Semiconductor Wafer Encapsulation for Delamination-Safe Singulation
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Solution Overview
Problem
The semiconductor industry faces challenges in reducing the physical size of semiconductor devices while minimizing damage during the singulation process, particularly due to peeling of dielectric layers.
Innovation Solution
A partial singulation process is implemented before full singulation, which involves forming openings in the semiconductor wafer, filling them with an encapsulant, and using a support structure to reduce delamination and enhance manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If repeated reductions in minimum feature size are implemented to increase integration density, then more components can be integrated into a given area, but the physical size reduction leads to increased vulnerability to damage during singulation and delamination of dielectric layers
Solution Approach 1:
The patent applies preliminary action by forming openings and filling them with encapsulant material before the singulation process. This pre-prepared encapsulation structure provides protective support during subsequent cutting operations, preventing delamination of dielectric layers that would otherwise occur due to the vulnerability of miniaturized features during singulation.
Solution Approach 2:
The patent uses an encapsulant material as an intermediary substance that fills openings in the semiconductor structure. This encapsulant acts as a mediator between the fragile miniaturized components and the mechanical stresses of singulation, providing structural support and preventing direct contact between cutting tools and vulnerable dielectric layers.
2Volume of moving object
If sophisticated bonding techniques are used to create stacked semiconductor devices, then physical size is reduced and functionality is enhanced, but the manufacturing process becomes more complex and yield is reduced due to delamination risks
Solution Approach 1:
The patent implements preliminary action by preparing the encapsulation structure before bonding operations. Openings are formed and filled with encapsulant material in advance, creating a protective framework that simplifies subsequent bonding processes by providing structural support and reducing the risk of delamination, thereby lowering overall process complexity.
Solution Approach 2:
The encapsulant material serves as an intermediary that facilitates the bonding process in stacked semiconductor devices. By filling openings and providing structural support, it mediates between bonding interfaces, ensuring proper alignment and reducing complexity associated with handling fragile miniaturized components during stacking operations.
3Ease of manufacture
If conventional singulation processes are used on miniaturized semiconductor devices, then manufacturing is simpler, but delamination of dielectric layers occurs and manufacturing yield decreases
Solution Approach 1:
The patent applies preliminary action by forming openings and filling them with encapsulant material before singulation. This pre-prepared encapsulation structure maintains manufacturing simplicity while dramatically improving yield, as the encapsulant provides protective support during cutting operations without adding significant process complexity.
Solution Approach 2:
The encapsulant acts as an intermediary protective layer during singulation. It mediates between the cutting tool and vulnerable dielectric layers, allowing conventional simple singulation processes to be used while preventing delamination and maintaining high manufacturing yield.
Data Source
AI summary
A semiconductor device and method of manufacture are provided wherein semiconductor devices are attached over a semiconductor substrate. An opening is formed within metallization layers over the semiconductor substrate and the semiconductor substrate, and an encapsulant is placed to fill the opening. Once the encapsulant is placed, the semiconductor substrate is singulated to separate the devices. By recessing the material of the metallization layers and forming the opening, delamination damage may be reduced or eliminated.