• 0 Posts
  • 18 Comments
Joined 1 year ago
cake
Cake day: June 20th, 2023

help-circle









  • You’re misunderstanding me.

    For instance, electrons always move the same speed in a given metal. Which of couse isn’t even ‘true’ because temperature affects mobility.

    There are multiple mechanisms for metal to migrate, grow whiskers, or whatever you like to call the individual growth on an object. I mentioned that in the case if ICs, we are concerned with one we call electromigration. I’m not saying all metal migration is due to electromigration.

    You’re being pedantic when all I’m saying is, I deal with these sorts of concerns in my job.




  • The mechanism behind metal whisker growth is not well understood, but seems to be encouraged by compressive mechanical stresses. According to Wikipedia.

    Electrons in metal always move the same speed, and potential differences in modern high perf applications are never above 3.3V. There are mechanical stresses in ICs introduced during manufacturing. So these cases aren’t as different as you let on.

    Anyway, point is, metal moves, we have some ideas why and can model some of them. From an engineering perspective these are both tin whiskers. We call whiskers made of copper and aluminum tin whiskers. You’re describing a distinction without a difference.