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Device for forming tin electrode wire on solar cell sheet

A solar cell and electrode wire technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as increased equipment investment costs, inability to weld quickly, and limit the feasibility of mass production of ultrasonic welding processes, and achieve equipment costs. Low, mass production stable effect

Inactive Publication Date: 2013-08-21
CHANGZHOU BITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the speed of heat supply, the welding speed cannot be very fast, which increases the equipment investment cost and limits the mass production feasibility of the ultrasonic welding process

Method used

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  • Device for forming tin electrode wire on solar cell sheet
  • Device for forming tin electrode wire on solar cell sheet
  • Device for forming tin electrode wire on solar cell sheet

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Embodiment Construction

[0025] The welding principle of the present invention is: using ultrasonic welding technology to provide ultrasonic energy to the welding head, the welding head is pre-heated and continuously heated, and the solder wire touches the welding head and melts instantaneously. When the welding head touches the substrate (silicon wafer), the melted tin is transferred to the substrate to form a firm bond under the action of ultrasonic waves. When the substrate (silicon wafer) or the welding head moves continuously, a tin line can be formed on the substrate (silicon wafer). The infrared heating technology of the present invention can quickly preheat the substrate (silicon chip), and can locally heat the welding area to the required temperature, while the ambient temperature remains unchanged.

[0026] According to above-mentioned principle, the present invention provides a kind of device that forms tin electrode line on solar battery sheet, as follows:

[0027] The device includes a v...

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Abstract

The invention relates to the technical field of manufacturing equipment of semiconductors or micro-electronics or solar cells, in particular to a device for forming a tin electrode wire on a solar cell sheet. The device for forming the tin electrode wire on the solar cell sheet comprises a vacuum box, a driving wheel is arranged on one end of the vacuum box, and a driven wheel is arranged on the other end of the vacuum box. The driving wheel is provided with a constant speed motor, a conveyer belt is hung between the driving wheel and the driven wheel, and the conveyer belt runs continuously through the driving wheel and the driven wheel to form a continuous circulating conveying device. A lifting starting valve is arranged above the box, the lifting starting valve is provided with one or more ultrasonic welding joints, and an infrared heating source is arranged in front of each ultrasonic welding joint to carry out pre-heating on a substrate. According to the device for forming the tin electrode wire on the solar cell sheet, tin or tin alloy is connected to the solar cell sheet through the ultrasonic welding joints to form a conductive electrode. A device can control multiple electrode wires simultaneously. An infrared technology is used for heating, the substrate can be warmed to a preset temperature fast, high-speed welding is achieved, the producing capacity of one device can achieve 1200 sheets / hour, and device cost is low.

Description

technical field [0001] The invention relates to the technical field of semiconductor, microelectronics or solar cell manufacturing equipment, in particular to a device for forming tin electrode lines on solar cells. Background technique [0002] The electrode wires on current solar cells are usually formed of silver or copper. The silver wire is formed by transferring the silver paste to the surface of the solar cell by screen printing, and then sintering. The disadvantage of silver wire is the high material cost. Copper wires are formed by electroplating, but in order to form line patterns, conductive seed line patterns must be pre-formed by other methods, such as photolithography, laser etching, etc., and the manufacturing process of this method is complicated. [0003] Using tin instead of silver as an electrode was proposed very early (literature: Mardesich et al.: "A low-cost Photovoltaic Cell Process Based on Thick Film Techniques"; 14th IEEE PV, Sp.Conf. Proce., 198...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/05B23K1/06
CPCY02E10/50
Inventor 上官泉元刘勇李巍
Owner CHANGZHOU BITAI TECH
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