Small-size MLCC (multilayer ceramic capacitor) end capping process

Abstract

The invention discloses a small-size MLCC end sealing process which comprises the following steps that S1, a first bonding piece, a second bonding piece and a plurality of MLCC semi-finished products are provided, the first bonding piece is provided with a first adhesive face, the second bonding piece is provided with a second adhesive face, and the viscosity of the second adhesive face is larger than that of the first adhesive face; s2, A-end electrodes of a plurality of MLCC semi-finished products are all pasted on the first adhesive surface, and B-end electrodes of the MLCC semi-finished products are exposed; s3, end sealing is carried out on a B-end electrode of the MLCC semi-finished product; s4, the B-end electrodes of the multiple MLCC semi-finished products treated in the S3 are all pasted on the second adhesive face, the second adhesive piece and the MLCC semi-finished products are transferred through the transfer equipment, the MLCC semi-finished products are separated from the first adhesive piece, and the A-end electrodes of the MLCC semi-finished products are exposed; and S5, end sealing is carried out on the A-end electrode of the MLCC semi-finished product. According to the method, the steps of multiple times of accurate alignment of the CP board are reduced, consumption of gummed paper can be reduced, the production efficiency is effectively improved, the product quality is stabilized, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of MLCC production, and in particular to a small-size MLCC end-capping process. Background Art

[0002] At present, in recent years, in order to improve production efficiency and reduce costs, some improved MLCC end-capping processes have emerged. In the production process of traditional ceramic components such as MLCC (chip multilayer ceramic capacitors), it is necessary to perform slurry end-capping on both sides of the exposed inner electrode. For example, in the Chinese patent application (publication number: CN 115763099 A), the CP carrier double-plate mode is usually used for slurry end-capping. First, glue is applied to one side of the CP board and then the MLCC is loaded and fixed. Then, one end of the MLCC is dipped in slurry; then, one end of the MLCC after slurry is transferred and inserted into the secondary CP board with tape, and the other end of the MLCC is dipped in slurry. However, this traditional process has the following defects: (1) Efficiency problem: In the traditional process, the CP carrier double-plate mode is used for slurry end-capping, which requires multiple precise alignments, that is, the tape on the A end of the MLCC is torn off through the guide plate and then transferred to the bearing hole on the CP board to seal the B end. This not only increases production time, but also increases the error rate; (2) Cost issues: Repeated use of CP boards and adhesive tape increases material costs; (3) Quality stability issues: Multiple transfers and alignments may cause product damage or inconsistency, affecting the stability of product quality. Summary of the invention

[0003] The purpose of the present invention is to provide a small-size MLCC end-capping process, which reduces the steps of multiple precise alignment of CP boards in the end-capping process, can reduce the consumption of adhesive tape, effectively improve production efficiency, stabilize product quality, and reduce production costs.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A small-size MLCC termination process comprises the following steps:

[0006] Step S1: providing a first adhesive sheet, a second adhesive sheet and a plurality of MLCC semi-finished products, wherein the first adhesive sheet is provided with a first adhesive surface, the second adhesive sheet is provided with a second adhesive surface, and the viscosity of the second adhesive surface is greater than the viscosity of the first adhesive surface; the two ends of the MLCC semi-finished product are respectively an A-end electrode and a B-end electrode;

[0007] Step S2: Paste all the A-end electrodes of the plurality of MLCC semi-finished products onto the first adhesive surface, exposing the B-end electrodes of the MLCC semi-finished products;

[0008] Step S3: performing slurry dipping and drying operations on the B-end electrode of the MLCC semi-finished product in sequence to complete the sealing of the B-end electrode of the MLCC semi-finished product;

[0009] Step S4: Paste all the B-end electrodes of the MLCC semi-finished products processed in step S3 onto the second adhesive surface, transfer the second adhesive sheet and the MLCC semi-finished products by using a transfer device, separate the MLCC semi-finished products from the first adhesive sheet, and expose the A-end electrodes of the MLCC semi-finished products; use the separated first adhesive sheet to seal the next batch of MLCC semi-finished products;

[0010] Step S5: performing slurry dipping and drying operations on the A-end electrode of the MLCC semi-finished product in sequence to complete the sealing of the A-end electrode of the MLCC semi-finished product.

