How to layout the pads? Questions and Answers

[biplob]

”vdd pad“ layout

hi frnds

i am new to layout design. i hv learned the process ...hw to make layout. i am using mentor graphics and tsmc035 technology. nw i am facing problem in pad layout . i dont have any idea how to layout the pads. anybody please help me out in this regards.

with luv
biplob.

 

[climber73]

gndpad

Hello,
in your "Design Rule Manual" or "Assembly Rule Manual" you should find all the info about the PAD.
Usually different PAD structure are are used for different use, es: RF signal PAD, Power supply PAD, Wire bonding, Bumping .......

Bye

 

[forkschgrad]

Re: pad layout

climber is right. start first with the rules. be familiar with the layers that must be present. usually it's already made and can be found in the library cells if you have it.

 

[biplob]

Re: pad layout

thanx friends for your suggestions...
i have found some pad cells (inbuilt) like GND PAD, VDD PAD, IN/OUT PAD etc for different technologies. but i dont know how to connect them.....i also could not find out the DESIGN RULE MANUAL, its not there.......do u have PDF version of the manual ?? can u give me ??? i will b very helpful then..

 

[forkschgrad]

Re: pad layout

try reading the art of analog layout by alan hastings. u can download it here in edaboard. u can search fot it.

 

[Brittoo]

Re: pad layout

thanx friends for your suggestions...
i have found some pad cells (inbuilt) like GND PAD, VDD PAD, IN/OUT PAD etc for different technologies. but i dont know how to connect them.....i also could not find out the DESIGN RULE MANUAL, its not there.......do u have PDF version of the manual ?? can u give me ??? i will b very helpful then..

Hi biplob

Its highly unlikely to not find the Design rule file as it should be your point of reference always. Take a detailed look at the PDK and you would find it there for sure. Now, what exactly is expected from you? Do you have to bulid the pads from scratch or do you have to do a layout that has pad as well as clamp circuit in it?

Regards
Brittoo

 

[biplob]

Re: pad layout

dear Brittoo


may b there is some problem in installion, that the Design Rule Manual is not there. i want to do a layout that has pad as well as clamp circuit in it. the pad layout are already there in adk library as seperate cells. please tell me how can i do it.

regards
Biplob

 

[chenjia]

pad layout

reinstall the PDK, and ask tsmc for the detail design manual

 

[biplob]

Re: pad layout

i could not find the PDK. please tell me wat is this stand for...and where i will get it???

can any body tell me hw bright is the future in layout design?? how can i get a job in industry..i am from India.

 

[biplob]

Re: pad layout

dear friend

Please let me know how to design for for laying out the pads..specially the corner pads...how to connect them..


biplob..

 

[test_out]

pad layout

We often advoid to use the conner pads because it is not easy to make latter wire bonding.
The layout of pads depends on the process.

 

[sandeep_torgal]

Re: pad layout

dear friend

Please let me know how to design for for laying out the pads..specially the corner pads...how to connect them..


biplob..

Usually we avoid corner pads due to issues in packaging. We have corner cells which might include some test structures.