Problem About the PDK Generation

iutin

Dear friends,
I found on the cadence website a tool from cadence virtuoso namely Cadence PDK Automation System (Cadence PAS 3.1). This tool is used for the PDK generation because of the complicated flow of PDK building from a scratch. But I don't know which features do I need to run this tool. Could anyone please help me in this problem? I only wanna practice a full flow of generating a Pcell from the Skill Language.


By the way, there are the ROD Pcell in the Cadence Virtuoso Environment. But I can't find any document to try this Pcell generation method. The ROD Pcell is used to build a simple Pcell in Virtuoso Environment, you can find it by the link
IC614/dfii/bin/sample/ROD/RODPcell.

At last, another way to build the Cell is the use of Qcell, but I'm not really understanding the Qcell and Pcell in deep. I can't find the different between the PCell and QCell. Please, Help me in this problem. Thanks all of you a lot

nidon2003

Hi, i think u have no exp about development pdk.
And u can get the pdk source code(GTE source code) from cadence offical web.
In that, you can get lots of detail information  how to design a pcell in GTE and generate it by PAS.

For your last question
pcell means parameterized cell, which not only integrates the IC design experience, but also passed Foundry verification with DRC/LVS. So u can directly use them in your design.
Besides, pcell also contains: CDF(Component Description Format), which can transfer parameter into pcell to generate the layout.
qcell means quick cell (in my mind) which just support very simple functions, such as change  width/length for a mos and etc. In my opinion, qcell is a simple "pcell".