Timeline for What is the standard procedure for analogue IC tapeout?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Mar 22 at 2:21 | comment | added | JkingNH | Nanofard’s 180nm =STI observation is correct, in my experience too, for TSMC and non-TSMC processes ( this was 10+ yrs ago, apologies. I worked in 350nm and 180nm, skipping 250nm)Using matching rules of thumb that worked for LOCOS usually gave acceptable results in 180nm. The exceptions(failures) lead to the in house work that resulted in new criteria for STI matching. As the nodes dropped to 130 and 90, those new rules became essential. My thanks to nanofarad for correcting my recollection! | |
| Mar 21 at 22:14 | comment | added | nanofarad | They're more fabrication techniques than layout techniques, but they do affect how you would do layout in certain cases (especially tight clearances, matching as JKingNH mentions, or where crosstalk isolation is important). Design rules are probably a good place to start, especially if they have good diagrams of suggested layouts. FWIW I used TSMC's 180nm process as well as 65nm, and that one was STI. It looks like it was 250nm and down for TSMC, but other fabs may vary. | |
| Mar 21 at 21:21 | comment | added | Jack Black | Hi @JkingNH, I'm using 130nm tech. I didn't know about STI/LOCOS before, are they layout techniques? | |
| Mar 21 at 17:38 | comment | added | JkingNH | What process node are you building the OTA in? Device matching techniques will be different for processes using STI(under 180nm) or LOCOS(180nm and up). | |
| Mar 15 at 14:58 | vote | accept | Jack Black | ||
| Mar 15 at 12:51 | comment | added | TLW | One generality that matters a lot to analog ICs: compared to discrete components their components are far less accurate, but far more precisely matched. This means that a lot of constructs that work well in discrete designs fall flat on their face in an integrated circuit, and vice versa. In general for ICs you want to design things such that what matters is the ratio between components, rather than the component values themselves. | |
| Mar 15 at 12:47 | comment | added | TLW | Slightly tongue-in-cheek: find the oldest jaded guy in the field you can & buy them a beer. | |
| Mar 15 at 7:40 | history | became hot network question | |||
| Mar 15 at 0:51 | answer | added | nanofarad | timeline score: 35 | |
| Mar 14 at 23:40 | history | asked | Jack Black | CC BY-SA 4.0 |