(One trick is that if LVS is not matching then you can compare these two files to get to know what is happening and also comp.out in root directory will be of great help)įor doing LVS check we use a tool named 'netgen' and I used netgen 1.5 for my work. Note that all submitted CIF and GDS files have already been scaled before submission. A library of these structures is contained in a file that consists of a library header, a sequence of structures, and a library tail. These cells, called structures in GDS II parlance, have alphanumeric names up to 32 characters long. refers to the file size (in Mega Bytes) of the generated design layout in GDSII format. A GDS II circuit description is a collection of cells that may contain geometry or other cell references. data formats such as Verilog, SDC, LEF/DEF, Standard Cell Library, GDSII file. Each design has a technology-code associated with the layout file. ReGDS, from GDSII to the gate-level netlist, to expose the. If you don't do this step, your LVS would not match for larger designs where this is required.ġ6) Generate a SPICE netlist from the design using the following sequence of commands:ġ7) After this step you will have cla.spice in layout directory and cla.spc in synthesis directoryġ8) LVS is the step to match these two netlists Highly productive layout environment due to intuitive and powerful editing capabilities, interactive DRC and error viewing Fast GDSII file loading. It covers the whole electronic design process from Netlist-in to GDS-out.

Using the mouse controls - Left button to place the box and Right button to expand the box around the layout and then pressing 'x' will make the layout more clear and detailedġ4) Now connect the VDDs and GND across different levels as done (shabbily!) in the above screenshot.

Gds file semiconductor