Random question related to the photos of the phone's motherboard: Why does the PCB have so many holes in it? It looks very unusual. There's quite a large area with nothing but holes.
Look at the video in the article around 7:29.
The article calls out the soldered-on heatsink plate, but it's not very clear from the pictures how it actually works in the stack-up without reference to the video. I don't know why they didn't do a better close up of both sides of that, maybe it's in a different article.
Here's a decent explanation: https://circuitcellar.com/research-design-hub/basics-of-desi...
“Circuit Cellar” reminded me of something, and led me to find this is the descendant of Steve Ciarcia’s 1980s BYTE magazine column. After several iterations, it looks like Steve sold it to an employee.
"Inspired by the starter key of the legendary Porsche 917..."