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CN-121973542-A - Screen printing plate manufacturing method for photovoltaic panel

CN121973542ACN 121973542 ACN121973542 ACN 121973542ACN-121973542-A

Abstract

The invention relates to a screen printing plate manufacturing method for a photovoltaic plate, which comprises the steps of pressing a polyimide film onto a metal mesh cloth through a hot pressing process to obtain an intermediate screen printing plate; heating the middle screen printing plate, and carrying out graph manufacture on the heated screen printing plate to obtain the target screen printing plate. After the hot pressing process, the structure of the middle screen plate is a composite structure of a metal screen cloth, a glue layer and a PI film, the thickness of the glue layer is generally 4-5 mu m, the heating temperature is controlled to be 100-400 ℃, the heating time is controlled to be 20-40 minutes, and low-boiling-point volatile components, micromolecule silane, residual solvents, moisture or unreacted micromolecule monomers in the adhesive are removed, so that the cooled glue layer is stable in structure, the conditions of glue opening and warping are avoided, and the product yield is improved.

Inventors

  • Cao shuangfu
  • HUANG XIAOBING

Assignees

  • 昆山恒盛电子有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. A method of making a screen for a photovoltaic panel, comprising: pressing the polyimide film onto the metal mesh cloth through a hot pressing process to obtain an intermediate screen; Heating the middle screen; And carrying out graph manufacture on the heated screen printing plate to obtain the target screen printing plate.
  2. 2. The screen printing method for a photovoltaic panel according to claim 1, wherein in the step of heating the intermediate screen, it comprises: and placing the intermediate screen on a heating table, wherein the heating temperature of the heating table is set to be 100-400 ℃ and the heating time is set to be 20-40 minutes.
  3. 3. The screen printing method for a photovoltaic panel according to claim 2, further comprising: And placing the middle screen plate on a heating plate of the heating table, wherein the distance range between any outer frame of the heating plate and the adjacent inner frame of the middle screen plate is 3-5 mm.
  4. 4. A screen printing method for a photovoltaic panel according to claim 3, wherein the heating plate is an iron plate having a thickness of 1 cm.
  5. 5. The screen printing method for a photovoltaic panel according to claim 2, wherein in the step of heating the intermediate screen, further comprising: If the middle screen printing plate is used for printing the front surface of the photovoltaic panel, setting the heating temperature of the heating table to be 260-300 ℃ and the heating time to be 30 minutes; if the intermediate screen printing plate is used for printing on the back of the photovoltaic panel, the heating temperature of the heating table is set to be 220-260 ℃ and the heating time is set to be 30 minutes.
  6. 6. The screen printing method for a photovoltaic panel according to claim 2, wherein in the step of heating the intermediate screen, further comprising: If the thickness of the polyimide film is 2-5 mu m, setting the heating temperature of the heating table to be 260-300 ℃ and the heating time to be 30 minutes; and if the thickness of the polyimide film is 5-15 mu m, setting the heating temperature of the heating table to be 220-260 ℃ and the heating time to be 30 minutes.
  7. 7. The screen printing method for a photovoltaic panel according to claim 2, wherein in the step of placing the intermediate screen on the heating plate of the heating table, comprising: And the middle screen plate is fixedly arranged above the heating plate in a grating positioning mode.
  8. 8. The screen printing method for a photovoltaic panel according to claim 1, further comprising, after heating the intermediate screen: The intermediate screen was allowed to cool to room temperature.
  9. 9. The method for manufacturing a screen for a photovoltaic panel according to claim 7, further comprising: And placing the intermediate screen plate in a cooling chamber, and controlling the ambient temperature to uniformly decrease at a preset rate.
  10. 10. The screen printing method for a photovoltaic panel according to claim 1, further comprising, after heating the intermediate screen: And cutting off the polyimide film exceeding the inner frame part of the middle screen plate.

