Semiconductor device and a method of manufacturing the same

A method of manufacturing a semiconductor device comprising:

• providing a laminated substrate, which includes an insulating plate, a circuit board that is provided on a front surface of the insulating plate and on which a semiconductor chip is disposed, and a metal plate that is provided on a rear surface of the insulating plate, on a heat sink such that the metal plate is joined to the heat sink;
• housing the semiconductor chip and the laminated substrate in a case, such that a connection terminal extends through the case to contact the circuit board, the connection terminal including an internal joint portion at one end which is exposed to an inside of the case, a central portion that is embedded in the case, and an external joint portion at another end that is exposed from the case, the connection terminal provided, between an inner surface of the case and the internal joint portion, with a shock-absorbing portion provided with a first member that is connected to an end of the internal joint portion so as to extend upward perpendicular to a main surface of the laminated substrate, a second member that is connected to an end of the first member so as to extend in parallel with the main surface of the laminated substrate, a third member that is connected to an end of the second member so as to extend downward perpendicular to the main surface of the laminated substrate, and a fourth member that is connected to an end of the third member so as to extend in parallel with the main surface of the laminated substrate, is embedded in the case, and has an end portion that is connected to an end of the external joint portion;
• and
• perpendicularly pressing the internal joint portion of the connection terminal onto the circuit board with a contact while ultrasonically vibrating the contact, the contact having a bar-shaped main body portion and a pressing portion that is at a front end portion of the main body portion and has a diameter narrower than a diameter of the main body portion.