Interposer Conductive Contact Area Scrambling
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Solution Overview
Problem
The design of 2.5D integrated systems is complex due to the need for managing a high number of connecting members between dies and the interposer, leading to bulky systems and high costs, with current technologies struggling to efficiently reduce the number of connecting members while maintaining functionality.
Innovation Solution
An interposer with conductive contact areas that short-circuit groups of electrically equivalent connecting members, reducing the number of connecting members through a scrambling mechanism, allowing for a simpler and more reconfigurable connection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high number of connecting members are used to interconnect dies in 2.5D integrated systems, then the electrical connection functionality is improved, but the system footprint and complexity increase
Solution Approach 1:
Multiple electrically equivalent connecting members (contact pads) are merged into a single conductive contact area through short-circuit connections. This combining approach maintains the electrical connection functionality while reducing the number of external bumps required, thereby decreasing the system footprint.
Solution Approach 2:
The conductive contact area serves multiple functions: it acts as a common electrical connection point for multiple equivalent connecting members, provides a scrambling mechanism to reduce bump count, and maintains signal integrity. This multi-functionality allows the system to achieve the same electrical connectivity with fewer external connections.
2Area of stationary object
If the number of connecting members is reduced through scrambling, then the system footprint is minimized, but the design complexity increases
Solution Approach 1:
The conductive contact areas are pre-configured during interposer fabrication to short-circuit specific groups of contact pads. This preliminary action establishes the scrambling pattern before die attachment, simplifying the overall design process by pre-defining the connection mapping rather than requiring complex post-assembly configuration.
Solution Approach 2:
The conductive contact area acts as an intermediary element between multiple contact pads and a single external bump. This mediator structure simplifies the design by providing a clear, standardized interface that automatically handles the scrambling function without requiring complex routing or connection logic.
3Quantity of substance
If conductive contact areas are added to short-circuit connecting members, then the number of external bumps is reduced, but the interposer manufacturing complexity increases
Solution Approach 1:
The scrambling function is extracted from the complex interposer-die-bump system and implemented as a simple, dedicated feature within the interposer structure. By taking out the connection management function and embedding it in the conductive contact areas, the manufacturing process becomes more straightforward and modular.
Solution Approach 2:
The conductive contact areas are integrated directly into the interposer substrate during fabrication, allowing the interposer to self-establish the short-circuit connections without requiring additional assembly steps or external components. This self-service approach simplifies manufacturing by incorporating the scrambling function into the base structure.
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
This solution effectively reduces the number of connecting members between dies and the interposer, minimizing the overall system footprint and costs, while maintaining efficient electrical connections, thus simplifying the design and implementation of 2.5D integrated systems.
Implementation Method 1
at least one conductive contact area (5), made of a conductive material and adapted to short circuit a plurality of connecting members (4a) connected at the contact area
Data Source
AI summary
An interposer for an integrated system comprises a plurality of first connecting members and a plurality of second connecting members to be electrically connected to each other and a contact area realizing an electric short circuit of a group of the first connecting members which are electrically equivalent or homologous transporting a same signal, the contact area being electrically connected with at least one of the second connecting members thus realizing a scrambling between a number of the first connecting members and a number of the second connecting members.