Fig. 2. Flow chart of production process. niques. Welding equipment with a model MCW-550 constant voltage power supply (Hughes Aircraft Company) was used. The schematic diagram of welding method is shown in Fig. 1. The major problems of welding for the ultrathin cells are cell fractures apt to be caused by excess welding conditions and delaminations of coverglass adhesive caused by local high temperatures (1). To overcome these problems, the suitable welding parameters (electrode pres-
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