Patent ID: 8729740

Claim:
A semiconductor relay, comprising: first and second signal terminals; a substrate comprising signal patterns for forming a signal line, and a land, the signal patterns being located between the first and second signal terminals and being separated from each other; a first switch circuit comprising a semiconductor switch that is used to make or break a connection between the signal patterns and thereby to make or break a connection between the first and second signal terminals; and a control circuit comprising a control IC that is configured to control the first switch circuit to make or break the connection between the first and second signal terminals, wherein: the control IC is mounted on the land, the land having a size corresponding to the control IC, and a part or all of the land being included in a part of the signal patterns, the substrate is a dielectric substrate, the signal patterns for forming the signal line are in a shape of a straight line having a constant width, and are formed on a first surface of the substrate having a certain width, a ground pattern being formed on a second surface of the substrate along the signal patterns, the signal patterns in the shape of the straight line comprise: a first signal pattern connected to the first signal terminal; a second signal pattern connected to the second signal terminal; and a third signal pattern that is located between ends of the first and second signal patterns in an intermediate part of the signal line, and is separated from each of the first and second patterns, the third signal pattern includes the part or all of the land and is electrically insulated from the ground pattern by the substrate, the signal patterns including the part or all of the land, the ground pattern and the substrate constitute a microstrip line, and the first switch circuit is configured to make or break a connection between the first signal pattern and the third signal pattern, and to make or break a connection between the second signal pattern and the third signal pattern.