Semiconductor Capacitors With Series Protection For Reliability
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Solution Overview
Problem
Semiconductor devices face challenges with the reliability of large-area capacitors due to potential failures from defects or wear, which can lead to catastrophic failures and voltage fluctuations during current switching, as existing protection mechanisms are inadequate in preventing such failures.
Innovation Solution
Incorporating protection structures with redundant capacitors or fuses in series with the capacitors, which allow for self-diagnosis and isolation of faulty units, preventing catastrophic failures by maintaining circuit integrity even if one capacitor fails, and ensuring minimal capacitance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If large-area capacitors are used to store electrical charge and absorb current switching glitches, then the capacitance value and charge storage capability are improved, but the reliability deteriorates due to potential defects or wear causing catastrophic failures
Solution Approach 1:
The large-area capacitor is divided into multiple smaller capacitor units arranged in parallel. Each unit has its own protection device (fuse or redundant capacitor). This segmentation reduces the impact of defects - if one unit fails, only that unit is affected while others continue to function, preventing catastrophic failure of the entire capacitor structure.
Solution Approach 2:
Protection devices (fuses or redundant capacitors) are pre-installed in series with each capacitor unit before operation. These protection devices act as a buffer against potential failures - fuses break circuit upon defect detection to isolate faulty units, while redundant capacitors provide backup capacitance. This beforehand cushioning ensures that defects or wear in one unit do not propagate to cause catastrophic system failure.
2Reliability
If protection structures with redundant capacitors or fuses are added in series with capacitors, then the reliability is improved by preventing catastrophic failures, but the device complexity increases
Solution Approach 1:
The protection structure is segmented and integrated at the unit level rather than adding a separate complex protection system for the entire capacitor array. Each capacitor unit is paired with its own simple protection device (fuse or redundant capacitor), creating modular units that are easier to manufacture and test individually while maintaining high overall reliability.
3Reliability
If multiple capacitor units with protection devices are used, then the reliability is improved through self-diagnosis and isolation of faulty units, but the manufacturing process complexity increases
Solution Approach 1:
The protection devices (fuses or redundant capacitors) are merged with the capacitor units in a unified structure where each unit is self-contained. This merging allows all units to be manufactured, tested, and assembled together as modular components, simplifying the overall manufacturing process compared to adding separate protection systems after capacitor fabrication.
Data Source
AI summary
Semiconductor devices, methods of manufacture thereof, and capacitors are disclosed. In some embodiments, a semiconductor device includes a first capacitor and a protection device coupled in series with the first capacitor. A second capacitor is coupled in parallel with the first capacitor and the protection device.