CN219338920U

CN219338920U - Screen printing squeegee and screen printing squeegee assembly

Info

Publication number: CN219338920U
Application number: CN202222992616.4U
Authority: CN
Inventors: 陈佳浩; 吴科俊; 刘忆军; 陈金元
Original assignee: Ideal Wanlihui Semiconductor Equipment Shanghai Co ltd
Current assignee: Ideal Wanlihui Semiconductor Equipment Shanghai Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-07-14
Anticipated expiration: 2032-11-10

Abstract

The utility model provides a screen printing squeegee and a screen printing squeegee assembly. The screen printing scraper comprises a plate body and a colloid part arranged at one side end of the plate body, wherein a groove matched with a main grid line of the solar cell is formed in the tail end of the colloid part, which is in contact with the screen plate, and the bottom surface of the groove is parallel to the screen plate when screen printing is performed. The utility model can improve the height of the main grid line and the electrical property of the solar cell.

Description

Screen printing squeegee and screen printing squeegee assembly

Technical Field

The utility model relates to the field of solar cell manufacturing, in particular to a screen printing scraper and a screen printing scraper component.

Background

A solar cell is a semiconductor device capable of converting solar energy into electric energy, which generates a photo-generated current using solar light and then outputs the electric energy through electrodes. Along with the continuous progress of solar technology, the production cost of solar cells is continuously reduced, the conversion efficiency is continuously improved, and the solar cells are becoming an important technical means for power supply. The surface of the solar cell needs positive and negative electrodes for outputting electric energy converted from solar energy, and the positive and negative electrodes are usually formed by screen printing.

Screen printing is an important process for forming a solar cell, has the characteristics of high preparation speed, good forming effect and high equipment automation degree, and is widely accepted by the market; the printing squeegee as a screen printing core has an important influence on the printing quality of the grid lines, particularly the aspect ratio of the grid lines.

The head of the printing scraper in the prior art basically adopts a cuboid adhesive tape, and when the scraper is used for printing, the scraper is in linear contact with the screen plate at a certain angle, so that when the scraper is used for printing slurry on a silicon wafer of a printing stock, the height of a main grid line is limited because the pressure born by the position of the main grid line of the screen plate is basically consistent with the pressure born by other positions of the screen plate, and when the height of the main grid line is higher, the main grid line can be directly pushed flat by the scraper.

Therefore, how to provide a screen printing squeegee and a screen printing squeegee assembly to improve the height of the main grid lines and the electrical performance of the solar cell has become a technical problem to be solved in the industry.

Disclosure of Invention

The utility model provides a screen printing scraper which comprises a plate body and a colloid part arranged at one side end of the plate body, wherein a groove matched with a main grid line of a solar cell is arranged at the end of the colloid part contacted with a screen plate, and the bottom surface of the groove is parallel to a screen plate when screen printing is performed.

In an embodiment, the height of the groove ranges from 10 micrometers to 20 micrometers, the width of the bottom surface of the groove ranges from 50 micrometers to 100 micrometers, the width of the main grid line ranges from 50 micrometers to 100 micrometers, and the height of the main grid line ranges from 10 micrometers to 20 micrometers.

In one embodiment, the angle between the plate body and the screen plate is in the range of 30-85 degrees when screen printing is performed.

In one embodiment, the included angle between the bottom surface of the groove and the plate body is 30-85 degrees when screen printing is performed.

In an embodiment, the plate body is a carbon fiber plate body or a glass fiber plate body, and the colloid part is a fluorinated rubber colloid part.

The utility model also provides a screen printing doctor assembly provided with a doctor blade holder having a screen printing doctor blade as claimed in any one of the preceding claims clamped at the bottom end thereof.

In an embodiment, the first positioning module is arranged on the plate body of the screen printing scraper, the second positioning module is arranged on the scraper rest, and when the first positioning module is aligned with the second positioning module, the screen printing scraper is in place on the scraper rest.

In an embodiment, the first positioning module is a first positioning screw hole, the second positioning module is a second positioning screw hole, and when the first positioning screw hole is aligned with the second positioning screw hole and is connected with the second positioning screw hole through a first bolt, the screen printing scraper is in place on the scraper frame.