[0011] As a preferred embodiment of the present invention, step S6 is also included: using a scraper to scrape the MLCC semi-finished product processed in step S5 off the second adhesive sheet to obtain a MLCC finished product, and using the separated second adhesive sheet for end sealing of the next batch of MLCC semi-finished products.

[0012] As a preferred embodiment of the present invention, in step S3 and step S5, the slurry used in the immersion operation of the MLCC semi-finished product is copper slurry.

[0013] As a preferred embodiment of the present invention, in step S3 and step S5, when the MLCC semi-finished product is subjected to drying operation, the temperature of the oven is 175°C.

[0014] As a preferred embodiment of the present invention, in the step S3, before the B-end electrode of the MLCC semi-finished product is dipped in slurry, the first adhesive sheet is leveled.

[0015] As a preferred embodiment of the present invention, in the step S5, before the A-end electrode of the MLCC semi-finished product is dipped in slurry, the second adhesive sheet is leveled.

[0016] As a preferred embodiment of the present invention, in step S3, after completing the sealing of the B-end electrode of the MLCC semi-finished product, the B-end electrode of the MLCC semi-finished product is inspected; if the sealing of the B-end electrode of the MLCC semi-finished product is unqualified, the B-end electrode of the MLCC semi-finished product is repeatedly dipped and dried in sequence until the sealing of the B-end electrode of the MLCC semi-finished product is qualified.

[0017] As a preferred embodiment of the present invention, in step S5, after completing the sealing of the A-end electrode of the MLCC semi-finished product, the A-end electrode of the MLCC semi-finished product is inspected; if the sealing of the end electrode of the MLCC semi-finished product is unqualified, the slurry dipping and drying operations are repeated in sequence on the A-end electrode of the MLCC semi-finished product until the sealing of the A-end electrode of the MLCC semi-finished product is qualified.

[0018] As a preferred solution of the present invention, a first stainless steel bearing plate is fixedly connected to a side surface of the first adhesive sheet away from the first adhesive surface; a second stainless steel bearing plate is fixedly connected to a side surface of the second adhesive sheet away from the second adhesive surface.

[0019] The small-size MLCC termination process provided by the present invention has the following beneficial effects compared with the prior art:

[0020] The present invention adheres one end electrode of a small-sized MLCC semi-finished product through the first adhesive surface of the first adhesive sheet and the second adhesive surface of the second adhesive sheet, and exposes the corresponding surface of the MLCC semi-finished product that needs to be sealed. Compared with the prior art that uses a CP board for sealing, the steps of multiple precise alignment of the CP board are reduced during the sealing process; at the same time, the first adhesive sheet and the second adhesive sheet can be reused multiple times, thereby reducing the consumption of adhesive tape, effectively improving production efficiency, stabilizing product quality, and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0022] Figure 1 This is a flow chart of a small-size MLCC termination process provided by an embodiment of the present invention;

[0023] Figure 2 It is Figure 1 A magnified view of region A in the structure shown;

[0024] Figure 3 It is Figure 1 A magnified view of region B in the structure shown;

[0025] Figure 4 It is Figure 1 Magnified view of region C in the structure shown.

[0026] Markings in the figure:

[0027] 1. First adhesive sheet; 11. First adhesive surface; 12. First stainless steel carrier plate; 2. First adhesive sheet; 21. First adhesive surface; 22. First stainless steel carrier plate; 3. MLCC semi-finished product; 31. A-end electrode; 32. B-end electrode; 4. Scraper. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0030] See also Figures 1 to 4 The preferred embodiment of the present invention provides a small-size MLCC termination process, which includes the following steps:

[0031] Step S1: Provide a first adhesive sheet 1, a second adhesive sheet 2 and a plurality of MLCC semi-finished products 3, wherein the first adhesive sheet 1 is provided with a first adhesive surface 11, the second adhesive sheet 2 is provided with a second adhesive surface 21, and the viscosity of the second adhesive surface 21 is greater than the viscosity of the first adhesive surface 11; the two ends of the MLCC semi-finished product 3 are respectively an A-end electrode 31 and a B-end electrode 32.

[0032] Step S2: Figure 1 (a) to (b) and Figure 2 As shown, the A-end electrodes 31 of several MLCC semi-finished products 3 are all pasted on the first adhesive surface 11, exposing the B-end electrodes 32 of the MLCC semi-finished products 3.

