What are the process problems encountered during solar cell screen printing and their solutions?

Introduction What are the process problems encountered during solar cell screen printing and their solutions? 1. Warping: 1. The silicon wafer is too thin - check the thickness of the original silicon wafer 2. The printed aluminum paste is too thick

What are the process problems encountered during solar cell screen printing and their solutions?

1. Deformation:

1. The silicon wafer is too thin - check the thickness of the original silicon wafer

2 The printed aluminum paste is too thick - check the thickness of the silicon wafer. weight of aluminum paste

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3. The sintering temperature is too high - adjust the temperature in zones 4, 5, 6 and 7 of the sintering furnace

4. the effect in the cooling area of ​​the sintering furnace is not good - check the condition of the fan and the water inlet and outlet temperature and pressure, etc.

2 . Aluminum packaging:

1. . The sintering temperature is too high - adjust the temperature of zones 4, 5, 6 and 7 of the sintering furnace

2 . The printed aluminum paste is too thin - the weight of the printed aluminum paste increases. /p>

3. Dough is not stirred sufficiently before use - stirring time must reach specified time

4. Once the aluminum paste iprinted, drying time is not sufficient - increase drying. or increase the drying temperature

5. Sintering furnace exhaust air is too small - increase sintering furnace exhaust air

6. Cooling area of ​​sintering furnace Cooling effect is not good - check fan condition, inlet and outlet water temperature and pressure, etc.

3. False impression:

1. Print pressure is too low - increase print pressure

2. The spacing between the printing plates is too large - reduce the spacing between the plates

3 The printing wiper belt is uneven - replace the wiper belt

4. The workbench is uneven and seriously worn. ——Replace the workbench

5. The guide rails of the screen printing machine are uneven. Readjust the guide rails

4. :

1. Number of times the screen is used Too much, not enough tension - replacesz the screen

2 The screen parameters are not qualified - check the screen parameters of this batch and replace the screen

3. The mud is too thin. Mud mixing time is too long - strictly enforce mud mixing time regulations

4. Screen printing machine settings are inappropriate. adjust screen printing machine parameters

It is recommended to learn by practice on the Down production line.

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