Transistors - die pictures

[magic]

PNP Darlington transistor with an integrated free-wheeling diode

Hmm, where exactly is the diode supposed to be?
Is this... from eBay?

[Noopy]

You can see it here. That´s not just a window in the passivation.
(https://www.richis-lab.de/Bipolar60.htm)




...or here...
(https://www.richis-lab.de/Bipolar59.htm)


I have done IR pictures and they show IR light exactly in this area. It all makes sense.


Someone has sent the part to me. I don´t know the history but it doesnt look like a fake to me.

[Noopy]

BDX66, now built by Philips. Same specifications...






The package contains a very large die on a large heatspreader.






The edge length of the die is 5,0 mm. The surface appears to be dirty in the top left-hand corner.




The MESA trench has been inserted extremely cleanly into the die.




As shown in more detail for the MJ3001 (https://www.richis-lab.de/Bipolar60.htm), a line runs as a resistor across the left-hand side of the die from the base to the emitter of the power transistor. The unusual contact area at the lower edge is interesting...


https://www.richis-lab.de/BipolarA65.htm