| 摘要 |
<p>Provided is a solar cell lead wire with a long life span, and a method of manufacturing thereof, wherein cracks will not be generated even after a long period of heat cycles. The solar cell lead wire is characterized in comprising oxygen free copper or tough pitch copper, having grain size at the surface layer thereof to be not less than 10 µm and less than 60 µm, and having the grain size at the surface layer thereof to be less than 80% the grain size at the inner layer thereof. The method of manufacturing the solar cell lead wire is characterized in executing cold rolling to an ingot of oxygen free copper or tough pitch copper, then executing intermediate annealing or hot rolling to the resulting product at 300-700°C for 1 second to 1 hour, then processing the resulting product into a lead wire by executing cold rolling or cold drawing rolling with a processing rate of 1-15% per pass, and then executing annealing to the lead wire at 200-500°C for 1 second to 1 hour.</p> |
