Patent ID: 8610447

Claim:
Spring assemblies used in a test socket and compressed when lead terminals of a semiconductor chip press the spring assemblies, to electrically connect the lead terminals of the semiconductor chip to test terminals of a test device, comprising: first springs in which a first steel wire having conductivity is coiled in a spiral and which comprise first contacting parts in which the first steel wire is densely coiled so that coils thereof contact one another and first elastic parts in which the first steel wire is coiled so that coils thereof maintain distances from one another; and second springs in which a second steel wire having conductivity is coiled in a spiral and which comprise second contacting parts in which the second steel is coiled so that coils thereof contact one another and second elastic parts in which the second steel wire is coiled so that coils thereof maintain distances from one another, wherein the first springs are inserted into the second springs, and wherein the first contacting parts face the second elastic parts, and the first elastic parts face the second contacting parts, and wherein when the spring assemblies are compressed by the lead terminals, the second springs are disposed to be close to the first springs so that at least parts of the second contacting parts contact the first contacting parts.