Stacked Semiconductor Die Encapsulation With Anti-Arcing Layer
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Solution Overview
Problem
Semiconductor devices are prone to damage from electro-static discharge (ESD) during fabrication, leading to decreased yields.
Innovation Solution
The implementation of anti-arcing layers, formed from materials like titanium, to minimize charge accumulation and discharge during fabrication processes, protecting semiconductor dies from ESD damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor devices are fabricated using conventional processes without anti-arcing layers, then manufacturing simplicity is maintained, but electro-static discharge (ESD) damage occurs leading to decreased yields
Solution Approach 1:
An anti-arcing layer is formed on the semiconductor die before packaging operations. This preliminary protective action prevents ESD damage during subsequent bonding and de-bonding processes, thereby improving yield without requiring fundamental changes to the fabrication workflow.
Solution Approach 2:
The anti-arcing layer acts as an intermediary protective barrier between the semiconductor die and the packaging structure. This intermediate layer absorbs or dissipates electro-static discharge, protecting the sensitive semiconductor devices from ESD damage while allowing the packaging process to proceed.
2Reliability
If anti-arcing layers are added to protect semiconductor devices from ESD, then yield and reliability are enhanced, but manufacturing process complexity increases
Solution Approach 1:
The anti-arcing layer is formed as a preliminary step in the fabrication process, establishing protection before reliability-critical operations occur. This ensures consistent protective coverage and improves device reliability through a standardized, early-stage intervention.
Solution Approach 2:
The anti-arcing layer modifies the electrical parameters of the semiconductor device surface by providing controlled electrical conductivity or charge dissipation characteristics. This parameter change enables the device to withstand ESD events, thereby enhancing reliability.
3Object-affected harmful factors
If anti-arcing layers are implemented during fabrication, then charge accumulation is minimized, but additional manufacturing steps are required
Solution Approach 1:
The anti-arcing layer serves as an intermediary that actively manages charge accumulation during fabrication. This intermediate protective layer provides a controlled pathway for charge dissipation, minimizing ESD damage while integrating into the existing manufacturing framework.
Solution Approach 2:
The anti-arcing layer provides self-protective functionality to the semiconductor device, automatically managing charge accumulation and dissipation during fabrication and packaging operations. This self-service mechanism reduces ESD damage without requiring external intervention or complex monitoring systems.
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
The anti-arcing layers effectively reduce the risk of ESD, enhancing the yield and reliability of semiconductor devices by preventing charge-related damage during bonding, de-bonding, and other critical processes.
Implementation Method 1
forming an anti-arcing material layer covering sidewalls of the top tier semiconductor die, a back surface of the top tier semiconductor die and the back surface of the bottom tier semiconductor die
Data Source
AI summary
A device die including a first semiconductor die, a second semiconductor die, an anti-arcing layer and a first insulating encapsulant is provided. The second semiconductor die is stacked over and electrically connected to the first semiconductor die. The anti-arcing layer is in contact with the second semiconductor die. The first insulating encapsulant is disposed over the first semiconductor die and laterally encapsulates the second semiconductor die. Furthermore, methods for fabricating device dies are provided.