A capitalization-sensitive search is a feature that provides the ability to specify as search criteria both a term and a capitalization characteristic or signature of the term. An operation for avoiding the contamination of the other layer by the doping agent separates the steps of depositing each of the layers. No centrifugation step exceeds thirty seconds. By providing for interlocking engagement of the anterior cervical plate and cervical saddle plate, additional vertebrae can be stabilized without the need to remove the previously installed anterior cervical plate. Initially, a strong current coil and a weak current coil are induced at the same time, so that the HID single light emitting point are moved to the second position, and at end of a time period set in the timer, the strong current coil will be interrupted so that only the weak current coil is actuated to maintain the HID single light emitting point in the second position.