e LayoutEditorReduced Monday 8th November 2021
Hi, how does "cell flat" works?
I try to put all cells into one main final layout and delete all cells as the mask writing software does NOT chose the right cell.
What can I do? do I flats the final layout ? I tried to select whole design, select "cell flat" command, but nothing happened?
What is the correct way to do it?
Thanks
Roger
Jürgen LayoutEditorFull Monday 8th November 2021
If the mask writing tool does not choose the correct cell you usually have more than one top cell. Top cell are cells that are not used as reference by an other cell of the library. In the full version you have the feature *strip unneeded* under utilities/cell_tools. It will remove any cell from the library not needed in the current displayed cell. So afterwards the current displayed cell will be the last remaining top cell in the library.
With the reduced version you need to detect the other top cell manually and remove these cell. The best way to do it is cell/seleect_cell. It will display the cell hierarchy and can easily see any further top cells in the design.
*cell flat* will not remove any cell from the library, but remove hierarchy only. Selected references will be replaced by its content without changing the resulting design. The cell will remain in the library. *cell flat* will increase the file size, often drastically.
e LayoutEditorReduced Tuesday 9th November 2021
Thanks for your help. I'm using the reduced version. Now, I can "cell flat" the final design, and then delete all other cells, just keep the one cell - final cell and it works. not sure if this is the best way, but it works for me.
Jürgen LayoutEditorFull Tuesday 9th November 2021
That would be one way, but not the fastest with the reduced version. You just need to get rid of the other top cells. So you can go to cell/select_cell and remove all other top cell. Top cells are marked with a (\*) in that dialog