Semiconductor Contact Zone Segmentation for Thermal Management
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Solution Overview
Problem
Power switch components face significant power losses and local overheating due to contacting and housing components acting as heat sources, limiting current-carrying capacity and requiring larger, more costly switches, as conventional techniques fail to prevent local temperature increases effectively.
Innovation Solution
Incorporating non-conducting regions under the metal plating of the contact zone in semiconductor switches to influence current distribution and heat management, allowing for optimal heat dissipation by redirecting current flow around these regions, thereby reducing maximum temperatures and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional contacting techniques are used, then current conduction is achieved, but local temperature increases occur due to heat sources from contacting and housing components
Solution Approach 1:
The contact zone is segmented into conducting regions and non-conducting regions. The non-conducting regions are positioned directly under the metal plating to act as thermal barriers, while the conducting regions handle current conduction. This segmentation allows the contact zone to simultaneously conduct current and prevent local overheating by directing heat away from critical areas.
Solution Approach 2:
Different regions of the contact zone are assigned different functional qualities: conducting regions for current flow and non-conducting regions for thermal management. The non-conducting regions have different electrical and thermal properties compared to the conducting regions, creating local quality variations that optimize both electrical performance and thermal distribution.
2Reliability
If larger switches are provided to compensate for current limitations, then current-carrying capacity is increased, but system cost increases
Solution Approach 1:
By segmenting the contact zone into conducting and non-conducting regions, the invention enables smaller switches to achieve higher effective current-carrying capacity. The non-conducting regions prevent local overheating, allowing the switch to operate at higher currents without thermal damage, thus avoiding the need for larger, more expensive switches.
3Temperature
If non-conducting regions are introduced under metal plating, then maximum temperatures are reduced and local overheating is prevented, but forward power losses are not reduced compared to conventional components
Solution Approach 1:
The contact zone is divided into conducting and non-conducting regions, with the non-conducting regions positioned to intercept heat flow paths. This segmentation redirects heat away from the metal plating and bonding wires without significantly increasing the forward power losses, as the conducting regions maintain efficient current conduction while the non-conducting regions provide thermal management.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces local overheating and maintains forward power losses comparable to conventional components while enhancing thermal management, preventing damage to bonding wires and optimizing heat distribution across the contact zone.
Implementation Method 1
the current must search for paths around the non-conducting regions
Implementation Method 2
the contacting and housing components that may possibly be used for current conduction no longer represent heat sinks but are instead heat sources
Implementation Method 3
it is attempted to make better use of the thermal capacity of the semiconductor material
Implementation Method 4
Another effect, which also results in an increased power loss in the area of the contacting zone, is transverse conduction losses within the metal plating layer
Data Source
AI summary
A power switch component having a semiconductor switch and a contacting applied to a contact zone of the semiconductor switch is introduced. The contact zone has a semiconductor layer and a metal plating applied to the semiconductor layer. The semiconductor layer has at least one conducting region and at least one non-conducting region situated directly under the metal plating.