3 ms·
Not an expert but essentially radiations can produce electrons in random places flipping one or more transistors unexpectedly. Larger transistors need more ele
by afiori 4y ago
Not an expert but essentially radiations can produce electrons in random places flipping one or more transistors unexpectedly.
Larger transistors need more electrons so they are slightly more resistant.
- denton-scratch 4y agoBecause larger transistors need more electrons, they also need more power to switch. I guess that circuitry made from valves/vacuum tubes might provide high radiation resistance?
- ilyt 4y agoI mean, you could just use big transistors
- geomark 4y agoThat's single event upset (SEU). The other radiation issue is total dose. That's when charge gradually builds up in insulating gates due to ionizing radiation. It's permanent, and eventually reaches the point that the transistor is always on so has a permanent fault. One of the factors is collection area, so larger gates are not less susceptible because they have a larger collection area. But if they run at a higher voltage that can make them more tolerant to total dose.
- ilyt 4y agoTHe other problem is that it can bump the atoms permanently off the silicon lattice, so permanent damage. Bigger transistor can just survive more hits