Trench Connection for Transistor Interconnects
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Solution Overview
Problem
In semiconductor manufacturing, existing smart power IC technologies face space constraints when interconnecting multiple components due to limited wiring levels, requiring efficient connection methods that minimize space usage while maintaining low resistance.
Innovation Solution
The method involves creating trench transistors and electrode structures within the semiconductor body, using common process steps to produce trench connection lines that can be arranged vertically and connected in a space-saving manner, allowing for efficient interconnection of components without requiring additional space on the semiconductor surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional wiring levels are used to interconnect components, then connection paths are established, but space consumption increases and manufacturing complexity increases
Solution Approach 1:
The patent transitions from planar wiring (2D) to vertical trench wiring (3D). Connection lines are routed through trenches etched into the semiconductor substrate, allowing connections to be made in the vertical dimension rather than requiring extensive lateral routing. This dimensional change enables compact integration of multiple components while reducing the horizontal area required for interconnections.
Solution Approach 2:
Multiple connection lines are nested within a single trench structure. The trench contains several conductive elements arranged vertically or laterally within the same substrate region, allowing multiple connections to share a common structural envelope. This nesting approach reduces the number of separate wiring structures needed and minimizes overall space consumption.
2Adaptability or versatility
If multiple wiring levels are added to increase connectivity, then more connection paths become available, but manufacturing complexity and device complexity increase
Solution Approach 1:
The connection routing function is segmented between vertical trench structures and horizontal contact pads. The trenches provide vertical access to subsurface components, while contact pads on the surface provide horizontal connectivity. This segmentation allows versatile connection paths to be achieved through simple, separate structural elements rather than complex multi-level wiring.
Solution Approach 2:
The trench structure serves multiple functions: it provides mechanical support, electrical isolation through dielectric layers, conductive pathways through metal fills, and structural templates for contact alignment. This multi-functionality eliminates the need for separate specialized structures for each function, reducing overall device complexity while maintaining versatile connectivity.
3Area of stationary object
If trench structures are used for vertical connections, then space is saved, but manufacturing precision requirements increase
Solution Approach 1:
Trenches are formed and filled with conductive material before final component assembly and wire bonding. This preliminary establishment of vertical connection paths ensures that subsequent processing steps have fixed reference structures to align with, reducing the precision requirements for later operations such as bond pad formation and wire placement.
Solution Approach 2:
Dielectric layers and contact pads serve as intermediary structures between the trench connections and surface components. These intermediaries provide tolerance buffering, allowing slight variations in trench dimensions without compromising final connection quality. The contact pads act as mechanical and electrical buffers that absorb manufacturing variations.
Data Source
AI summary
A semiconductor component arrangement includes a semiconductor body, a transistor structure, a further component, and at least a first electrode structure. The semiconductor body has a first side and a second side. The transistor structure is integrated in the semiconductor body, and includes a source and a drain. The further component is also integrated in the semiconductor body. The first electrode structure is disposed in at least a first trench, and includes at least one electrode. The first electrode structure electrically connects at least one of the source and the drain to the further component.