Patent ID: 9249503
Filing Date: 2016-02-02
CPC Classification: C23C,Y10T

Claim Text:
1. A method for continuously subjecting an elongated substrate to vacuum film formation, comprising the steps of: a) unrolling and feeding an elongated substrate wound in a roll form from a first roll chamber in a first direction from the first roll chamber toward a second roll chamber, using a first surface as a surface for film formation; b) degassing the substrate fed in the first direction; c) forming, in a second film formation chamber, a second material film on the first surface of the degassed substrate; d) taking up, in the second roll chamber, the substrate in a roll form, the substrate having the second material film formed thereon; e) unrolling and feeding the substrate taken up in the second roll chamber from the second roll chamber in a second direction from the second roll chamber toward the first roll chamber; f) forming, in a first film formation chamber, a first material film on the second material film formed on the first surface of the substrate fed in the second direction; g) taking up, in the first roll chamber, the substrate in a roll form, the substrate having the first material film laminated on the second material film on the first surface thereof, wherein a second surface of the substrate, opposite the first surface, is free from material layers in the roll form; h) unrolling and feeding the substrate taken up in the first roll chamber from the first roll chamber in the first direction, using the second surface as a surface for film formation; i) degassing the substrate fed in the first direction; j) forming, in the second film formation chamber, the second material film on the second surface of the degassed substrate; k) taking up, in the second roll chamber, the substrate in a roll form, the substrate having the second material film formed thereon; l) unrolling and feeding the substrate taken up in the second roll chamber from the second roll chamber in the second direction; m) forming, in the first film formation chamber, the first material film on the second material film formed on the second surface of the substrate fed in the second direction; and n) taking up, in the first roll chamber, the substrate in a roll form, the substrate having the first material film laminated on the second material film on each of the first and second surfaces thereof.