| 摘要 |
PROBLEM TO BE SOLVED: To prevent leak of an RF signal from being generated by a method, wherein a semiconductor device is provided with a semiconductor substrate, a plurality of circuits provided on the substrate at a prescribed interval, and ground metal films provided on regions which are respectively held between the circuits on the substrate. SOLUTION: An LNA 1, an SW 3, an HPA 5, a control circuit 2 and a negative voltage-generating circuit 4 are arranged on a GaAs substrate 10 at prescribed intervals and, at the same time, the circuits 2 and 4 are arranged adjacent to each other, and ground metal films 6 are respectively arranged on the substrate 10 under a region held between these circuits 2 and 4 and the LNA 1 and the SW 3, and on the substrate 10 under a region held between the circuits 2 and 4 and the HPA 5. These films 6 are earthed, when the fellow circuits on this MMIC 100 are connected with each other or when the circuits on this MMIC 100 and other circuits than the MMIC 100 are connected with each other. Thereby the amount of isolation for the circuits is increased, and a leak of RF signal which is generated between the circuits can be prevented from being generated. |
