Removable Interposer for HBM Memory Segmentation
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Solution Overview
Problem
Legacy semiconductor packages face challenges in modularity and manufacturing yield, particularly with high-bandwidth memory (HBM) systems, where memory replacement is costly and rigid, and manufacturing throughput is complicated due to soldered interconnects, leading to increased maintenance and production costs.
Innovation Solution
The introduction of a system-on-package with a removable interposer that allows HBM memory to be detachable from the CPU, using optical signaling and non-permanent connections such as clamps or inductive coupling, enabling independent replacement and simplifying manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If HBM memory is permanently integrated with CPU in a soldered package, then system functionality and bandwidth are improved, but maintenance cost and complexity increase
Solution Approach 1:
The package is divided into separable components: the CPU remains permanently mounted on the substrate, while the HBM memory is mounted on a removable interposer that can be detached and replaced independently. This segmentation allows high-bandwidth integration during operation while enabling cost-effective maintenance by replacing only the memory portion rather than the entire CPU+memory assembly.
2Adaptability or versatility
If multiple components are permanently integrated in a single package, then system functionality is improved, but manufacturing yield and throughput are worsened
Solution Approach 1:
The manufacturing process is segmented into separate stages: the CPU is first mounted on the substrate, then the interposer with HBM memory is separately prepared and subsequently attached. This segmentation allows parallel processing of different components, simplifies quality control, and enables independent optimization of each manufacturing step, thereby improving overall throughput while maintaining system functionality.
Solution Approach 2:
The interposer serves as an intermediary component between the CPU and HBM memory, providing a removable interface that simplifies manufacturing. Instead of directly soldering multiple complex components together, the interposer acts as a mediator that can be independently manufactured, tested, and replaced, reducing manufacturing complexity and improving yield.
3Reliability
If HBM memory is permanently soldered to substrate, then connection reliability is improved, but modularity and replacement flexibility are lost
Solution Approach 1:
The connection between the memory system and substrate transitions from a static permanent solder joint to a dynamic removable connection. The interposer is permanently attached to the HBM memory with reliable solder joints, while the interposer itself connects to the substrate through a removable interface (such as a socket or mechanical attachment). This dynamic design maintains reliable electrical connections during operation while enabling modular replacement when needed.
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 reduces maintenance costs by allowing memory replacement without CPU replacement, simplifies manufacturing by decoupling components, and improves manufacturing throughput by reducing complex dependencies on multiple components and companies.
Implementation Method 1
communicatively coupled with the bridge by an optical link
Implementation Method 2
non-permanent connections such as clamps or inductive coupling
Data Source
AI summary
Embodiments may relate to a substrate for use in a system in package (SIP). The substrate may include a first couple to couple with a first component via a permanent couple such that the first component is communicatively coupled with a bridge. The substrate may further include a second couple to removably couple with an interposer such that the interposer is communicatively coupled with the bridge via a communicative couple. Other embodiments may be described or claimed.