Patent ID: 6882026
Filing Date: 2005-04-19
Classification: H01L

Abstract:
1. A semiconductor apparatus comprising: a GaAs substrate having a front surface and a back surface, the front surface consisting of a (100) crystal plane; a plurality of semiconductor elements formed on the front surface of the GaAs substrate, each semiconductor element having a plurality of electrodes; a surface metal layer connected to at least one of the electrodes of each semiconductor element and located above the semiconductor elements; a backside metal layer provided on the back surface of the GaAs substrate; via holes passing through the GaAs substrate and located in proximity of the semiconductor elements; and via hole conductors embedded within the via holes; wherein at least one via hole is provided in correspondence with one semiconductor clement, each via hole having a hole edge rectangular in shape at the front surface, and a longitudinal direction of the hole edge of the via hole is parallel to the [011] direction of crystal orientation of the GaAs substrate.