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vlovich123last Wednesday at 9:06 PM1 replyview on HN

From the paper

> footprint of 330 × 290 µm2 using the GlobalFoundries 45SPCLO

That’s a 45nm process but the units for the chip size probably should have been 330um? However I’m not well versed enough in the details to parse it out.

https://arxiv.org/abs/2503.19544


Replies

bgnnlast Wednesday at 9:27 PM

I'm very familiar with this process as I use it regularly.

The area is massive. 330um × 290um are the X and Y dimensions. The area is roughly 0.1 mm2. You can see the comparison on table 1. This is roughly 50000 times larger than an SRAM of 45nm process.

This is the problem with photonic circuits. They are massive compared to electronics.

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