A semiconductor device can include, e. The holding mechanism is adapted to hold the slide valve at a predetermined frontward position, and includes a latch member that is mounted to the power piston in such a manner as to be linearly movable in a radial direction, and a garter spring for biasing the latch member radially inward. The apparatus further includes a second antenna element located external the casing. The outer tubular shaft can be internally threaded to provide varying strength for retaining or releasing the fastener. A movement sensor is operatively mounted to the printhead module and senses movement of the printhead module along print media so that the printhead module can eject ink responsive to the sensed movement.