Patent ID: 9243320
Filing Date: 2016-01-26
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; b) degassing the substrate fed in the first direction; c) forming, in a first film formation chamber, a first material film on the first surface of the degassed substrate, wherein a second surface of the substrate, opposite the first surface, is free of material layers in the second roll chamber; d) guiding the substrate having the first material film formed thereon to a second film formation chamber in a second direction from the second roll chamber toward the first roll chamber, and forming, in the second film formation chamber, a second material film on the second surface when the substrate is being guided in the second direction; e) taking up, in a third roll chamber provided between the first roll chamber and the second roll chamber, the substrate in a roll form, the substrate having the first material film formed on the first surface and the second material film formed on the second surface; f) unrolling and feeding the substrate taken up in the third roll chamber from the first roll chamber in the first direction; g) guiding the fed substrate to the first film formation chamber in the first direction, and forming, in the first film formation chamber, a third material film on the first or the second surface of the substrate when it is being guided in the first direction; h) guiding the substrate having the third material film formed thereon to the second film formation chamber in the second direction, and forming, in the second film formation chamber, a fourth material film on the second or the first surface of the substrate when it is being guided in the second direction; and i) taking up, in the third roll chamber, the substrate in a roll form, the substrate having the third or fourth material film laminated on the first material film on the first surface and the fourth or third material film laminated on the second material film on the second surface.