| 摘要 |
PURPOSE:To keep the delay time of a signal to a minimum by wiring a signal line not to be affected by influence of permittivity of the substrate. CONSTITUTION:A current for a power source is fed from a semiconductor element 1 to conductive path 9 through wirings 7 for the power source, and to the interior of an electrically insulating substrate 2. Then, the current is transmitted to metal pins 5 for the power source at the end of the substrate 2, and fed out of a package. The self-induction component of the path depends upon the lengths and sectional areas of the wirings 7, the path 9 and pins 4 for signal lines. On the other hand, since the periphery of the path 9 is surrounded by conductors and two paths of different potentials are opposed at a near distance, its capacitive component is increased. Thus, a transmission path is so provided as not to be affected by the influences of the inductance and capacitive components as a signal current as much as possible and also so provided as to increase the capacitive component while decreasing the inductive component as a power source current. In this manner, a signal transmission delay time can be shortened. |
