Patent ID: 9698125
Date: 2017-07-04
CPC Classifications: H01L,H02M

Claim:
1. A semiconductor device comprising: a ceramic substrate having a first surface, and a second surface located on an opposite side of the first surface; a plurality of metal patterns formed on the first surface of the ceramic substrate; and a plurality of semiconductor chips mounted on one or more of the plurality of metal patterns, wherein the plurality of metal patterns include: wherein when seen in a plan view, the first side of the first metal pattern includes: a plurality of first convex portions protruding toward the second side of the second metal pattern; and a first concave portion formed between the plurality of first convex portions, wherein when seen in a plan view, the second side of the second metal pattern includes: a second convex portion protruding toward the first side of the first metal pattern; and a plurality of second concave portions formed on both sides of the second convex portion, wherein when seen in a plan view, the plurality of first convex portions are provided so as to respectively protrude toward the plurality of second concave portions, and the second convex portion is provided so as to protrude toward the first concave portion, wherein the first surface of the ceramic substrate has: a first substrate side extending in a first direction; a second substrate side located on an opposite side of the first substrate side; a third substrate side extending in a second direction intersecting the first direction; and a fourth substrate side located on an opposite side of the third substrate side, wherein each length of the first substrate side and the second substrate side is greater than each length of the third substrate side and the fourth substrate side, and wherein each of the first side of the first metal pattern and the second side of the second metal pattern is provided along the first direction.