| 摘要 |
The present invention can perform, at the time of mounting flexible printed circuit boards on a display substrate, the accurate alignment without wrong mounting. A first alignment mark and a second alignment mark for performing the alignment of a flexible printed circuit board with a display substrate are attached to left and right sides of a group of lines which are formed on the flexible printed circuit board. Further, when at least one of the first alignment mark and the second alignment mark is equally divided into four areas, a shape of the alignment mark in at least one area is a shape obtained by folding back the shape of the alignment mark in other areas.
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