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Recent content by ira2008

  1. I

    Question about low capacitance 'mimcap'

    Re: Question on 'mimcap' our company minimum capacitance is also 27fF, minimum width and length are all 5um. so there is no way to get smaller capacitances. i think.
  2. I

    IC Layout:- Running LVS

    you add dummy cells in your layout, so you must put the same dummy cells in your matching schematic.
  3. I

    why unit sized cap is always square

    According to matching theory, you should keep perimeter comparing to area the more smaller it is, the better matching it is.
  4. I

    Have a question about Space

    thanks very much and i got it.
  5. I

    Have a question about Space

    Hi all, can anyone tell me why we should keep the space between the power bus and signal line more than the minimum value required in the design rule? thanks your reply. Amy.
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    [SOLVED] Cadence Calibre PEX Simulation Error

    you must link to the svdb folder in your LVS run directory and not only to the run directory itself!
  7. I

    About CMIM mismatch????????

    Hi erikl, I think you are a very nice . and I can understand you. By the way, If you came to China in the future and gave me a opportunity, I would invite you to eat Chinese fine food.:grin: Thanks again. Best wishes Amy!
  8. I

    About CMIM mismatch????????

    Thanks for your professional suggestions. So for the MIM-CAP, the shape of the unit cap should be either square or rectangular. But the size should be kept less than 30um per side. Yes? For the width of metal lines which are used to connect top-plates and bottom-plates, I think minimum...
  9. I

    About CMIM mismatch????????

    [/COLOR] First, Very thanks. and I am sorry about that I am forgetting to tell you that unit cap can not be designed for square. Because my room is rectangle (width=40um length=500um) not square. so unit cap is not fit for square. Do you think so? I have selected unit cap equal 0.18um...
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    About CMIM mismatch????????

    Hi erikl, I have another question. there are two 2pF cap, How to make A cap and B cap to get good matching? Besides common centroid arrangement and add dummy cell . Actually I want to ask you how to choose unit cap value? Please give some advices. thanks very very much! Amy
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    About CMIM mismatch????????

    Hi erikl, I really appreciated you. Maybe occupying much of your spare time. on the whole, i understood your ideal. thanks again for your help. Hope you happy everyday. Best wishes Amy
  12. I

    About CMIM mismatch????????

    Very very thank you. by the way, the ratio match between cap how to calculate. What tool can verify it? or it can be calculated internally. yes or no? thanks in advance. Amy
  13. I

    About CMIM mismatch????????

    First of all, I appreciated your quick reply. According to your prompt, i looked design rule which is not any about some of the key parameters to mismatching. Thanks Amy
  14. I

    About CMIM mismatch????????

    Hi everybody, Can anybody tell me what tool can verify accurately layout mismatch . For example, my design engineer told me there are two mim caps . Their mismatch need to reach one thousandth . I have drawn this cmims. but i don't know if it satisfied his demands. What tool can verify it...
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    Latest tools for layout parasitic extraction

    my company use PVS tool to extract layout parasitic extraction. PS:PVS is a verification system: that is, a specification language integrated with support tools and a theorem prover. It is intended to capture the state-of-the-art in mechanized formal methods and to be sufficiently rugged that...
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