Patent ID: 7999369
Filing Date: 2011-08-16
Classification: H01L

Abstract:
1. A power electronic package comprising: first and second high thermal conductivity insulating non-planar substrates; and a plurality of semiconductor chips and electronic components, which are disposed between the first and second high thermal conductivity insulating non-planar substrates, wherein each of the first and second high thermal conductivity insulating non-planar substrates includes a plurality of electrical insulator layers and patterned electrical conductor layers, which are alternately stacked, the electrical conductor layers are connected to the electronic components with mechanical and electrical connection, each of the first and second high thermal conductivity insulating non-planar substrates further includes a plurality of raised regions or posts, the raised regions or posts are bonded together so that the first and second high thermal conductivity insulating non-planar substrates are mechanically and electrically connected, a number of the raised regions or posts, arrangement of the raised regions or posts, and a shape of each raised region or post are adjusted to have mechanical separation between the first and second high thermal conductivity insulating non-planar substrates, the electrical conductor layers are separated and isolated from one another so that a plurality of electric circuits is provided on at least one of the first and second high thermal conductivity insulating non-planar substrates, the mechanical separation between the first and second high thermal conductivity insulating non-planar substrates provides to reduce shear stress in the semiconductor chips and the electronic components, the number of the raised regions or posts is equal to or larger than four, the raised regions or posts are arranged symmetrically with respect to a center of the high thermal conductivity insulating non-planar substrate, each electrically inactive bonding region has a planar shape of a square with a rounded corner or a planar shape of a circle, and the rounded corner has a curvature radius equal to or larger than 0.6 mm, or the circle has a radius equal to or larger than 0.6 mm.