| 摘要 |
A flexible circuit board has a magnetic head interface IC soldered on a tongue-shaped portion, which is folded such that the magnetic head interface IC is put inside. A front and a rear side of the magnetic head interface IC is covered with shield patterns. After exposure, the magnetic head interface IC drives the magnetic head to record some information of photography to a recording area in a photo film. When an film cartridge is loaded, the information in the recording area is read out for finding an unexposed frame. In recording and reading, the shield patterns absorb magnetic waves generated nearby the magnetic head interface IC, so that recording and reading signals are not interfered.
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