Integrated Circuit Redundant Unit Replacement Mechanism
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Solution Overview
Problem
Integrated circuits face challenges in efficiently replacing defective components during manufacturing or operation, as existing failover mechanisms are not adequately addressed, leading to potential system failures.
Innovation Solution
A method and apparatus for repairing integrated circuits by fabricating circuits with regular and redundant units, performing tests to identify defective units, and activating redundant units to replace them, using redundant control circuits with receiving devices, fuse elements, and controllers to manage the replacement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant units are added to provide failover mechanism, then system reliability is improved, but device complexity increases
Solution Approach 1:
The circuit is segmented into regular units and redundant units, each with distinct functions. Regular units perform primary operations while redundant units stand by for failover. This segmentation allows the system to maintain reliability through redundancy while managing complexity by clearly defining the roles and activation conditions of each segment.
Solution Approach 2:
Redundant units are pre-configured with the capability to replace regular units before any failure occurs. The redundant control circuits are pre-programmed with replacement logic, and the system is designed so that redundant units can be activated immediately upon detection of a regular unit failure, eliminating the need for complex real-time decision-making during failure events.
2Manufacturing precision
If multiple test levels are performed to identify defective units, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The system performs a first level of testing during manufacturing to identify defective regular units before the circuit is deployed. This preliminary identification allows for proactive replacement using redundant units, avoiding the need for complex troubleshooting and multiple test iterations after deployment, thereby maintaining both high precision and productivity.
Solution Approach 2:
The redundant control circuits automatically detect and activate redundant units to replace defective regular units without requiring external intervention or complex manual testing procedures. This self-service capability streamlines the repair process, maintaining high manufacturing precision through automated detection while preserving productivity by eliminating manual retesting cycles.
3Reliability
If redundant control circuits with fuse elements are used to manage replacement, then reliability is improved, but ease of repair worsens
Solution Approach 1:
The redundant control circuits are designed to automatically detect failures in regular units and activate appropriate redundant units without requiring manual intervention. The fuse elements automatically indicate the status of redundant units, enabling the system to self-manage the failover process. This automation improves reliability while maintaining ease of repair by eliminating the need for complex manual diagnostic and activation procedures.
Solution Approach 2:
The fuse elements provide immediate feedback on the availability status of redundant units. When a redundant unit is activated, its associated fuse element changes state to indicate the replacement relationship. This feedback mechanism simplifies the repair process by providing clear, automatic status indication, eliminating the need for complex manual tracking of redundant unit assignments while ensuring reliable failover operation.
Data Source
AI summary
A method for repairing an integrated circuit comprises: fabricating a first circuit, the first circuit including a plurality of regular units and a plurality of redundant units, each of the regular units being identified by an address; performing a first test on the first circuit to determine if a defective regular unit is present; activating, if the defective regular unit is present, at least a first redundant unit to replace the defective regular unit, the first redundant unit being identified by an address of the defective regular unit; performing, if the at least first redundant unit is present, a second test on the first circuit to determine if the first redundant unit is defective; and activating at least a second redundant unit to replace the defective first redundant unit, the second redundant unit being identified by the address of the defective regular unit.