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Comment Re:Useless people prefer to talk. (Score 1) 601

Yes, there much chit-chat, but the chit-chat serves a purpose. Socializing with someone and building a relationship with them accelerates your ability to communicate with them when the real work needs to get done. However, time spent building those relationships may not be worth it if you don't end up needing to do real work together all that much.

Comment Re:Backwards processing (Score 2) 88

Inner layers are processed as you would expect. Etch resist is applied to the areas you want to keep, then copper is etched away. The outerlayers are different. The resist image applied to the board exposes the what you want to keep. It can be considered a "plating resist". The exposed image is then plated with copper (this is where the hole walls get plating) then tin. The resist is then removed. The tin then acts as the etch resist. It's a pain to etch through copper. That is why copper plating is only applied to where it is needed.

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