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Hello! Hello. It's #nakeddiefriday today, and I wanted to show you one of the older works. This is an automotive ASIC fabbed for Toyota, part number DF028. I do not know the function of this particular device.
SiPron page: https://siliconprawn.org/archive/doku.php?id=infosecdj:toyota:d028f
The die identifies itself as D028F though. Kinda the same thing. Has Toyota logo on, I wonder if they actually have silicon design teams.
This is made with a 2 metal layer process. The difference between the two layers is rather stark: M1 has a very warm colour, while M2 is the opposite. Polysilicon is coloured pink-ish.
The device is for the most part an analog design, with a small block of logic in the lower right corner of the image. They seem to employ a mix of FETs and bipolar devices: here, the device on the right side is certainly a MOSFET with poly gate, but the left side seems to be a whole lot of bipolar transistors?
The digital section looks very funky with those comically large vias between metal layers.
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