CN217373838U

CN217373838U - A fine bars half tone structure for silk screen production line

Info

Publication number: CN217373838U
Application number: CN202220091179.6U
Authority: CN
Inventors: 刘冬; 万柳斌
Original assignee: Tonghe New Energy Jintang Co ltd
Current assignee: Tonghe New Energy Jintang Co ltd
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-09-06
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a fine bars half tone structure for silk screen production line belongs to half tone structure technical field. The utility model discloses a half tone and the half tone holding surface that is used for supporting in the half tone bottom, be equipped with the high temperature resistant sticky tape layer that is the rectangle structure between half tone and the half tone holding surface, and the half tone is located high temperature resistant sticky tape layer surface central point and puts. To the technical problem who exists among the prior art, the utility model discloses plan to provide a fine grid half tone structure for line is produced to silk screen, under the prerequisite that does not influence attributes such as the printing screen of No. four machines such as printing screen of penetrating black nature, resolution nature, tension and precision and product quality, can solve the wearability that effectively increases No. four machines printing screen to promote its production life, reduction in production cost promotes the productivity.

Description

A fine bars half tone structure for silk screen production line

Technical Field

The utility model belongs to the technical field of the half tone structure, more specifically say, relate to a fine bars half tone structure for silk screen production line.

Background

The photovoltaic solar silicon wafer is a core part in a solar power generation system and is also the part with the highest value in the solar power generation system. The photovoltaic solar silicon wafer is used for converting solar energy into electric energy, and the electric energy is sent to a storage battery to be stored or directly used for pushing a load to work. The quality and cost of photovoltaic solar silicon wafers will directly determine the quality and cost of the entire solar power system. One of the most critical steps in the screen printing of photovoltaic solar silicon wafers is the fabrication of very fine circuits on the front and back surfaces of the silicon wafer, and such metal plating processes are usually performed by screen printing techniques, i.e., by imprinting a conductive paste containing metal on the silicon wafer through the mesh of a screen to form a circuit or electrode.

In the current PERC cell in the industry, the production process of the cell comprises the processes of texturing, diffusion, wet etching, ALD, film coating, silk screen printing, sintering test and the like. The silk-screen printing process is an indispensable process in the production process of solar cells, at present, the silk-screen printing mode of an SE + PERC conventional production line is distributed printing, a back electrode is printed, a back electric field is printed for two times, a main grid is printed for three times, fine grid lines are printed for four times, the service life of a screen plate of a fourth machine is generally short in the existing photovoltaic production companies, the production cost is high, and the problem that the productivity is not up to the standard is caused by frequently replacing the screen plate.

Through retrieval, some patents have been published about the screen plate structure of the screen production line, for example, the chinese patent application No. is: 202022910506X, discloses a solar double-sided structure screen printing plate, which comprises a screen frame and a metal wire mesh, wherein the metal wire mesh is stretched on the screen frame through a stretching wire mesh, the metal wire mesh woven by a plurality of metal weft threads and metal warp threads in a staggered manner comprises a scraping side and a pasting side which are opposite, the scraping side of the metal wire mesh is provided with a photosensitive emulsion layer, a plurality of photosensitive layer wire slots are arranged on the photosensitive emulsion layer, the pasting side of the metal wire mesh is pasted with a high polymer pasting film layer, the high polymer pasting film layer is provided with a plurality of pasting film layer wire slots, the pasting film layer wire slots form printed patterns, the photosensitive layer wire slots correspond to the pasting film layer wire slots, and the width a' of the corresponding photosensitive layer wire slots is larger than the width a of the pasting film layer wire slots; the scraping surface of the photosensitive emulsion layer is equal to or higher than the screen scraping surface of the metal screen. The solar double-sided structure screen printing plate can not form laser etching residues, can not generate slurry drying impurities, and has the characteristics of high screen printing quality and long service life.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

To the technical problem who exists among the prior art, the utility model discloses plan to provide a fine bars half tone structure for line is produced to silk screen, under the prerequisite that does not influence the penetrating black nature of No. four quick-witted half tones, attribute such as resolution nature, tension and precision and product quality, can solve the wearability that effectively increases No. four quick-witted half tones to promote its production life, reduction in production cost promotes the productivity.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model discloses a fine bars half tone structure for silk screen production line, include half tone and be used for supporting the half tone holding surface in the half tone bottom, be equipped with the high temperature resistant adhesive tape layer that is the rectangle structure between half tone and the half tone holding surface, and the half tone is located high temperature resistant adhesive tape layer surface central point and puts.

As a further improvement, the silver dragon adhesive tape layer with the rectangular structure is further arranged between the screen printing plate and the high temperature resistant adhesive tape layer, the screen printing plate is arranged at the surface center position of the silver dragon adhesive tape layer, and the screen printing plate is arranged at the surface center position of the high temperature resistant adhesive tape layer.