In an embodiment, the first positioning module is a first positioning hole, the second positioning module is a second positioning hole, and the screen printing squeegee is in place on the squeegee frame when the first positioning hole is aligned with the second positioning hole.

In one embodiment, the scraper rest is provided with a receiving groove, and the tail end of the plate body is arranged in the receiving groove and can slide in the receiving groove until the scraper rest is in place.

Compared with the prior art that the part of the scraper colloid part contacted with the screen plate is a right-angle side without a groove, the screen printing scraper comprises a plate body part and a colloid part arranged at one side end of the plate body part, wherein the colloid part is provided with a groove matched with a main grid line of a solar cell at the end contacted with the screen plate, and the bottom surface of the groove is parallel to the screen plate when screen printing is carried out.

The utility model can improve the height of the main grid line and the electrical property of the solar cell.

Drawings

The above features and advantages of the present utility model will be better understood after reading the detailed description of embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily to scale and components having similar related features or characteristics may have the same or similar reference numerals.

Fig. 1 is a schematic diagram showing the front view of the constitution of an embodiment of the screen printing squeegee of the utility model.

Fig. 2 is a schematic side view of a constitution of an embodiment of the screen printing squeegee of the utility model.

Fig. 3 is a schematic view of a cutting direction for forming the groove 120 shown in fig. 2.

Fig. 4 is a schematic diagram showing the front view of the constitution of an embodiment of the screen printing blade assembly of the utility model.

Fig. 5 is a schematic view of an assembled out-of-place configuration of an embodiment of a screen printing doctor assembly of the utility model.

Fig. 6 is a schematic view of an assembled in-place configuration of an embodiment of a screen printing doctor assembly of the utility model.

Detailed description of the preferred embodiments

The utility model will be described in detail below with reference to the drawings and the specific embodiments so that the objects, features and advantages of the utility model will be more clearly understood. It should be understood that the aspects described below in conjunction with the drawings and detailed embodiments are merely exemplary and should not be construed as limiting the scope of the utility model in any way. The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements.

Fig. 1 and 2 are schematic diagrams showing a front view and a side view of a constitution of a screen printing squeegee embodiment of the utility model, respectively. As shown in fig. 1 and 2, the screen printing squeegee 1 includes a plate body 10 and a colloid portion 12, and the colloid portion 12 is provided at one side end of the plate body 10. The plate body 10 may be a carbon fiber plate body, a glass fiber plate body, or the like, and the colloid portion 12 may be a fluorinated rubber colloid portion, or the like.

The gel portion 12 is provided with grooves 120 conforming to the main grid lines (not shown) at the end contacting the screen plate 3 (see fig. 4), and the bottom surfaces of the grooves 120 are parallel to the screen plate when screen printing is performed.

Fig. 3 is a schematic view of a cutting direction for forming the groove 120 shown in fig. 2. As shown in fig. 3, the recess 120 may be formed by cutting the gel portion 12 along an angle beta with the bottom surface of the gel portion 12, the angle beta being in the range of 30-85 degrees. The height of the groove 120 ranges from 10 micrometers to 20 micrometers, the width of the bottom surface of the groove 120 ranges from 50 micrometers to 100 micrometers, the width of the main grid line ranges from 50 micrometers to 100 micrometers, and the height of the main grid line ranges from 10 micrometers to 20 micrometers. The angle θ between the plate body 10 and the screen 3 (see fig. 4) is in the range of 30 to 85 degrees (see fig. 4) when screen printing is performed. The angle θ and the angle β may be complementary angles, for example, the angle θ is 60 degrees and the angle β is 30 degrees.

The bottom surface of the groove 120 is parallel to the screen plate 3 during screen printing, and the range of the included angle (the complementary angle of beta) between the bottom surface of the groove 120 and the plate body 10 is 30-85 degrees.

Fig. 4 is a schematic diagram showing the front view of the constitution of an embodiment of the screen printing blade assembly of the utility model. As shown in fig. 4, the screen printing squeegee assembly is provided with a squeegee frame 2, and the bottom end of the squeegee frame 2 is sandwiched by the screen printing squeegee 1 shown in fig. 1. For simplicity of illustration and description, other components that are supported by the doctor frame 2 and drive the doctor frame up and down and print back and forth on the screen are not shown in fig. 4, and are known to those skilled in the art and will not be described in detail herein.

