An inkjet printhead integrated circuit includes a multi-layer substrate that defines a plurality of ink inlet passages and incorporates drive circuitry. A mask is formed with a plurality of mask openings over the silicon layer. After the needle electrodes of the device are penetrated into a target tissue to be ablated, the intended volume of ablation can be configured in three dimensions. A disconnect tool facilitates the removal of the adaptor from the sub. The offsetting motion may be produced by an auxiliary scanner such as a mechanical scanner, a piezoelectric scanner, a MEMs scanner or other scanner.