As a further improvement, the half tone includes that the printing is regional, and printing is regional around for non-printing region, wherein is equipped with silver dragon sticky tape chamfer on four angles of non-printing region, and silver dragon sticky tape chamfer links to each other four angles and silver dragon sticky tape layer that non-printing is regional.

As a further improvement, the silver dragon adhesive tape chamfer is of a trapezoidal structure, the trapezoidal minor face of the silver dragon adhesive tape chamfer is connected with the non-printing area, and the trapezoidal long edge of the silver dragon adhesive tape chamfer is connected with the silver dragon adhesive tape layer.

As a further improvement of the utility model, the silver dragon adhesive tape layer has more than one layer, and the thickness of the silver dragon adhesive tape layer is 40mm-60 mm.

As a further improvement of the utility model, the thickness of the high temperature resistant adhesive tape layer is 20mm-40 mm.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a fine bars half tone structure for silk screen production line, the half tone gets into the workshop after, to half tone non-printing region all around paste high temperature resistant adhesive tape layer and silver dragon adhesive tape layer secondary reinforcement processing under the prerequisite that does not influence product quality, increase mechanical tension, at half tone and silicon chip, wear-resisting high temperature resistant adhesive tape is pasted in the non-printing region of mesa contact, not only can effectively increase half tone border position wear-resisting, characteristics such as anti bundle, can also increase half tone printing region, with the half tone holding surface, step thickness between, thereby promote No. four quick-witted half tone life and improve by a wide margin, and the production cost is reduced, and the productivity is promoted.

(2) The utility model discloses a fine bars half tone structure for silk screen production line is promoting under half tone life prerequisite, can not influence the printability of half tone to guarantee that the printing quality of product is not influenced, simultaneously because the promotion of half tone life-span can effectively reduce to produce the line and change half tone frequency, reduce the productivity loss, reach reduce cost's purpose.

(3) The utility model discloses a fine bars half tone structure for line is produced to silk screen reaches the chamfer position around the regional outside of silicon chip contact surface printing and adopts silver dragon abrasive tape to carry out the secondary and consolidate and handle and prevent to prick the half tone.

Drawings

Fig. 1 is a schematic structural view of a fine grid screen printing plate structure for a screen production line in a normal working state of the utility model.

The reference numbers in the figures are:

1. a printing area; 2. a non-printing area; 3. a silver dragon adhesive tape layer; 4. chamfering with silver dragon adhesive tape; 5. a high temperature resistant adhesive tape layer; 6. and a screen plate supporting surface.

Detailed Description

For a further understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

Aiming at the production of the PEEC single crystal cell, the current screen production line generally encounters the following problems: firstly, the service life of the screen printing plate does not reach the standard, and the production cost is seriously influenced; on the other hand, a large amount of production capacity is delayed when the screen printing plate is replaced. One of the current production line throughput impacts on Top3 is the delayed throughput when changing screens. The screen printing plates of the fourth machine used by various manufacturers are all in the state when the screen printing plates leave factory, so that the screen printing plates with abnormal conditions are easy to be off-line in the printing process. Mainly caused by several factors: 1. with the increase of the production capacity of a production line, the printing speed is increased, so that the screen printing plate is worn out and taken off the line due to the fact that the screen printing plate frequently contacts the edge of the silicon wafer in the printing process; 2. a scraper and an ink knife inside the screen printing plate frequently move to rub a printing surface, so that the screen printing plate is worn; 3. the sanitation inside the machine table is not thorough, and foreign matters can not puncture the edge of the screen printing plate, so that the screen printing plate can be broken.

The fine grid screen plate structure for the screen production line can effectively solve the problems, effectively prolongs the service life of the screen plate and reduces the production cost. As shown in fig. 1, in the present embodiment, the screen printing apparatus includes a screen printing plate and a screen printing plate supporting surface 6 for supporting the bottom of the screen printing plate, a rectangular high temperature resistant tape layer 5 is disposed between the screen printing plate and the screen printing plate supporting surface 6, the periphery of the high temperature resistant tape layer 5 extends beyond the peripheral edge of the screen printing plate, and the screen printing plate is located at the center of the surface of the high temperature resistant tape layer 5. Wherein still be equipped with the silver dragon sticky tape layer 3 that is the rectangle structure between half tone and high temperature resistant sticky tape layer 5, the half tone is located the surperficial central point that silver dragon sticky tape layer 3 puts, and the half tone is located and is located the surperficial central point of high temperature resistant sticky tape layer 5 and put, and through the first reinforcement on silver dragon sticky tape layer 3, can protect the half tone more effectively, promote its life. After the half tone gets into the workshop in this embodiment, 3 secondary reinforcement processing on half tone non-printing region 2 paste high temperature resistant adhesive tape layer 5 and silver dragon adhesive tape layer all around under the prerequisite that does not influence product quality, increase mechanical tension, at half tone and silicon chip, wear-resisting high temperature resistant adhesive tape is pasted in the non-printing region 2 of mesa contact, not only can effectively increase half tone border position wear-resisting, characteristics such as anti prick, can also increase the step thickness between half tone printing region 1 and the half tone holding surface 6, thereby promote No. four quick-witted half tone life-span and improve by a wide margin, and the reduction in production cost promotes the productivity.

