Provided is a method for manufacturing a semiconductor device whose electric characteristics are prevented from being varied and whose reliability is improved. A second surface opposite from the first surface of the base plate can include at least one radius of curvature defining a generally concave profile on the second surface or through the entire base plate. All five plates together move forward approximately 30 inches at a constant velocity, after the completion of the forward motion, each plate is retracted separately at approximately three times the velocity of the forward motion, to advance logs retained within a trough defined between the side plates in a stepwise forward motion. In an embodiment, the RF wireless power signal is transferred at a frequency of about 13. The hot-pressing unit is used to hot-press and weld the laminate dot by dot to bond the substrates along a closed curve eventually, thus making a semi-product of the filtering unit out of a portion of the laminate within the closed curve. 70% by weight a rare earth element, or mixture of the same including gadolinium; and incidental impurities.