| 摘要 |
PURPOSE:To eliminate the etching difference of inner leads perpendicular to each other and make a patterning layout effective, by providing the inner leads at 45 deg. or 135 deg. inclining to the centerline of a tape substrate. CONSTITUTION:Inner leads 3' and 4' perpendicular to each other are provided at 45 deg. or 135 deg. inclining to the centerline 2 of a tape substrate 1' having an index perforation 6 on both sides. When a plurality of inner leads are formed along the tape substrate, pairs of inner leads are arranged on both sides of the centerline in zigzags. This equlizes the etching of inner leads. A plurality of pairs can be formed on a single substrate. |
