|
1) The flexible circuit has to flex as part of its
function. Continual or dynamic flex applications where the circuit
maybe required to flex 10's of thousands of times
2) When fine lines and spaces
are required. In example, for a design requiring sub 5 mil lines and
spaces, using button plating won't add extra copper that makes the pattern
more difficult to etch
3) Very tight bend radius.
If a very tight or sharp bend radius is required to install a circuit,
button plating will help to make the circuit more flexible and more
reliable. |
1) Additional handling and process steps by the
manufacturer will increase cost.
2 ) Larger via / component pads are needed to allow for
any misregistration of the drilled hole to the button plating mask, and to
the final artwork pattern |
