一个非晶硅薄膜太阳能电池制备用激光刻线系统

Laser scribing system for a-Si thin film solar cell preparation

非晶硅薄膜太阳能电池制备过程中的激光刻线工艺要求刻线宽度在30μm～50μm之间,死区范围小于300μm,刻线深度符合工艺要求。这不仅要求激光器具有较高的光束质量,而且要求光学系统具有较高的成像质量和较宽的焦深。设计了单激光器四分光路的激光刻线系统。采用设计的激光刻线装置,在1 400mm×1 100mm×3.2mm玻璃基板上进行刻线试验,分别得到刻线P1,P2,P3的线宽为35μm,50μm和45μm,死区范围(P1至P3的距离)为287μm,最终深度分别为0.98μm,0.24μm和0.58μm,刻线宽度和深度均符合薄膜太阳能电池制备工艺要求。

The laser scribing process for a-Si（amorphous silicon） thin film solar cell preparation requires the line width of 30 μm～50 μm,the dead zone of less than 300 μm in size,and the compliance of line depth with the process requirements.Thus,the high beam quality of the laser is required,as well as the high imaging quality and wide focal depth of the optical system.A laser scribing system with a single laser and four-way light splitters was designed.With the designed laser scriber,a laser scribing test was done on a 1 400 mm×1 100 mm×3.2 mm glass substrate.The widths of the scribing lines P1,P2 and P3 were 35 μm,50 μm and 45 μm,respectively,the dead zone（distance between P1 and P3） was 287 μm,and their final depths were 0.98 μm,0.24 μm and 0.58 μm respectively.The results show that the widths and depths of the scribing lines meet the requirements of thin film solar cell preparation process.