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Device and method for manufacturing silicon solar cell electrode printing screen through laser

A silicon solar cell and printing screen technology, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems affecting the free electron passage efficiency of solar cells, reducing the conversion efficiency of solar cells, and affecting the conversion efficiency of solar cells. Achieve the effects of reduced coverage area, thin grid line width and good wear resistance

Active Publication Date: 2012-10-10
JIANGYIN DELI LASER EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the electrode paste on the front and back of the screen printing directly affects the conversion efficiency of the solar cell. The currently commonly used screen printing screen is made of polyester wire or stainless steel wire cross-woven and tightly stretched on a metal frame. This screen, The width and height of the printed grid lines are not uniform, which affects the free electron passage efficiency generated by the solar cell, thereby reducing the conversion efficiency of the solar cell; in addition, the service life of this kind of screen is short, which affects the processing cost

Method used

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  • Device and method for manufacturing silicon solar cell electrode printing screen through laser
  • Device and method for manufacturing silicon solar cell electrode printing screen through laser
  • Device and method for manufacturing silicon solar cell electrode printing screen through laser

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Embodiment Construction

[0028] see Figure 1~3 , the present invention relates to a device and method for making a silicon solar cell electrode printing screen by laser, the device includes a laser 1 (specifically, the laser 1 is a pulse laser with a repetition frequency of 10KHz and above, and the emitted The wavelength of the laser is 196nm~1064nm, and the pulse width action time is 1fs~1ms), the high-frequency pulsed laser emitted by the laser 1 passes through the shutter 2 and the beam expander 3, and then enters the surface of the laser reflector 4. After the reflection of the mirror 4, it is incident on the surface of another laser mirror 4 through the half-wave plate 5, the Glan prism 6 and the rotating module 7 (TREPANNING HEAD), and enters the vibrating mirror after being reflected by the laser mirror 4 System 8, the laser beam emitted from the galvanometer system 8 is focused by the focusing mirror 9 and is facing the workpiece 16 to be processed on the platform 13. A CCD alignment observat...

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Abstract

The invention relates to a device and a method for manufacturing a silicon solar cell electrode printing screen through a laser. The device comprises a laser device (1), wherein the laser emitted by the laser device (1) passes through an optical shutter (2) and a beam expander (3) so as to be incident on the surface of a laser mirror (4); is reflected by the laser mirror (4); sequentially passes through a half-wave plate (5), a Glan prism (6) and a rotary module (7) so as to be incident on the surface of another laser mirror (4); is reflected by the laser mirror (4); and enters into a galvanometer system (8). The laser emitted from the galvanometer system (8) is focused through a focus lens (9) so as to be over against a workpiece to be machined (16) on a platform (13). According to the device and the method for manufacturing the silicon solar cell electrode printing screen through the laser, the service life of the solar cell printing screen can be effectively improved, and the printing quality of a solar cell electrode is improved.

Description

technical field [0001] The invention relates to a device for manufacturing solar cell electrode printing screen plates by laser, and the manufacturing method, which belong to the field of photovoltaic technology. Background technique [0002] At present, with the continuous development of silicon solar cell technology, the industry puts forward higher requirements on the conversion efficiency of silicon solar cells and the production cost of silicon solar cells. [0003] The production of general silicon solar cells mainly includes the following steps, 1. Removal of the damaged layer; 2. Surface texturization; 3. Diffusion of the emission area; 4. Edge junction etching; 5. PECDV deposition of SiN; 6. Screen printing Front and back electrode paste; 7. Co-firing to form metal contacts; 8. Cell testing. Among them, the electrode paste on the front and back of the screen printing directly affects the conversion efficiency of the solar cell. At present, the commonly used screen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/38B23K26/14B23K26/06B23K26/42B23K26/064B23K26/70
Inventor 赵裕兴狄建科蔡仲云闫华
Owner JIANGYIN DELI LASER EQUIP
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