| 摘要 |
PURPOSE:To realize uniformed reading accuracy by providing a pattern in a way that a part in bits is divided into two by an electrode forming material to form a low resistance part in the bit in the stage of electrode formation thereby decreasing the probability of mis-reading of a minute wire. CONSTITUTION:An intermediate electrode pattern of a low resistance equivalent to an aggregation is provided intensionally in the bit. The intermediate electrode, i.e., a minute wire pattern 15 is formed actually with the same material as that forming both electrodes at the selection side of a group side and divides a part in the bit into two. Then the distance between the electrodes is set equal to or slightly smaller than the sub-scanning line width. Fig. (a) shows the state without any aggregation, Figs. b, c, d indicate the state where the aggregation 14 exists. Since the minute wire pattern 15 is provided in the bit shown in Fig. (a), a high resistance ratio is avoided. Since each bit shown Figs. c, d includes all the aggregation, the part does not contribute to the photoelectric conversion but rather to the low resistance ratio and the suppression of variance in the resistance value distribution. |
