How are PCB boards made in industry?
what causes they security alarm go off for no reason and wont go off 2001 toyata avalon
Sounds like your alarm system disabled the Ignition Switch. If it really is factory, bring it back to the dealer. It should have a lifetime warranty on the alarm. Sounds to me that something is wrong with it.
Starts with PCB boards which have complete copper cladding. Usually tracks are formed by eching with acid (although for small runs/prototypes it's sometimes milled off) Acid resist is placed/set where the copper is to be kept. (unset acid resist is removed) Then the board is dipped in acid to remove the unwanted copper.Then the board is washed to remove acid/acid resist
