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第五百八十七章 摩尔定理(计算机)(1 / 2)

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仙童半导体公司戈登?E?摩尔认为,随着社会的发展,芯片的容量在集成电路上可以容纳的晶体管数目在大约每经过18个月便会增加一倍。换言之,处理器的性能每隔两年翻一倍。

因为摩尔知道,社会在发展,人类对集成电路的需求在增加,同时集成电路的设计也越来越精细,所以增加是必然的。

但是,紧接着会有人问,这种增加会有个头吧。

摩尔认为,当然不会。

但有人还会紧追不舍的问,如果是集成电路小到一定程度,那容量就不会再增加了吧?

摩尔认为,社会只要还在发展,这种事情就不会有头,即使芯片最基本的单元太小,也会以一种其他形式继续储存,原子级别的单位不行的话,会用原子核的技术来储存。

摩尔定律的出现,是一个激励,明白电子行业必须要更新换代,不会轻易停止。如果不更新换代,就容易被淘汰,这是社会经济学的趋势。

但有人认为,

制造出的单个晶体管中,只有一小部分,只有百分之十至二十—能够真正发挥作用。将这样的六七个器件一起放在集成电路中,你一定会认为这些小问题会叠加,导致只有极少数的芯片能够正常使用。

摩尔认为,这一逻辑却是错误的。事实上,在制造含有8个晶体管的芯片时,能够正常使用的芯片比例与制作8个单个晶体管时的可使用比例是相近的。原因在于这种概率并不是针对单个晶体管而言的。缺陷会占用空间,而多种类型的缺陷会像飞溅的油漆一样随机分布。如果将两个晶体管紧密地放置在一起,单个晶体管自身的缺陷便可以同时影响两个晶体管。因此,将两个晶体管并排放在一起时由缺陷导致的失效风险与单独一个晶体管是相同的。

摩尔确信,最终一定能够证明集成工艺是经济合算的。

在1965年发表的论文中,为了证明集成电路拥有无限光明的未来,摩尔在一幅曲线图中按照先后顺序绘制了5个时间点。第一个时间点是仙童半导体公司首款平面晶体管问世,随后是公司的一系列集成电路产品推出的时间。摩尔采用的是半对数曲线图,其中一个轴是分度不均匀的对数坐标轴,另一个轴是分度均匀的普通坐标轴。指数函数在这种坐标图中会被显示为直线。而摩尔所画的,连接这5个时间点的线大约是一条倾斜的直线,其倾斜度恰好对应集成电路上每年翻倍的元件数量。

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