Capacitor Seal Ring Structure for Singulation Damage Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Decoupling capacitors suffer from damage such as die chipping and die edge cracking during singulation, degrading their reliability due to the lack of effective protection during the manufacturing process.
Innovation Solution
A seal ring structure is laterally integrated around the capacitor structure, made of materials with higher density and hardness than the capacitor, providing protection during singulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IPD capacitors are manufactured using conventional singulation operations, then production efficiency is maintained, but the capacitors suffer damage such as die chipping, die edge cracking, or defect intrusion which degrades reliability
Solution Approach 1:
The seal ring structure is formed around the capacitor structure before the singulation operation. This preliminary protective structure prevents damage during subsequent cutting processes, allowing standard singulation methods to be used while protecting the capacitor from die chipping and edge cracking.
Solution Approach 2:
The seal ring acts as a protective cushion that absorbs mechanical stress and prevents direct contact between the cutting tool and the capacitor structure. This beforehand cushioning protects against die edge cracking and chipping during the singulation process without requiring modified manufacturing equipment.
2Reliability
If a seal ring structure is added to protect the capacitor structure during singulation, then reliability is enhanced, but device complexity increases
Solution Approach 1:
The seal ring structure is integrated with existing capacitor components such as electrode extensions or conductive layers. By merging the protective function with existing structural elements rather than adding completely separate components, the increase in device complexity is minimized while still providing reliable protection during singulation.
Solution Approach 2:
The seal ring structure serves multiple functions: it provides mechanical protection during singulation, maintains electrical isolation between adjacent capacitors, and can serve as part of the electrode structure itself. This multi-functionality reduces the need for additional separate protective components, thereby limiting the increase in device complexity.
Data Source
AI summary
A capacitor device is provided. The capacitor device includes a capacitor structure, a conductive line, an interlayer dielectric (ILD) and a first via conductor. The capacitor structure includes a lower electrode and an upper electrode. The conductive line is leveled with the lower electrode and electrically isolated from the lower electrode. The ILD is disposed over the capacitor structure and the conductive line. The first via conductor is adjacent to the capacitor structure and electrically coupled to the conductive line. A method for manufacturing a capacitor die is also provided.