1. 提取标准单元的lef,进行到Extract提取antenna这一步时,没有勾选‘‘Extract signal nets’’和’’Extract signal nets’’这两个选项,而是勾选了‘‘use different layer assignment for antenna calculation only'',里面我添加了栅极的定义:PO PO
有源区的定义:OD OD andnot PO
接触孔的定义:CO CO
但是这样提取天线效应会报警告:
A short has been deteced between nets A2 and A1 during antenna calculation .This indicates a problem in the design unless the nets are conected by a polysilicon resistor.The short is ignored for antenna calculation but is considered for the signal net extraction because either the "Use different layer assignments for antenna calculations only" option is selected or the extraction depth has been limited.
我想请教一下,是我哪里设置错了
A2 和A1是单元的输入端口的名称
2. 还有一个问题:在Extract这步,General设置时,我设置的是
(PO M1 CO)(OD M1 CO)
但也会报警告:Layer('OD') could not be included in the antenna calculation because their fabrication mask number are not specified in the technology database.To include these layers in the intenna calculation,update the technology database and reload the library.