I’ve always used Al and Au in mine but I’m in a research institute and so I can’t speak for what people use in real cameras, but it does appear that Ag is somewhat used in wire bonding, so you can be right!
But every element is pure, so it doesn’t make a lot of sense.
Was this purity in the sense of “absence of impurities” or “absence of evil”? Because if it’s the latter I’m pretty sure I’ve met a few Si wafers with evil agendas.
Not an expert, but CMOS sensors (which are the ones used in cameras? I think?) do not use silver, do they? It’s practically all silicon. (CMOS = Complementary Metal Oxide Semiconductor, where the semiconductor is Si, the metal is Al or more recently Poly-Si and the Oxide is SiO2 obtained by oxidizing the Si)
Unless Si also prevents vampire images from being seen? Does vampire lore explicitly say that all materials were tested and only Silver has anti-vampire properties?
I could be wrong on any of the info I just told you, even a cursory Google search can fail me.