The invention provides a candle holding device, which has an outer tubular member and an inner tubular member mounted on a base. The driver device includes a first pre-driver unit that outputs a first driver control signal to the first driver transistor in response to the input signal; and a second pre-driver unit that outputs a second driver control signal to the second driver transistor in response to the input signal. The light diffusing assembly comprises an envelope and a reflector element having frusto-conical member and an aperture element disposed therein. Each insert has a protrusion with a particular cross-sectional shape running along the same longitudinal axis. A DTM manufactured by ion implantation is excellent in the surface flatness, and can solve the cross-talk problem by conducting the thermally assisted recording at a temperature between a Curie temperature of a portion where ions are implanted and a Curie temperature of a portion where ions are not implanted. Accordingly, the semiconductor memory device, when receiving a high frequency operation clock signal, can be tested without delay of a test time by using a test circuit operated synchronously with a low frequency operation clock signal.