[0033] Step S3: Figure 1 (c) and Figure 3 As shown, the B-end electrode 32 of the MLCC semi-finished product 3 is sequentially dipped and dried to complete the sealing of the B-end electrode 32 of the MLCC semi-finished product 3; wherein, the slurry used in the dipping operation of the MLCC semi-finished product 3 is preferably copper slurry; when the MLCC semi-finished product 3 is dried, the temperature of the oven is preferably 175°C.

[0034] Step S4: Figure 1As shown in (d), the B-end electrodes 32 of the MLCC semi-finished products 3 processed in step S3 are all pasted on the second adhesive surface 21; Figure 1 As shown in (e), the second adhesive sheet 2 and the MLCC semi-finished product 3 are transferred by a transfer device, so that the MLCC semi-finished product 3 is separated from the first adhesive sheet 1, and the A-end electrode 31 of the MLCC semi-finished product 3 is exposed; the separated first adhesive sheet 1 is used for the end sealing of the next batch of MLCC semi-finished products 3;

[0035] Step S5: Figure 1 (f) and Figure 4 As shown, the A-end electrode 31 of the MLCC semi-finished product 3 is dipped and dried in sequence to complete the end capping of the A-end electrode 31 of the MLCC semi-finished product 3. The slurry used in the dip operation of the MLCC semi-finished product 3 is preferably copper slurry; when the MLCC semi-finished product 3 is dried, the temperature of the oven is preferably 175°C.

[0036] According to the small-size MLCC end-capping process of the present invention, one end electrode of the small-size MLCC semi-finished product 3 is correspondingly adhered by the first adhesive surface 11 of the first adhesive sheet 1 and the second adhesive surface 21 of the second adhesive sheet 2, and the corresponding surface of the MLCC semi-finished product 3 that needs to be end-capped is exposed. Compared with the operation of using a CP board for end-capping in the prior art, the steps of multiple precise alignment of the CP board are reduced in the end-capping process; at the same time, the first adhesive sheet 1 and the second adhesive sheet 2 can be reused multiple times, thereby reducing the consumption of adhesive tape, effectively improving production efficiency, stabilizing product quality, and reducing production costs.

[0037] For example, Figure 1 As shown in (g), the small-size MLCC end-capping process of the present invention further includes step S6: using a scraper 4 to scrape the MLCC semi-finished product 3 processed in step S5 off the second adhesive sheet 2 to obtain a MLCC finished product; Figure 1 As shown in (h), the separated second adhesive sheet 2 is used for sealing the next batch of MLCC semi-finished products 3.

[0038] Exemplarily, in the step S3, the first adhesive sheet 1 is leveled before the B-end electrode 32 of the MLCC semi-finished product 3 is dipped; in the step S5, the second adhesive sheet 2 is leveled before the A-end electrode 31 of the MLCC semi-finished product 3 is dipped. Thus, the end face height of the MLCC semi-finished product 3 when it is adhered to the first adhesive sheet 1 or the second adhesive sheet 2 can be completely consistent, thereby facilitating the subsequent end-capping operation and significantly improving the production quality and reliability of MLCC products.

[0039] Exemplarily, in order to improve the quality of MLCC products, in the step S3, after the end-capping of the B-terminal electrode 32 of the MLCC semi-finished product 3 is completed, the B-terminal electrode 32 of the MLCC semi-finished product 3 is inspected (i.e., whether the end top appearance, end width size, R angle, etc. of the B-terminal electrode 32 meet the production requirements); if the end-capping of the B-terminal electrode 32 of the MLCC semi-finished product 3 is unqualified, the B-terminal electrode 32 of the MLCC semi-finished product 3 is repeatedly dipped and dried in sequence until the B-terminal electrode 3 of the MLCC semi-finished product 3 is unqualified. The end sealing of the terminal electrode 32 is qualified; in the step S5, after completing the end sealing of the A-end electrode 31 of the MLCC semi-finished product 3, the A-end electrode 31 of the MLCC semi-finished product 3 is inspected (that is, whether the end top appearance, end width size, R angle, etc. of the A-end electrode 31 meet the production requirements); if the end sealing of the terminal electrode of the MLCC semi-finished product 3 is unqualified, the A-end electrode 31 of the MLCC semi-finished product 3 is repeatedly dipped and dried in sequence until the end sealing of the A-end electrode 31 of the MLCC semi-finished product 3 is qualified.

