Abstract: A semiconductor device includes a substrate, a gate structure on the substrate, a source/drain (S/D) region and a contact. The S/D region is located in the substrate and on a side of the gate structure. The contact lands on and connected to the S/D region. The contact wraps around the S/D region.

Abstract: A socket wrench extension includes a main body having a first end to be releasably engaged with a socket wrench and a second end. A driving column is formed on the second end of the main body so as to be releasably engaged with a socket. The driving column includes a recessed section defined in a periphery thereof adjacent to the second end of the main body, and a shoulder is defined between the recessed section and the second end of the main body. The socket may be engaged with the recessed section of the socket wrench extension to allow angular joint therebetween for operation in a difficult-to-operate condition. Alternatively, the socket may be engaged with the shoulder of the socket wrench extension to provide high torque transmission therebetween in which a longitudinal axis of the driving column coincides with that of the socket.

Abstract: A socket wrench extension includes a main body having a first end to be releasably engaged with a socket wrench and a second end. A driving column is formed on the second end of the main body so as to be releasably engaged with a socket. The driving column includes a recessed section defined in a periphery thereof adjacent to the second end of the main body, and a shoulder is defined between the recessed section and the second end of the main body. The socket may be engaged with the recessed section of the socket wrench extension to allow angular joint therebetween for operation in a difficult-to-operate condition. Alternatively, the socket may be engaged with the shoulder of the socket wrench extension to provide high torque transmission therebetween in which a longitudinal axis of the driving column coincides with that of the socket.