一,前言以超大规模集成电路为代表的微电子技术的迅速发展,已是众所周知的事情。这种技术的进步,也可以说成是精密加工技术的进步。使用这种加工技术,可以将容量为256K字节的半导体储存器做在一个芯片上,其最小尺寸可达1.5um到2μm。如果将这个尺寸与神经细胞的大小作比较的话,它仅相当于细胞的十分之一。在不久的将来,完全有可能将其尺寸 I. INTRODUCTION The rapid development of microelectronics represented by very large-scale integrated circuits is a well-known thing. The progress of this technology, can also be said to be the progress of precision machining technology. Using this processing technology, 256K bytes of semiconductor memory can be made on a single chip with a minimum size of 1.5um to 2μm. If you compare this size to the size of a nerve cell, it is only one tenth of that of a cell. In the near future, it is entirely possible to size it