[0040] Exemplarily, in order to enhance the bearing capacity of the adhesive sheet and facilitate use, a first stainless steel bearing plate 12 is fixedly connected to the side surface of the first adhesive sheet 1 away from the first adhesive surface 11; a second stainless steel bearing plate 22 is fixedly connected to the side surface of the second adhesive sheet 2 away from the second adhesive surface 21.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A small-size MLCC termination process, characterized in that: The steps include: Step S1: providing a first adhesive sheet, a second adhesive sheet and a plurality of MLCC semi-finished products, wherein the first adhesive sheet is provided with a first adhesive surface, the second adhesive sheet is provided with a second adhesive surface, and the viscosity of the second adhesive surface is greater than the viscosity of the first adhesive surface; the two ends of the MLCC semi-finished product are respectively an A-end electrode and a B-end electrode; Step S2: pasting all the A-end electrodes of the plurality of MLCC semi-finished products onto the first adhesive surface, exposing the B-end electrodes of the MLCC semi-finished products; Step S3: performing slurry dipping and drying operations on the B-end electrode of the MLCC semi-finished product in sequence to complete the sealing of the B-end electrode of the MLCC semi-finished product; Step S4: Paste all the B-end electrodes of the MLCC semi-finished products processed in step S3 onto the second adhesive surface, transfer the second adhesive sheet and the MLCC semi-finished products by using a transfer device, separate the MLCC semi-finished products from the first adhesive sheet, and expose the A-end electrodes of the MLCC semi-finished products; use the separated first adhesive sheet to seal the next batch of MLCC semi-finished products; Step S5: performing slurry dipping and drying operations on the A-end electrode of the MLCC semi-finished product in sequence to complete the sealing of the A-end electrode of the MLCC semi-finished product.

2. The small-size MLCC termination process according to claim 1, characterized in that: The method further includes step S6: using a scraper to scrape the MLCC semi-finished product processed in step S5 off the second adhesive sheet to obtain a MLCC finished product, and using the separated second adhesive sheet to seal the next batch of MLCC semi-finished products.

3. The small-size MLCC termination process according to claim 1, characterized in that: In the step S3 and the step S5, the slurry used in the immersion operation of the MLCC semi-finished product is copper slurry.

4. The small-size MLCC termination process according to claim 1, characterized in that: In the step S3 and the step S5, when the MLCC semi-finished product is dried, the temperature of the oven is 175°C.

5. The small-size MLCC termination process according to claim 1, characterized in that: In the step S3, before the B-end electrode of the MLCC semi-finished product is dipped in slurry, the first adhesive sheet is leveled.

6. The small-size MLCC termination process according to claim 1, characterized in that: In the step S5, before the A-end electrode of the MLCC semi-finished product is dipped in slurry, the second adhesive sheet is leveled.

7. The small-size MLCC termination process according to claim 1, characterized in that: In the step S3, after completing the sealing of the B-end electrode of the MLCC semi-finished product, the B-end electrode of the MLCC semi-finished product is inspected; if the sealing of the B-end electrode of the MLCC semi-finished product is unqualified, the B-end electrode of the MLCC semi-finished product is repeatedly dipped and dried in sequence until the sealing of the B-end electrode of the MLCC semi-finished product is qualified.

8. The small-size MLCC termination process according to claim 1, characterized in that: In the step S5, after completing the sealing of the A-end electrode of the MLCC semi-finished product, the A-end electrode of the MLCC semi-finished product is inspected; if the sealing of the end electrode of the MLCC semi-finished product is unqualified, the A-end electrode of the MLCC semi-finished product is repeatedly dipped in slurry and dried in sequence until the sealing of the A-end electrode of the MLCC semi-finished product is qualified.

9. The small-size MLCC termination process according to claim 1, characterized in that: A first stainless steel bearing plate is fixedly connected to a side surface of the first adhesive sheet away from the first adhesive surface; a second stainless steel bearing plate is fixedly connected to a side surface of the second adhesive sheet away from the second adhesive surface.

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