They indicate position of I/O pins for automatic routers. Layers with pin purpose are not part of the mask layout. ' metal1 dg' is metal1 layer with drawing purpose. For example metal1 appears twice: once as metal1 dg, the again as metal1 pn. You might notice that some layer names appear more than once. Try playing with these features after you have drawn some rectangles in the next section. Right-clicking a layer in the LSW toggles select on and off Turns off selection of layers (darkens layer in LSW window) Pin layers and instance (subcells) selection controlled by Inst and Pin at top of window Middle-clicking a layer in the LSW toggles view on and off Select other layers in LSW to make them visible as well Make all layers except the one currently selected in the LSW invisible Use redraw or CTRL-r for this to take affect These buttons speficy which layers in the layout window can be viewed or selected. The layers with the highlighted boxes next to them will appear in your LSW window.Īnother useful feature of the LSW are the AV NV AS NS buttons. To select which layers you want to view, go to Edit -> Set Valid Layers. Not all of the layers are currently visible. LSW LSW displays the layers defined in the technology. The second one is Virtuoso Editing window. from either the library manager or CIW windows.Įnter the name of your local library as Library Name enter ' inv' as Cell Name, ' layout' as View Name select ' Virtuoso'Ĭell ' inv' with ' layout' view will be opened in your library for you to edit. To create a cell named ' inv' in your new library,įirst select File -> New -> Cellview. For your first layout we will give you the coordinates of the design, but for future standard cells it might be helpful to build a the routing grid using text rectangles to guide the layout process. If you have not already, please familiarize yourself with the routing grid here. Important to remember that vias must be at the intersections of the routing grid. To use these standard cells with the automatic place and route, it is We are now going to build the mask layout view of our cmos inverter. Using the Layout Editor Previous Tutorial Main Menu Next Tutorial

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