| 摘要 |
A microwave integrated circuit includes a semiconductor substrate having semiconductor elements, such as transistors, diodes, resistors, and the like, and a passive circuit substrate having passive circuit elements, such as microstrip or coplanar transmission lines, spiral inductors, capacitances, and the like, on its front surface. The passive circuit substrate is mounted on the semiconductor substrate so that the rear surface of the passive circuit substrate faces the surface of the semiconductor substrate on which the semiconductor elements are present, and the semiconductor elements are electrically connected to the elements or grounding conductors of the passive circuit substrate via through-holes or bumps. The passive circuit substrate comprises a thin dielectric film having less dielectric loss than the semiconductor substrate, and the passive circuit elements, especially the transmission lines, are disposed on the dielectric substrate. Therefore, the transmission lines have a very small loss in a range from microwave to millimeter-wave frequency band. <IMAGE> |
