A caster wheel device for a domestic appliance is in the form of a wheel mounting carriage, a dial having an underside forming a cam, a cam follower that contacts the cam, a wheel bracket and a wheel. The wiring structure includes a reflection portion having a reflection surface reflecting light transmitted through the semiconductor layer from the second face toward the first face, toward the semiconductor layer, and an insulation film located between the reflection surface and the first face. The layer and supporting substrate are pressed against the ink-inlet surface of a channel wafer with an optional adhesive layer to bond the layer to the ink inlet surface. The abnormal-angled dopant implantation uses a first acceleration energy and tilt angle of greater than about zero degrees. Each latching member includes a connecting plate, two latching portions extending up from the connecting plate to latch tops of the corresponding expansion cards, and two resilient hooks extending down from the connecting plate to latch the locking members at the same end of the expansion slots. Advantageously, the surgical positioning assembly allows access to the implantation site to be gained along a first axis, with the implant device subsequently being placed along a second axis that is disposed at an angle or substantially perpendicular to the first axis via the actuation of the surgical positioning assembly.