Process technologies developed for plastic-film substrate solar cells have been studied. The solar cells have a monolithic series-connected structure named ＇＇SCAF＇＇ and are fabricated by a developed fabrication process based on roll-to-roll systems. The fabricated cells are encapsulated using a newly developed roll-to-roll vacuum laminator. Pilot productions for SCAF cells are carried out and reproducibility of the process is confirmed. The details of the processes are presented and the advantages of them are discussed.