An implantable infusion pump to deliver stored infusate to a desired fluid delivery site. The board fixing portion includes a first fixing portion and a second fixing portion that are arranged in symmetrical relation with respect to the interconnecting portion. An active sensing element is within the cover and positioned away from the first end of the cover by at least about 10% of a total length of the cover. From a control signal supplied to it via the row electrode the pixel control unit generates locally and chronologically different turn-on signals for the various switches so that they switch chronologically successive different gray-scale levels of a gray-scale signal present at the column electrode through to the sub-pixel electrodes. 20, preferably at least about 0. The controller dynamically adjusts the injection molding process to achieve more consistent and reliable molded parts.