Patent ID: 9006561
Filing Date: 2015-04-14
Classification: B32B,H01L,Y02E

Abstract:
1. A collector sheet for solar cells comprising wiring formed by laminating metal foil on a surface of a sheet resin base material and then patterning the metal foil into a desired wiring shape, wherein the resin base material is a biaxially stretched sheet having a thickness of 12 μm to 250 μm made by being stretched in a TD direction, which is the width direction in the case of processing, and a MD direction, which is the length direction in the case of processing with a biaxial stretching apparatus, wherein, the wiring formed on the collector sheet for solar cells has each of its portions formed along either of the directions of the first and second directions components orthogonal to each other, and the total length of the portions formed along the first directional components of the wiring is made longer than the total length of the portions formed along the second directional components of the wiring to impart anisotropy to the wiring, an orientation of the first directional components agrees with an orientation of the MD direction of the stretched resin base material; and the MD direction heat shrinkage factor of the resin base material heated at 150° C. for 30 minutes is 0.2% to 1.0%.