Microelectronic Package Debug Access Ports
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Solution Overview
Problem
Current microelectronic packages lack effective debugging solutions once attached to a motherboard, as desoldering disrupts the electrical state and has limited rework cycles, and field debugging is impractical due to accessibility issues.
Innovation Solution
Incorporating debug access ports within or on the microelectronic package, such as debug traces and solder bumps, to enable external probing without desoldering, allowing for electrical connection to internal circuitry for debugging purposes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If probe points are fabricated on the microelectronic substrate, then debugging access is enabled, but valuable space on the microelectronic substrate is consumed
Solution Approach 1:
The patent moves the debugging access points from the two-dimensional substrate plane to the three-dimensional package structure by forming access ports through the encapsulant material on the package body, enabling debugging without consuming substrate area
Solution Approach 2:
The debugging functionality is extracted from the substrate and relocated to the package itself, allowing the substrate to be used entirely for its primary function while the package provides both protection and debugging access
2Ease of operation
If the microelectronic package is desoldered from the motherboard for debugging, then internal circuitry becomes accessible, but the electrical state is lost and rework cycles are limited
Solution Approach 1:
The patent introduces an intermediary debugging interface that connects to internal circuitry through the package structure itself rather than requiring physical separation, allowing debugging while maintaining the package's electrical connections and state
Solution Approach 2:
The debugging access ports are built into the package structure during fabrication, enabling future debugging operations without requiring destructive desoldering or risking electrical state loss
3Reliability
If the microelectronic package is fully encapsulated for protection, then device reliability is improved, but debugging access to internal circuitry is blocked
Solution Approach 1:
The patent applies local quality by creating specific localized access regions through the encapsulant material while maintaining the integrity and protection of the overall encapsulated structure, allowing debugging at specific points without compromising general device protection
Solution Approach 2:
The encapsulant material is segmented to create discrete access ports that provide debugging pathways while leaving the rest of the encapsulation intact to maintain device protection and reliability
Data Source
AI summary
A microelectronic package may be fabricated with debug access ports formed either at a side or at a bottom of the microelectronic package. In one embodiment, the debug access ports may be formed within an encapsulation material proximate the microelectronic package side. In another embodiment, the debug access ports may be formed in a microelectronic interposer of the microelectronic package proximate the microelectronic package side. In a further embodiment, the debug access ports may be formed at the microelectronic package bottom and may include a solder contact.