摘要 |
PURPOSE:To omit a partition concerning the diameter direction of a memory area by providing a spacer to partition the area between two substrates at the bit pitch interval concerning the diameter direction and form the memory area. CONSTITUTION:The memory is composed of a translucent substrate 3, an oppo site substrate 7 provided in parallel to the substrate 3, a spacer 61 which is provided between both these substrates 3 and 7, partitions the area between both substrates at the bit pitch interval concerning a diameter direction and forms the memory area, a reflecting film on the opposite substrate 7 provided concerning the memory are partitioned by the spacer 61 and the liquid crystal charged to a memory area. When the position of light entering from the trans lucent substrate 3 side is not correctly matched with the memory area, the reflection of the light is not executed, and the error of the incident position is detected. Consequently, the spacer 61 not only holds a substrate interval but also has a function to partition the memory area. |