The screen plate in this embodiment includes printing area 1, and printing area 1 is regional 2 for non-printing around, is equipped with silver dragon sticky tape chamfer 4 on the four angles of regional 2 of non-printing wherein, and silver dragon sticky tape chamfer 4 links to each other four angles and silver dragon sticky tape layer 3 of regional 2 of non-printing. Silver dragon sticky tape chamfer 4 can effectively carry out further reinforcement to four angles in half tone non-printing region 2, prevents that the edge of half tone from appearing wearing and tearing. Wherein silver dragon sticky tape chamfer 4 is the trapezium structure, 4 trapezoidal minor faces of silver dragon sticky tape chamfer link to each other with

non-printing region

2, and 4 trapezoidal long limits of silver dragon sticky tape chamfer link to each other with silver dragon sticky tape layer 3, have effectively increased the area of contact at four angles with the non-printing region 2 of half tone for the marginal position intensity of the non-printing region 2 of half tone further obtains firmly. In the embodiment, the silver adhesive tape layer 3 is more than one layer, the thickness of the silver adhesive tape layer 3 is 40mm-60mm, and the thickness of the high-temperature-resistant adhesive tape layer 5 is 20mm-40 mm. Specifically, in the embodiment, the silver dragon adhesive tape layer 3 is two layers, the thickness of the silver dragon adhesive tape layer 3 is 40mm, and the thickness of the high temperature resistant adhesive tape layer 5 is 20 mm.

In the embodiment, silver dragon wear-resistant adhesive tapes are adopted to perform secondary reinforcement treatment on the periphery and the chamfer position outside the printing area 1 of the contact surface of the silicon wafer to prevent the screen printing plate from being punctured. The half tone structure of this embodiment can not influence the printability of half tone under the promotion half tone life-span prerequisite to guarantee that the printing quality of product is not influenced, simultaneously because the promotion in half tone life-span can effectively reduce and produce the line and change half tone frequency, reduce the productivity loss, reach reduce cost's purpose.

Example 2

The basic structure of the fine grid screen plate structure for the screen production line of the present embodiment is consistent with that of embodiment 1, and the difference is that in the present embodiment, the silver dragon adhesive tape layer 3 is two layers, the thickness of the silver dragon adhesive tape layer 3 is 50mm, and the thickness of the high temperature resistant adhesive tape layer 5 is 30 mm.

Example 3

The basic structure of the fine grid screen structure for a screen production line in this embodiment is the same as that in embodiment 1, and the difference is that in this embodiment, the silver dragon adhesive tape layer 3 is three layers, the thickness of the silver dragon adhesive tape layer 3 is 60mm, and the thickness of the high temperature resistant adhesive tape layer 5 is 40 mm.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. The utility model provides a fine grid half tone structure for silk screen production line which characterized in that: the high-temperature-resistant screen printing device comprises a screen printing plate and a screen printing plate supporting surface (6) used for supporting the bottom of the screen printing plate, wherein a high-temperature-resistant tape layer (5) in a rectangular structure is arranged between the screen printing plate and the screen printing plate supporting surface (6), and the screen printing plate is located in the center of the surface of the high-temperature-resistant tape layer (5).

2. The fine-grid screen structure for the screen production line of claim 1, wherein: a silver dragon adhesive tape layer (3) in a rectangular structure is further arranged between the screen printing plate and the high-temperature-resistant adhesive tape layer (5), the screen printing plate is located at the surface center position of the silver dragon adhesive tape layer (3), and the screen printing plate is located at the surface center position of the high-temperature-resistant adhesive tape layer (5).

3. The fine-grid screen structure for screen production line of claim 2, wherein: the screen printing plate comprises a printing area (1), wherein the periphery of the printing area (1) is provided with a non-printing area (2), four corners of the non-printing area (2) are provided with silver dragon adhesive tape chamfers (4), and the silver dragon adhesive tape chamfers (4) connect the four corners of the non-printing area (2) with a silver dragon adhesive tape layer (3).

4. The fine-grid screen structure for screen production line of claim 3, wherein: silver dragon sticky tape chamfer (4) are the trapezium structure, the trapezoidal minor face of silver dragon sticky tape chamfer (4) links to each other with non-printing region (2), and the trapezoidal long limit of silver dragon sticky tape chamfer (4) links to each other with silver dragon sticky tape layer (3).

5. The fine screen structure for screen production line as claimed in any one of claims 2 to 4, wherein: the silver dragon adhesive tape layer (3) is more than one layer, and the thickness of the silver dragon adhesive tape layer (3) is 40mm-60 mm.

6. The fine-grid screen structure for the screen production line of claim 5, wherein: the thickness of the high temperature resistant adhesive tape layer (5) is 20mm-40 mm.