This invention relates to a planar transformer which includes a primary winding and a secondary winding defined by a first stage including at least one track on a first layer and at least one track on a second layer. The stripper member is adapted for inserting under a shingle has a first end portion and a second end portion. The device may have multiple PDN contexts established in the first RAT network. The plurality of burls project from the surface and have end surfaces to support a substrate. Heat generated in the fuse element is less likely to be released to a semiconductor substrate through the thick insulating film, but is more likely to be released to the semiconductor substrate through the thin insulating film. The acoustic wave receiver converts the detected acoustic waves into an electric signal, and an image forming apparatus generates image data by using the electric signal.