Machine-Placed Adhesive Bridge for Circuit Board Fixturing during Singulation
Original Publication Date: 2007-Apr-27
Included in the Prior Art Database: 2007-Apr-27
A circuit board fabricated in a panel has a few break-out tabs within a rout gap around the periphery of the board. A simple plastic bar is packed in tape-and-reel form and machine-placed across the rout gap after parts are reflow soldered to the board. The bottom surface of the bar, at the distal ends, is coated with a UV-deactivated adhesive. Two or more bars hold the assembled circuit board in place during a routing operation that removes the break-out tabs. After routing, the panel is exposed to UV light to deactivate the adhesive, simultaneously releasing all of the bars. The universal, machine-placed adhesive bridge replaces high cost, complex mechanical fixture solutions and tedious manual alternatives. Both placement and removal are automated.