 2, and photoresist 3 in Table 1, Nos. ①-⑩

[0056] Serial number Serial number Mixed powder 1 Mixed powder 2 Photoresist 3 Example 1 ① 50％ 35％ 15％ Example 2 ② 55％ 30％ 15％ Example 3 ③ 60％ 25％ 15％ Example 4 ④ 65％ 20％ 15％ Example 5 ⑤ 70％ 15％ 15％ Example 6 ⑥ 50％ 30％ 20％ Example 7 ⑦ 55％ 25％ 20％ Example 8 ⑧ 60％ 20％ 20％ Example 9 ⑨ 65％ 15％ 20％ Example 10 ⑩ 70％ 10％ 20％

[0057] Comprehensive evaluation of samples 1-60 in Table 2

[0058]

[0059]

[0060] As can be seen from Table 2, the best sample is sample 16 prepared when the photosensitive paste composition is prepared with mixed powder 1, mixed powder 2, and photoresist 3 at mass fractions of 60%, 25%, and 15% and contains 15% Co3O4. At this time, the recognition rate, crack evaluation, and comprehensive evaluation of this sample are all at grade A.

[0061] Under the same test conditions of E4982 + 16197A@500MHZ, high-frequency inductance samples of the same inductance 0201 with and without a black identification layer were tested, and two sets of inductance and Q-value data (10 samples in each group) were measured. The identification layer was prepared by the method of preparing Sample 16, that is, a photosensitive paste composition was prepared by mixing Powder 1, Powder 2, and photoresist 3 at a mass fraction of 60%, 25%, and 15%, and the identification layer was prepared when 15% Co3O4 was added. Table 3 shows the inductance and Q-value data of the high-frequency inductance samples of the same inductance 0201 with and without the identification layer.

[0062] Table 3 Inductance and Q-value of high-frequency inductance samples of the same inductance 0201 without and with an identification layer

[0063]

[0064]

[0065] The data in Table 3 above show that the electrical performance difference between the inductor product with a black identification layer and the product without an identification layer of the present invention is not significant, and the black identification layer can be used as the identification layer of the product.

[0066] The preparation process of the green identification pattern in steps (3) of Examples 11 to 15 of the present invention is as Figure 3 shown, and specifically includes the following steps: putting a photosensitive material (photoresist), a borosilicate material, and a non-ferrous metal oxide (Cr2O3) into a planetary ball mill and fully stirring and mixing them evenly to obtain a green identification composition, printing the green identification composition on Specimen 1 with a certain thickness through a screen printing process to form Specimen 2 with a uniform and flat photosensitive green identification layer, and then placing the specimen with the existing photosensitive green identification layer on an exposure machine (the special mask plate 3 contained is used to form the required identification pattern) for optical curing, with an exposure amount of 50 mJ / cm 3 , and then placing the exposed specimen with the photosensitive green identification layer on a developing machine containing a Na2CO3 solution system with a mass concentration of 0.2% for chemical etching of Specimen 4, with a developing time of 13 s, and then forming a specific color pattern 5 on the specimen surface. Finally, processes such as cutting and sintering are carried out to prepare the green identification layer laminated inductor 6.

[0067] Example 11

[0068] (1) Mix Al2O3 and SiO2 in a ratio of 80% and 20% by mass fraction to obtain Powder 1; mix B2O3 and Li2O in a ratio of 75% and 25% by mass fraction to obtain Powder 2; the photoresist is marked as photoresist 4 (Toray Industries, Inc., Japan, model D55G).

[0069] (2) Prepare 6 portions of photosensitive paste compositions through the following steps: According to the mass fractions shown in Serial No. ① in Table 4, put the mixed powder 1, mixed powder 2, and photoresist 3 into a planetary ball mill and stir and mix them evenly to obtain the photosensitive paste composition. Then, add non-ferrous metal oxides Cr2O3 with mass fractions of 0%, 5%, 10%, 15%, 20%, and 25% respectively (the mass fraction of Cr2O3 is calculated based on the total mass of the non-ferrous metal oxide and the photosensitive paste composition) to the 6 portions of photosensitive paste compositions respectively. After fully mixing them, obtain green marking compositions 1-6.

[0070] (3) Print the green marking compositions 1-6 on the specimens. After exposure and development, then sinter them under the same conditions to obtain the sintered samples marked as samples 1-6. The specific process flow is as Figure 3 shown.

[0071] Evaluate the cracks and surface marking recognition of the porcelain body of the sintered samples. When the product qualification rate ≥ 90% is grade A, the qualification rate ≥ 80% and < 90% is grade B, the qualification rate < 80% and ≥ 60% is grade C; the qualification rate < 60% is grade D; the qualification rate is sorted by an appearance machine. When the crack is less than 1% of the product, it is grade A (excellent); greater than 1% and less than 3% is grade B (good); greater than 3% and less than 5% is grade C (qualified); greater than 5% is grade D (unqualified). The recognition of the marking is judged by observing the color to see if it is clear.

