Patent ID: 8045352
Filing Date: 2011-10-25
Classification: H01L,H02M,H05K

Abstract:
1. A power converter, comprising: a switching device constituting each of upper and lower arms, the switching device being composed of plural semiconductor chips, the plural semiconductor chips being connected in parallel and evenly divided into a first group and a second group; an insulating substrate having thereon plural circuit patterns; a positive conductor and a negative conductor being insulated from and disposed adjacent to and parallel to each other; a capacitor having a positive terminal and a negative terminal, the positive terminal being connected to the positive conductor, the negative terminal being connected to the negative conductor; and an output electrode being connected to a node between the upper and lower arms, wherein the positive conductor includes a first terminal portion and a second terminal portion, the first terminal portion is joined to a circuit pattern on which the first group of semiconductor chips are mounted, and the second terminal portion is joined to a circuit pattern on which the second group of semiconductor chips are mounted, wherein the output electrode includes a base portion and an electrode portion, the electrode portion has an end portion being joined to the base portion, the base portion has a first connecting portion and a second connecting portion, the first connecting portion is joined to a circuit pattern that is electrically connected to the first group of semiconductor chips of the upper arm, and the second connecting portion is joined to a circuit pattern that is electrically connected to the second group of semiconductor chips of the upper arm, wherein the output electrode is formed so as to reduce or cancel a difference existing between an inductance L