Integrated Circuit Connector Access Region with Stopping Layers
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Solution Overview
Problem
The challenge in integrated circuits is preventing short circuits between adjacent conductive layers due to large interlayer connectors, which also leads to increased power consumption and RC delay, as existing solutions are not ideal for all circumstances.
Innovation Solution
The integrated circuit device features conductive and dielectric layers in an alternative arrangement with first stopping layers positioned above, ensuring no contact with conductive layers, reducing capacitance and preventing short circuits, while allowing precise OPC for enhanced manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the width of interlayer connectors is increased to ensure reliable contact, then contact reliability is improved, but the risk of short circuit between adjacent conductive layers increases
Solution Approach 1:
The patent introduces a multi-layer structure with conductive layers, dielectric layers, and stopping layers segmented at different heights. The stopping layers are positioned to prevent lateral expansion of connectors, effectively segmenting the connector's lateral growth and preventing short circuits between adjacent conductive layers while maintaining reliable vertical contact.
Solution Approach 2:
The dielectric layers serve as intermediary materials between adjacent conductive layers, providing electrical isolation. The stopping layers act as intermediary structures that constrain the lateral expansion of connectors, preventing them from bridging adjacent conductive layers while allowing vertical connection.
2Object-affected harmful factors
If the lateral dimensions of interlayer connectors are reduced to prevent short circuits, then short circuit risk is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The stopping layers are formed in advance before the final connector formation process. These pre-formed stopping layers establish predetermined lateral boundaries that constrain connector expansion during subsequent processing steps, reducing the precision requirements for connector alignment while maintaining safe lateral dimensions.
Solution Approach 2:
The patent changes the dimensional parameters of connectors by introducing stopping layers at specific heights, which control the lateral expansion of connectors. This parameter control allows connectors to maintain appropriate lateral dimensions for preventing short circuits without requiring extreme manufacturing precision.
3Productivity
If the spacing between conductive layers is reduced to increase density, then circuit density is improved, but capacitance between adjacent layers increases
Solution Approach 1:
The multi-layer structure with dielectric layers positioned between conductive layers segments the electrical fields, reducing capacitive coupling between adjacent conductive layers. This segmentation allows reduced spacing between layers for increased density while mitigating the capacitance increase that would normally result from closer spacing.
Solution Approach 2:
Dielectric layers serve as intermediary materials between adjacent conductive layers, providing electrical isolation and reducing parasitic capacitance. These dielectric layers enable closer spacing between conductive layers for increased circuit density while maintaining low capacitance through their insulating properties.
Data Source
AI summary
An integrated circuit device and a method for making it are provided. The integrated circuit device comprises plural conductive layers, plural dielectric layers and plural first stopping layers. The conductive layers are extending in a first direction. The dielectric layers are paralleled to the conductive layers, and the conductive layers and the dielectric layers are disposed in an alternative arrangement. The first stopping layers are disposed over the conductive layers and the dielectric layers. The first stopping layers make no contact with the conductive layers.