Serial Antifuse Blowing System with Self-Detection
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Solution Overview
Problem
Conventional parallel antifuse systems are inefficient and wasteful as they require complex logic and routing for addressing a large number of antifuses, and have issues with determining whether antifuses are fully blown, leading to suboptimal use of time and current resources.
Innovation Solution
A serial antifuse system where antifuses are accessed sequentially, using a 'handshaking' method with flip-flops to selectively blow antifuses based on a sequence, minimizing logic and routing needs, and allowing for self-detection of fully blown antifuses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a parallel scheme is used to access antifuses individually with unique addresses, then each antifuse can be selectively accessed, but the logic circuit complexity and routing complexity increase significantly
Solution Approach 1:
The patent divides the antifuse array into serially connected groups where antifuses are accessed one at a time through a sequential process. Instead of providing unique addresses to all antifuses simultaneously (parallel approach), the system segments the access process into time-division sequential steps, reducing the logic circuit complexity while maintaining selective access capability.
Solution Approach 2:
The patent transitions from a spatial parallel addressing scheme to a temporal sequential addressing scheme. By adding the time dimension to the access process, the system can selectively access antifuses without requiring complex parallel address decoding logic, thus reducing device complexity while preserving operational flexibility.
2Ease of operation
If a parallel scheme is used to access antifuses individually with unique addresses, then each antifuse can be selectively accessed, but the routing complexity increases significantly
Solution Approach 1:
The patent segments the antifuse access into sequential steps where only one antifuse is actively accessed at a time. This segmentation eliminates the need for complex parallel routing structures that would be required to simultaneously access multiple antifuses with unique addresses, thereby reducing routing complexity while maintaining selective access capability.
Solution Approach 2:
The patent moves from spatial parallel routing to temporal sequential routing. By organizing access in the time dimension rather than requiring multiple simultaneous spatial paths, the system achieves selective antifuse access with significantly simplified routing infrastructure.
3Ease of operation
If a fixed blowing time is given for each antifuse, then the process is simple to control, but it may be redundant or insufficient depending on the antifuses being blown
Solution Approach 1:
The patent implements feedback mechanisms where the system detects whether an antifuse has been successfully blown before proceeding to the next antifuse. This feedback loop allows the system to adjust the blowing process dynamically - continuing to apply voltage until the antifuse is confirmed blown, rather than using a fixed time parameter, thereby improving reliability while maintaining operational simplicity.
Solution Approach 2:
The patent transitions from a static fixed-time blowing approach to a dynamic adaptive blowing process. The system continuously monitors the blowing status and adjusts the voltage application duration accordingly, making the process flexible and responsive to actual antifuse conditions rather than relying on predetermined time values.
4Ease of operation
If a fixed blowing time is given for each antifuse, then the control process is simple, but time and current resources are wasted when blowing is redundant or insufficient
Solution Approach 1:
The feedback mechanism detects when an antifuse is already blown or cannot be blown, allowing the system to stop voltage application early. This prevents wasting time and current resources on antifuses that are redundant or failed, while maintaining simple control through automated detection and response.
Solution Approach 2:
The system uses self-detection capabilities to determine when an antifuse blowing is complete or failed, eliminating the need for external monitoring. The antifuse blowing process itself provides the feedback signal that determines when to stop, optimizing resource usage while keeping the control mechanism simple.
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
The serial system reduces circuit complexity, optimizes resource usage, and ensures reliable creation of electrical paths by sequentially blowing antifuses with efficient use of time and current resources.
Implementation Method 1
a relatively high voltage is applied across the terminals, breaking down the interposed dielectric layer and forming a conductive link between the antifuse terminals
Data Source
AI summary
A serial system and method for blowing antifuses are disclosed. One embodiment of antifuse system includes a plurality of latch devices connected in series from input to output. The system also includes a plurality of antifuses. The antifuses are configured to receive an output signal from a corresponding one of the latch devices. The plurality of latch devices includes a plurality of D flip-flops connected in series. Each of the D flip-flops is configured to receive an output signal from an immediately previous D flip-flop in the serial data flow and to provide an output signal to an immediately subsequent D flip-flop in the flow. In addition, the serial system provides self-detective antifuses, thus creating reliable electrical paths while saving antifuse blowing current resources and time.