miekFeb 21

Here's a die shot of an RF MOSFET I fried. It's supposedly a Motorola RD01MUS1 (but could be a clone/fake).

I don't have (or want!) the chemicals to de-cap it properly so I tried the method of overheating the package & cracking it apart with pliers to pop out the die. Aside from a bit of epoxy still stuck to it, it worked out pretty well!

Show threadmiek
In the wide shot of it, it looks like there were some other designs on the wafer that were sliced through to cut this one out. (or maybe just test patterns?)
Feb 21 at 1:43pmWeb
Show threadAndrew ZonenbergFeb 21
@miek The stuff along the south edge is pretty clearly vernier patterns for inter-layer alignment, very common especially on older nodes using contact litho
Show threadmiekFeb 21
@azonenberg ahh, thanks!
Show threadAled;cdFeb 21
@miek @azonenberg right edge looks like a transistor test structure
Show threadAled;cdFeb 21
@miek @azonenberg with pads large enough to hit with a flying probe or a wire bonder