Patent ID: 8773141

Claim:
A test apparatus for testing a device under test comprising: a first test substrate and a second test substrate that are arranged to face each other; a first test circuit that tests the device under test and that is disposed on a side of the first test substrate that faces the second test substrate; a second test circuit that tests the device under test and that is disposed on a side of the second test substrate that faces the first test substrate; and a sealing section that is formed by sealing a space between the first test substrate and the second test substrate to enclose the first test circuit and the second test circuit in a common space that is filled with coolant, wherein the first test substrate and the second test substrate each include: a back-side wiring line formed on a back side of the test substrate opposite a side on which the corresponding one of the first test circuit and the second test circuit is provided; and a first through-hole that is formed to extend from a surface on which the corresponding one of the first test circuit and the second test circuit is provided to a surface on which the back-side wiring line is provided, and through which the corresponding one of the first test circuit and the second test circuit is electrically coupled to the back-side wiring line.