design rule
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Design rule 中的一段，有一些不是很明白请教大家一下
Rules in this apply to very wide power supply busses and ground busses.If a design involves a shrink (什么意思?不太明白……).This rules apply to the shrunk dimensions.
For stress relief rules（?）, there are reliability problems associated with very wide metal busses in large die, these problems manifest themselves in cracks propagating （?） from edges and corners of a die. These rules are intended to prevent surface stress points from which these cracks can emanate （?）.
谢谢了
Rules in this apply to very wide power supply busses and ground busses.If a design involves a shrink (什么意思?不太明白……).This rules apply to the shrunk dimensions.
For stress relief rules（?）, there are reliability problems associated with very wide metal busses in large die, these problems manifest themselves in cracks propagating （?） from edges and corners of a die. These rules are intended to prevent surface stress points from which these cracks can emanate （?）.
谢谢了
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第一段应该是说，如果按比例缩小的话，这个rule依然适用
第二段那个crack propagating也没看懂，应该是说宽金属总线在片上会在边缘和角上存在应力，要遵循design rule以避免宽金属的这种效应。
总言之应该是宽金属的一些rule吧
宽金属有应力会导致其在边缘部分破裂，所以要遵守一些规则（来避免类似事情）
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