Buster
A weapon with this special property fires blasts of disruptive energy that devastate shields but have difficulty penetrating physical armor. A buster weapon deals the indicated damage to a starship’s shields. If the shields in the quadrant are reduced to 0, split any remaining damage between the two adjacent quadrants’ shields. If the targeted quadrant’s shields and the shields of any adjacent quadrants are reduced to 0, halve any remaining damage before applying it to the starship’s Hull Points.
During a starship’s next engineering phase after being hit by a buster weapon (whether or not its shields were depleted), the DC of Engineering checks to divert power to the starship’s shields increases by 5.
Source
Starship Operations Manual pg. 13