Patent ID: 9635769
Date: 2017-04-25
CPC Classifications: H01L,H05K,Y02P,Y10T

Claim:
1. An electronic device comprising: an electronic component; a base substrate to which the electronic component is fixed; a lid portion accommodating the electronic component in a space arranged together with the base substrate; a frame-like metallization layer arranged above the base substrate and bonding the base substrate and the lid portion together; and an electrode arranged above the base substrate, wherein the metallization layer and the electrode are insulated from each other, the metallization layer has a plurality of metal layers including a first metal layer, a second metal layer, and a third metal layer stacked above the base substrate, the first metal layer has a thermal conductivity that is less than or equal to 50% of a thermal conductivity of the second metal layer, in plan view, a width of the first metal layer that is located closest to the base substrate side is smaller than a width of at least one of the remaining plurality of metal layers, the second metal layer is sandwiched by the first and third metal layers; the third metal layer directly contacts each of the first and second metal layers, end portions of the third metal layer face and directly contact the base substrate, a portion of the third metal layer is located between the second metal layer and the base substrate, and wherein the first metal layer is a Ni—Cr-based alloy.