Group III-V Device Structure With Through Via

The patent applies preliminary anti-action by introducing a gate electrode structure that pre-establishes the capability to deplete the two-dimensional electron gas at the hetero-junction. The gate electrode is positioned and configured in advance to exert control over the channel, enabling the device to be turned OFF when needed. This preliminary setup of the control mechanism allows the device to transition from a normally ON state to a controllable state, preventing unwanted current flow before it becomes a problem in power applications.

The patent applies segmentation by dividing the through via formation into distinct stages: first forming the via hole through the substrate, then filling it with conductive material to create the through via structure. This segmented approach allows for better control over each step of the process, enabling the reduction of inductance and contact resistance while managing the fabrication complexity through systematic process breakdown.

The patent applies local quality by selectively thinning the semiconductor substrate in specific regions while maintaining appropriate thickness in other areas. This localized thinning approach allows for improved heat dissipation in critical areas where thermal management is most needed, while preserving the mechanical strength and structural integrity of the substrate in regions that require support. The selective modification of substrate thickness creates different local properties optimized for different functional requirements.