Semiconductor Chip Damage Detection via Interconnect Voltage Monitoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional semiconductor chip protection devices consume excessive power due to the current passing through diffusion resistors, and they fail to detect damage in metallic interconnect layers and dielectric layers, which are common areas of damage.
Innovation Solution
A semiconductor chip design incorporating a current source, a detection circuit, and active components connected in series, with conductive interconnects that allow precise current and voltage setting, enabling efficient power consumption and detecting damage in semiconductor chips, including cracks and corrosion at lateral edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a diffusion resistor is used to detect cracks in semiconductor zones, then crack detection capability is improved, but power consumption increases
Solution Approach 1:
The patent extracts the detection function from the semiconductor zone itself and places it in the metallic interconnect layer. By monitoring voltage changes in the interconnect layer rather than using diffusion resistors in the semiconductor zones, the system achieves crack detection without the high power consumption associated with resistor-based methods.
Solution Approach 2:
The patent introduces the metallic interconnect layer as an intermediary element for detection. Instead of directly monitoring semiconductor zones with power-consuming resistors, the interconnect layer serves as a mediator that exhibits detectable voltage changes when cracks occur, enabling low-power monitoring.
2Reliability
If diffusion resistors are used for protection, then crack detection in semiconductor zones is enabled, but damage detection in metallic interconnect layers and dielectric layers is not achieved
Solution Approach 1:
The patent makes the metallic interconnect layer serve multiple functions: it acts as both the structural interconnect element and the detection element. This universal approach allows the same layer to provide electrical connectivity while simultaneously enabling detection of cracks in the interconnect layer, dielectric layers, and semiconductor zones, thus achieving comprehensive damage detection coverage.
3Device complexity
If conventional protection devices are used, then simple crack detection is achieved, but precise current and voltage management is not possible
Solution Approach 1:
The patent replaces the mechanical/resistive detection method with an electrical field-based detection method. By monitoring voltage changes in the metallic interconnect layer caused by crack-induced resistance changes, the system achieves precise current and voltage management and detection without requiring complex resistor networks or mechanical sensing elements.
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 design reduces power consumption while effectively detecting damage in semiconductor chips, including cracks and corrosion, and can be integrated with existing components, such as temperature sensors, to provide reliable fault messaging and minimize additional circuitry and wiring.
Implementation Method 1
a current source coupled between a first potential and an electrical node, a detection circuit having an input coupled to the electrical node
Implementation Method 2
A current flow may thereby arise from the first potential through the current source and through the active component to the second potential. The connection node may be coupled to an input of the detection circuit. The detection circuit may detect damage in the semiconductor chip on the basis of the potential of the connection node
Data Source
AI summary
A semiconductor chip having a current source coupled between a first potential and an electrical node, a detection circuit having an input coupled to the electrical node, and a first active component coupled in series with the current source and further coupled between the electrical node and a second potential, wherein the first active component is coupled to the electrical node via a first conductive interconnect.