Description

Screen printing plate manufacturing method for photovoltaic panel Technical Field The invention relates to the technical field of manufacturing of photovoltaic panels, in particular to a screen printing plate manufacturing method for a photovoltaic panel. Background The photovoltaic industry is undergoing a depth-of-field adjustment, and the core characteristics of the photovoltaic panel are that the scale expansion is changed to high-quality development, and the photovoltaic panel is one of the foundations of the photovoltaic industry, so that families, communities and enterprises can become power producers, the traditional centralized energy supply mode is overturned, the energy source of the common people is endowed with the initiative, and the distributed and flattened revolution of an energy system is promoted. The photovoltaic screen printing is a key link for producing the crystalline silicon solar cell, and is mainly responsible for printing conductive paste (such as silver paste and aluminum paste) on a silicon wafer to form an electrode, so that the power generation efficiency and the cost of the cell are directly affected. Traditional screen printing faces the bottlenecks of screen life, precision stability and the like. For example, after hot pressing, the structure of the adhesive layer between the Polyimide (PI) film and the metal mesh becomes unstable, for example, the adhesive of the adhesive layer fails to be melted, flowed or solidified to some extent due to the influence of temperature in the hot pressing process, which results in pseudo-adhesion, but the initial strength is still good, but the cohesive force is poor, the adhesive layer is easy to fail over time or is influenced by the stress, the adhesive layer is too thick, a compact and uniform adhesive film cannot be formed, insufficient contact with a substrate occurs, bubbles and gaps are generated, or huge internal stress is generated due to the influence of the temperature rising and falling rate, particularly for the adhesive or thermoplastic materials with higher glass transition temperature (Tg), the stress is released when the subsequent environment changes, the adhesive is opened and warped, and finally the product yield is not high. Therefore, how to further improve the yield of the photovoltaic panel printed product is a problem to be solved at present. Disclosure of Invention In view of the above, the embodiment of the invention provides a screen printing method for a photovoltaic panel, so as to solve the problem of insufficient yield of a photovoltaic panel printing product in the prior art. The embodiment of the invention provides a screen printing plate manufacturing method for a photovoltaic plate, which comprises the following steps: pressing the polyimide film onto the metal mesh cloth through a hot pressing process to obtain an intermediate screen; Heating the middle screen; and (3) carrying out graph manufacture on the heated screen printing plate to obtain the target screen printing plate. Optionally, in the step of heating the intermediate screen, it includes: and placing the intermediate screen on a heating table, wherein the heating temperature of the heating table is set to be 100-400 ℃ and the heating time is set to be 20-40 minutes. Optionally, the method further comprises: And placing the middle screen plate on a heating plate of a heating table, wherein the distance between any outer frame of the heating plate and the inner frame of the corresponding middle screen plate is 3-5 mm. Alternatively, the heating plate is an iron plate having a thickness of 1 cm. Optionally, in the step of heating the intermediate screen, further comprising: If the middle screen printing plate is used for printing the front surface of the photovoltaic panel, setting the heating temperature of a heating table to be 260-300 ℃ and the heating time to be 30 minutes; if the middle screen printing plate is used for printing on the back of the photovoltaic panel, the heating temperature of the heating table is set to be 220-260 ℃ and the heating time is set to be 30 minutes. Optionally, in the step of heating the intermediate screen, further comprising: If the thickness of the polyimide film is 2-5 mu m, setting the heating temperature of a heating table to be 260-300 ℃ and the heating time to be 30 minutes; If the thickness of the polyimide film is 5-15 mu m, setting the heating temperature of the heating table to be 220-260 ℃ and the heating time to be 30 minutes. Optionally, in the step of placing the intermediate screen on a heating plate of the heating table, it includes: The middle screen plate is fixedly arranged above the heating plate in a grating positioning mode. Optionally, after heating the intermediate screen, further comprising: The intermediate screen was allowed to cool to room temperature. Optionally, the method further comprises: And placing the intermediate screen plate in a cooling chamber, and controlling the amb