It shouldn't have battery effekt, but i think, if you use such needles as cups to the heat wouldn't be brought away from the DIE as efficientely as if the cups were drilled, because there you have two materials connected together.
__________________
P4 2,53 @ 3,02 | 1 GB Infineon DDR 333 | Chaintech Apogee 9ejl2 | Radeon 9500 Pro @ 370 / 330 46xx 3dmarks2k3
|