A portable receiving structure for receiving an electronic device includes a soft unit, a hard unit and a retaining unit. The gradation processing portion performs the gradation expressing process in such a manner that enlargement of dots in the first and second basic cells adjacent to each other in the sub-scanning direction is inhibited in the sub-scanning direction until the dots are enlarged and connected to each other in the main scanning direction. The duobinary decoder is coupled to the sampling circuitry and converts the detected states to a PAM2 coded symbol stream. The apertures in the polyimide sheet are juxtaposed to the leads. Calculating a set of q programming levels which has a pre-determined property over time based on a variation of the parameter as a function of level and the model. In order to apply the multilayer TiN film to the fabrication of the semiconductor device, an insulating film having a contact hole is formed on a semiconductor substrate.