mnkr said:
why most of the people use pcb thickness 1.6mm.
This is what an ancient colleague of mine told me a few years ago:
1.6mm is the distance between 2 pins on a 2.54mm pitch IDC connector,
therefore a 1.6mm thick PCB fits snugly in between the two rows of
pins. Back in the day, an IDC connector could easily be fitted on the
edge of the board, soldering each row of pins to each side of the
board, making it easy peasy to build modular cards to fit onto a
backplane.
More likely is that some process or tool works at maximum yield /
efficiency pumping out 1.6mm glass-fibre weaves. It is the standard PCB
manufacturer thickness, if you do not specify the thickness in your
order/quote, they'll give you 1.6mm.
Alan
www.electronic-eng.com