>>/47888/
It is still used in serially simple solutions. ... Well, split there for example a cheap watch or an office desktop calculator.
The feature is that the shellless chip crystals are diluted right on the board, everything on top is filled with epoxy. You can shove... in fact, how much heat sink you have enough, i.e. you can immediately a bunch of crystals nearby, which is often done. Well, it is necessary that the plant riveting chips and the plant collecting nodes was one plant, in the sense of one building, one workshop.
The USSR...maybe theoretically could, here I am not sure, but historically our factories were so formed that, as I wrote above, prevents such execution. The Japanese see the same thing.
As for disposability, I-I wouldn't say it's unreliable. The test of time has passed. And if a drop flies, then schematically there is no sense to repair - flew the most complex node with a price tag forming the price of the entire unit of the device (if not at all the device).