Electronics > Beginners
Chip making process
amyk:
--- Quote from: TheUnnamedNewbie on October 15, 2018, 06:18:08 am ---1 mm^2 of chip area can give you a lot of stuff though. Often people get limited by IO area - if you bond, you can only fit so much rows of bond pads on your chip.
--- End quote ---
See the sot23-6 PICs for an example. I don't think the die of those are larger than 1mm^2.
mikeselectricstuff:
--- Quote from: amyk on October 15, 2018, 11:29:18 am ---
--- Quote from: TheUnnamedNewbie on October 15, 2018, 06:18:08 am ---1 mm^2 of chip area can give you a lot of stuff though. Often people get limited by IO area - if you bond, you can only fit so much rows of bond pads on your chip.
--- End quote ---
See the sot23-6 PICs for an example. I don't think the die of those are larger than 1mm^2.
--- End quote ---
Just tried X-raying a 10F200 and 10F322 - unfortunately the die wasn't visible through the leadframe, but estimating from where the bond pads were, I'd guess 2-3mm^2
coppice:
--- Quote from: mikeselectricstuff on October 15, 2018, 12:17:12 pm ---
--- Quote from: amyk on October 15, 2018, 11:29:18 am ---
--- Quote from: TheUnnamedNewbie on October 15, 2018, 06:18:08 am ---1 mm^2 of chip area can give you a lot of stuff though. Often people get limited by IO area - if you bond, you can only fit so much rows of bond pads on your chip.
--- End quote ---
See the sot23-6 PICs for an example. I don't think the die of those are larger than 1mm^2.
--- End quote ---
Just tried X-raying a 10F200 and 10F322 - unfortunately the die wasn't visible through the leadframe, but estimating from where the bond pads were, I'd guess 2-3mm^2
--- End quote ---
Since those devices run at 5V, and presumably do not regulate inside the chip, they are probably on a 500nm or 800nm process. That does push the size up quite a lot, even for such a simple chip.
mikeselectricstuff:
I'm pretty sure the 10F322 uses a lower core voltage internally - there is an internal regulator "which provides operation above 3.6v" according to the datasheet
coppice:
--- Quote from: mikeselectricstuff on October 15, 2018, 03:25:04 pm ---I'm pretty sure the 10F322 uses a lower core voltage internally - there is an internal regulator "which provides operation above 3.6v" according to the datasheet
--- End quote ---
I missed that. If they are regulating to run the core at a maximum of 3.6V its probably a 350nm process.
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