In the layout design window click the left mouse button for the first point of the polygon.From the Virtuoso Editing window pull down menu, select Create -> Polygon P or use the P bind key.If you have finished drawing rectangles, hit on the keyīoard to exit the " Create Rectangle" command.Īnother useful shape is the polygon. To select your layer in LSW to change the drawing layer thenĬlick left mouse button for the two corners in Virtuoso Editing
If you want to draw rectangles of another layer, click left mouse button If you want to draw another rectangle using current drawing layer, simplyĬlick left mouse button for the two corners of the rectangle. Do you know the bind key for undo? The key If this is not the desired rectangle, select Edit -> Undo uįrom menu to undo the action. Mouse button for the first corner of the rectangle, then click left mouseīutton again for the second corner. In the layout design window ( Virtuoso Editing) click left You will see the selected layer surrounded by wider border (the selectedįrom Virtuoso Editing window pull down menu, selectĬomment: Create Rectangle has bind key " r", and it is listed To draw rectanglesįrom LSW select a layer by clicking left mouse button on The most common shape in a layout is rectangle. In determining whether or not you are following the spacing rules. left click on two points to draw a ruler on the design (measures in microns). Use the bind key k to bring up the ruler command. Be careful with the last option, a single right click To zoom out, type shift-z, to zoom in type control-z or clickĪnd drag with your right mouse button to zoom to the area under the rectangleĬreated by dragging. Window -> Zoom has a few options for zooming, but you may find the 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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