[0072] Example 12

[0073] The difference between this example and Example 11 is that in step (2), the mixed powder 1, mixed powder 2, and photoresist 4 are mixed according to the mass fractions shown in Serial No. ② in Table 4 to prepare photosensitive paste compositions 7-11, and finally the sintered samples are marked as samples 7-11.

[0074] Example 13

[0075] The difference between this example and Example 11 is that in step (2), the mixed powder 1, mixed powder 2, and photoresist 4 are mixed according to the mass fractions shown in Serial No. ③ in Table 4 to prepare photosensitive paste compositions 13-18, and finally the sintered samples are marked as samples 13-18.

[0076] Example 14

[0077] The difference between this example and Example 11 is that in step (2), the mixed powder 1, mixed powder 2, and photoresist 4 are mixed according to the mass fractions shown in Serial No. ④ in Table 4 to prepare photosensitive paste compositions 19-24, and finally the sintered samples are marked as samples 19-24.

[0078] Example 15

[0079] Compared with Example 11, this example is different in that: in step (2), the mixed powder 1, the mixed powder 2, and the photoresist 4 are mixed according to the mass fractions shown in No. ⑤ in Table 4 to prepare the photosensitive paste composition 25-30, and the finally sintered samples are marked as samples 25-30.

[0080] Table 4 Mass fractions of the mixed powder 1, the mixed powder 2, and the photoresist 4 in Examples 11-15

[0081]

[0082]

[0083] Table 5 Comprehensive evaluation of samples 1-30

[0084]

[0085]

[0086] The method for preparing an identification combination by adding metal oxides to the photosensitive paste composition in the present invention, and then performing exposure and development process treatment on the printed identification composition. After post-treatment steps such as high-temperature sintering, a lithographic identification layer is obtained. The metal oxides can enhance the denseness of the identification layer, improve the recognition rate of the identification layer, and the identification layer has good adhesion on the inductor device substrate without falling off, solving the problem of the identification layer falling off caused by the poor matching between the conventional identification composition and the photosensitive porcelain paste.

[0087] In addition, the present invention further increases the strength and recognition rate of the identification layer by optimizing the proportion of each component in the identification composition.

[0088] Under the same E4982+16197A@500MHZ test conditions, the same-sense amount 0201 high-frequency inductor samples with a green identification layer and without an identification layer are tested, and two groups of inductance and Q value data (10 samples in each group) are measured. The green identification layer is prepared by the method of preparing sample 10, that is, the photosensitive paste composition is prepared by mixing the mixed powder 1, the mixed powder 2, and the photoresist 4 according to the mass fractions of 60%, 20%, and 20%, and 15% Co3O4 is added to prepare the identification layer. Table 6 shows the inductance and Q value data of the same-sense amount 0201 high-frequency inductor with a green identification layer and without an identification layer.

[0089] Table 6 Inductance and Q value data of the same-sense amount 0201 high-frequency inductor with a green identification layer and without an identification layer

[0090]

[0091]

[0092] It can be shown by the data in Table 6 above that the electrical performance differences between the inductor samples with the lithographic green identification layer of the present invention and the samples without the identification layer are not significant, and this green identification layer can be used as an identification.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An identification composition, characterized in that, It includes the following preparation raw materials: a photosensitive material, a borosilicate material, and a metal oxide; the metal oxide includes at least one of cobalt oxide and chromium oxide; the mass of the metal oxide is 5% - 25% of the total mass of the identification composition; the photosensitive material is a photoresist; the mass of the photosensitive material is 10% - 20% of the total mass of the photosensitive material and the borosilicate material; the mass of the borosilicate material is 90% - 80% of the total mass of the photosensitive material and the borosilicate material, and among them, based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes the following raw material components with mass fractions: 43.5% - 60.9% alumina, 6.5% - 15% silica, 6.1 - 21.35% boron oxide, 0% - 6.25% lithium oxide, 0% - 9.45% sodium oxide, 0% - 4.2% calcium oxide.

2. The identification composition according to claim 1, wherein The mass of the metal oxide is 15% of the total mass of the identification composition.

3. The identification composition according to claim 1, wherein Based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes the following raw material components with mass fractions: 48% alumina, 12% silica, 15% boron oxide, 5% lithium oxide.

4. The identification composition according to claim 1, wherein Based on the total mass of the photosensitive material and the borosilicate material, the borosilicate material includes the following raw material components with mass fractions: 56.55% alumina, 8.45% silica, 12.2% boron oxide, 5.4% sodium oxide, 2.4% calcium oxide.

5. A method for preparing the identification composition according to any one of claims 1 to 4, characterized in that, It includes the following steps: First, mix the raw materials of the borosilicate material to obtain the borosilicate material; then mix the photosensitive material, the borosilicate material, and the metal oxide to obtain the identification composition.

6. An identification for an inductor, characterized in that, It includes the identification composition according to any one of claims 1 - 4.

7. A method for preparing the inductor identifier according to claim 6, characterized in that, It includes the following steps: Print the identification composition according to any one of claims 1 - 4 on a substrate to obtain a specimen with an identification layer; after the specimen with the identification layer is exposed and developed, then perform post - treatment to obtain a sample with an identification layer.

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