As shown in fig. 2, the plate body 10 of the screen printing squeegee 1 is provided with a first positioning module 100. Fig. 5 and 6 are schematic views of an assembled out-of-position and in-position configuration, respectively, of an embodiment of a screen printing doctor assembly of the utility model. As shown in fig. 4, the doctor blade holder 2 is provided with a receiving groove 202 which mates with the plate body 10 of the screen printing squeegee 1, and the tip of the plate body 10 is provided in the receiving groove 202 and is slidable therein until it is in place. As shown in fig. 5 and 6, a second positioning module 200 is provided on the doctor blade holder 2, and when the first positioning module 100 is aligned with the second positioning module 200, the screen printing squeegee 1 is in place on the doctor blade holder 2, that is, in place in the accommodating groove 202.

The first positioning module 100 may be a first positioning screw hole, and the second positioning module 200 may be a second positioning screw hole, where the screen printing squeegee 1 is in place on the doctor blade holder 2 when the first positioning screw hole is aligned with the second positioning screw hole and connected by a first bolt. The screen printing squeegee 1 and the squeegee holder 2 can be clamped by a clamping module which is usual in the industry, in addition to the first screw connection.

The first positioning module 100 may be a first positioning hole, and the second positioning module 200 may be a second positioning hole, and when the first positioning hole is aligned with the second positioning hole, the screen printing squeegee 1 is in place on the squeegee frame 2.

The screen printing scraper comprises a plate body and a colloid part arranged at one end of the plate body, wherein a groove matched with a main grid line of a solar cell is formed in the end, contacted with a screen plate, of the colloid part, and the bottom surface of the groove is parallel to the screen plate when screen printing is performed.

The embodiments described above are intended to provide those skilled in the art with a full range of modifications and variations to the embodiments described above without departing from the inventive concept thereof, and therefore the scope of the utility model is not limited by the embodiments described above, but is to be accorded the broadest scope consistent with the innovative features recited in the claims.

Claims

1. The screen printing scraper comprises a plate body and a colloid part arranged at one side end of the plate body, and is characterized in that a groove matched with a main grid line of a solar cell is formed in the tail end of the colloid part, which is in contact with a screen plate, and the bottom surface of the groove is parallel to the screen plate when screen printing is performed.

2. The screen printing squeegee of claim 1 wherein the grooves have a height in the range of 10 microns to 20 microns, a width in the range of 50 microns to 100 microns at the bottom of the grooves, a width in the range of 50 microns to 100 microns at the main grid lines, and a height in the range of 10 microns to 20 microns at the main grid lines.

3. The screen printing squeegee according to claim 1, wherein the angle between the plate body and the screen plate when screen printing is performed is in the range of 30 to 85 degrees.

4. A screen printing squeegee according to claim 1 or 3 wherein the angle between the bottom surface of the recess and the plate body portion when screen printing is performed is in the range of 30-85 degrees, respectively.

5. The screen printing squeegee of claim 4 wherein the plate body is a carbon fiber plate body or a glass fiber material plate body and the gel portion is a fluorinated rubber gel portion.

6. A screen printing doctor assembly provided with a doctor blade holder having a screen printing doctor blade according to any one of claims 1 to 5 clamped at its bottom end.

7. The screen printing squeegee assembly of claim 6, wherein the plate body of the screen printing squeegee is provided with a first positioning module and the squeegee blade holder is provided with a second positioning module, the screen printing squeegee being in place on the squeegee blade holder when the first positioning module is aligned with the second positioning module.

8. The screen printing doctor assembly of claim 7, wherein the first positioning module is a first positioning screw and the second positioning module is a second positioning screw, the screen printing doctor being in place on the doctor blade holder when the first positioning screw is aligned with the second positioning screw and connected by a first bolt.

9. The screen printing squeegee assembly of claim 7, wherein the first positioning module is a first positioning aperture and the second positioning module is a second positioning aperture, the screen printing squeegee being in place on the squeegee frame when the first positioning aperture is aligned with the second positioning aperture.

10. The screen printing doctor assembly of claim 6, wherein the doctor blade holder defines a receiving slot, and the end of the plate body is disposed in the receiving slot and is slidable therein until in place.