September 7, 2020
Motorola MWA120 - hybrid 0.4GHz RF amplifier : weekend die-shotCeramic substrate size 4265x4255 µm. Transistor die size 383x324 µm.
Thermal damage visible around resistor trim lines. Back in the days it could have even been CW laser, not ps/fs luxury we have now.
Update: Closer look at brutal trim line (~15µm wide) - molten metal splashed everywhere.
Resistors are thin-film Tantalum, rest of conductors is Gold. Ceramic substrate is alumina.