Laterally Offset Via Connections for Dense Low-Loss Interconnects
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Solution Overview
Problem
Existing semiconductor manufacturing processes face challenges in maximizing via structure density and signal integrity while minimizing transmission losses and design constraints, particularly in connecting multiple levels of semiconductor devices.
Innovation Solution
The use of laterally offset via structures arranged in concentric hexagonal patterns, connected by conductive structures, to optimize inter-level connections and increase density, with each via structure connected to at least two vias on different levels, enhancing signal integrity and reducing transmission losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If stacked via structures are used to increase connection density, then the number of connections between levels increases, but transmission losses increase and certain materials become unsuitable
Solution Approach 1:
The patent transitions from vertical stacking of vias to a lateral arrangement where vias are offset horizontally. Specifically, first vias in a first level are connected to second vias in a second level through conductive structures, with the vias positioned at lateral offsets rather than directly stacked. This dimensional change from vertical to lateral connectivity reduces transmission losses while maintaining connection density.
Solution Approach 2:
The connection path is segmented into multiple components: first vias, conductive structures, and second vias. Instead of direct vertical connections, the signal path is divided into segments that include lateral transitions through dielectric materials, allowing optimization of each segment's properties to reduce overall transmission losses.
2Reliability
If laterally offset via structures are used to reduce transmission losses, then signal integrity improves, but device complexity increases due to multiple connection paths
Solution Approach 1:
The conductive structures serve multiple functions: they electrically connect first vias to second vias, provide lateral signal routing, and enable the via offset arrangement. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while achieving improved signal integrity.
Solution Approach 2:
The patent merges the via connection function with lateral routing functions into a unified structure. The conductive structures both connect vias vertically and route signals laterally through the dielectric, combining multiple functions into integrated elements that reduce overall structural complexity.
3Use of energy by moving object
If via structures are connected to at least two vias on another level, then power delivery efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The via structures and conductive structures are designed with predetermined lateral offsets and connection geometries established during the design phase. This preliminary planning of connection paths and offsets allows manufacturing processes to follow established patterns, reducing the actual precision requirements during fabrication while ensuring each via connects to at least two vias on another level for improved power delivery.
Data Source
AI summary
Connection structures and methods of manufacture in which a conductive structure is disposed between, and in electrical contact with, pluralities of via structures. Each via structure is laterally offset from adjacent via structures to avoid stacked vias, and each via is electrically connected to at least two additional vias on a level of a semiconductor device, through conductive traces and footprints of the connection structure.