An opening is formed at the second metal layer above the etch stop layer to expose the etch stopping layer.
在蚀刻停止层上方的第二金属层形成一开口，使蚀刻停止层暴露出来。
The invention discloses an etching stopping layer comprising a nitrogenous silicon carbide layer formed on a substrate and a silicon nitride layer formed on the silicon carbide layer.
本发明公开了一种刻蚀停止层，包括在衬底上形成的含氮的碳化硅 层，以及位于所述碳化硅层之上的氮化硅层。
More intense monitoring will be required to determine potential stopping points should breakthrough occur providing an added layer of vigilance when using these drugs.
出现病毒学突破意味着已产生耐药应立即停药以避免进一步加深耐药。
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