A stringer for semiconductor cell processing

Abstract

The invention relates to the technical field of semiconductor processing equipment, and discloses a stringer for processing semiconductor cells, comprising a stringer body and a conveyor belt for transporting materials. The stringer body is connected with a nozzle through a manipulator. The air pressure is used to control the open state of the cut-off airbag and the blocked airbag. Its expansion and contraction will not be affected by external solutions. After a long time of use, its resistance will basically not change, and the response time of its opening and closing is relatively constant. , it is convenient to maintain the identity of opening or closing of multiple nozzles. On the other hand, when the sealing air bag moves upward, it will scrape off the residual flux on the inner wall, avoid exposure to air, and form crystals under the influence of high temperature to ensure the inner wall of the nozzle cavity. Clean, secondly, when the nozzle is closed, because the cut-off air bag cuts off the flux injection pressure at the upper end, and at the same time forms a negative pressure under the pressure plate, the pressure on the air bag is less and it is easier to seal.

Description

technical field [0001] The invention relates to the technical field of semiconductor processing equipment, in particular to a stringer for processing semiconductor cells. Background technique [0002] The stringing process is one of the core processes of solar cell processing, which directly affects the service life and power generation efficiency of the cell. In order to ensure the welding effect during stringing, it is necessary to spray flux, and the spraying action of flux generally adopts high-frequency electromagnetic Valve control, the spraying effect is completely controlled by the high-frequency solenoid valve. [0003] During the spraying process, multiple nozzles spray the welding ribbon at the same time. After the solenoid valves have been used for a long time, their internal resistance and sensitivity are different, so it is difficult to ensure that they are opened synchronously. Secondly, due to the phenomenon of dripping, there may be Cavity, it is difficult ...

AI Technical Summary

Problems solved by technology

[0003] During the spraying process, multiple nozzles spray the welding ribbon at the same time. After the solenoid valves have been used for a long time, their internal resistance and sensitivity are different, so it is difficult to ensure that they are opened synchronously. Secondly, due to the phenomenon of dripping, there may be Cavities, it is difficult to ensure that the flux flows out synchronously at the moment of start-up, therefore, it is difficult to ensure that the position of each spraying start point remains uniform, which reduces the coating accuracy

[0004] After the solenoid valve is closed, there will still be some flux remaining in the end tube of the nozzle. The flux is exposed to the air and exposed to high temperature, so it is easy to crystallize and block the end tube. On the one hand, it may make the spraying pressure unstable, the sprayed flux will not gather, pollute the non-spraying area, and reduce the quality of the cell

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