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45 Threads found on edaboard.com: Filler And Cells
Using the ECO flow is kind of advanced design technique. You are still struggling with really basic concepts. I can bet your restoreDesign command is pointing to the wrong thing, and your eco.v netlist is not "physical", therefore does not contain filler cells, welltaps, etc.
I got exact answer as follows, Main difference between Endcap cell is they have dummy poly. which Dcap or fillers does not have. SO it prevents any stress or DRC violation on actual circuit and design while fabrication. Have not seen actual layout of standard cell, will reply again after confirming it.
Hi All, Which type of filler cells should add in soc encounter,I have fill 1,2,4,8,16,32,64 sized and for well tap and end cap also the same values. Which size should i add ?? also while adding end cap cells,it is asking for precap cell and postcap cells ?? What i shud (...)
Did you add filler cells?
Hi, Pls share the detailed information on End Cap cells and filler cells in terms of structure and connection with the rails.
Hi, filler cells are added for n well, pwell and metal 1 continuity. Why should n well p well be continuous ? I understand that Metal 1 should be continuous for min density reasons and EM reasons. What exactly is power continuity ? Thanks in advance. :-D
Hi all, Please can me someone explain differences between these terms? macro cell filler cell ECO cell all are taken from TSMC 90nm PDK documentation. Thanks a lot.
As from the definition of ESD you can understand that uncontrollable current flows between source and drain which only stops when transistor breakdown happens . So that means ESD can destroy your whole chip. This ESD is also known as Latchup. so to overcome this we add filler cells which make the n-well continuous this (...)
Hello Guys, Recently I studied some where regarding filler cell like this can any one please explain the following statement in detail. filler cells also provide decoupling capacitance to complete the power connections in the standard cell rows and extend N-well and P-well (...)
well, normaly the std cell library provided some filler cell to fill the n-well and power rail between two std cell. but this step should be done by the PnR tool, not in virtuoso, or do you made a small block in the analog tool env? The filler cells are here to respect the DRC between two std cell not abuded.
Hi, Yes of course this filler and capacitors are needed to be included in the design is used for device encapsulation and to avoid uneccessary effects of fields that causes the chage in Bulk(silican die) properties... and you can route to VDD and GND using place and Route tool.. (...)
In my chip layout I got a DRC error stating LATCH UP; but after inserting the filler cells I didn't get a DRC error due to LATCH UP; So please tell me how filler cells prevents LATCH UP (as it is an empty cell without any function)
hi friends, i have one doubt. we are using filler cells in between physical design flow right, and metal filling is used at the final stage. what is the difference in between these two?? can any one explain on this
Hello people! I am trying to do floor planning for my design for the first time. Actually I have done the basic fllorplanning and have placed the i/o pads as well but not the macro cells ( placement in the core area) yet. I verified the geometry after this step and found a lot of spacing violations and short violations (...)
hai limitless_21, ? What are the various factors that need to be considered while choosing a technology library for a design? The technology lib should have all the cells which u are having in the RTL. Additionally It should have the filler,Tie, endcap and decap cells. Then the cells should have (...)
Hi, After I insert stdcell filler in my design ( insert_stdcell_filler -cell_without_metal {mv07fill8 mv07fill6 mv07fill4 mv07fillvcc1} -cell_with_metal {mv07fillvcc8 mv07fillvcc6 mv07fillvcc4} ), I run detail routing with incremental option. But the result is that ICC routed these filler cells and (...)
what will happen if we will not insert filler cells in empty space? at which stage we insert filler cells and spare cells in the flow?
The filler cells do not contain any devices - just M1 power rails and NWELL. So, nothing to compare during LVS.
Hi Guys, Are multi Vth filler cells only Nwell implants or are they full PMOS devices with VDD and VSS taps? As threshold voltage gets mentioned, I assume they have a gate and diffusion regions. If they are just Nwell implants on P substrate i.e. diodes, what is meant by threshold voltage? Thanks.
Hi. I am very new to the field of physical design and its still my initial days. I have frequently come across concepts like n-well continuity and power continuity in relation to filler cells and corner pads. I am unable picture these concepts and cannot really understand (...)