Abstract: A driver circuit for driving a load (3) connected between an output (FO) of a first channel driver (D1) and an output (RO) of a second channel driver (D2). The first and second channel drivers (D1, D2) each include switch transistors for charging and discharging the gates of upper and lower output transistors in response to a command from an input pulse, a charging/discharging circuit (A2, B2) for determining a charging/discharging speed, and a detector circuit (A1, B1) for detecting a state of the channel driver on the opposite side. A dead time period and a speed of charging/discharging the gates of the upper and lower output transistors are changed according to the state of the channel driver on the opposite side. Thus, it is possible to achieve a channel driver circuit which can prevent a shoot-through current, adjust an output slew rate, and obtain preferred linearity as an input-output characteristic.

Abstract: A protective agent 6 for protecting a wiring 1 is dispersed and placed in mottle-like on an interface between a via 3 and a wiring layer 2. Then, each dimension of interface regions 7 where the protective agent 6 does not exist is set to such a size that a plurality of conductive powders 4 constituting the via 3 can abutted on the wiring layer 2. Therefore, the plurality of conductive powders 4 and the wiring layer 2 are abutted each other in each interface region 7 where the protective agent 6 does not exist to electrically connect, thereby stabilizing the connection resistance for a prolonged period of time.