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Electrically programmable fuse system and testing method thereof

A test method and fuse technology, applied in static memory, instruments, etc., can solve problems such as defect rate, high signal input requirements, and increase user difficulty, so as to reduce the probability of error, avoid misjudgment, and simplify the difficulty Effect

Active Publication Date: 2020-12-25
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the existing Efuse system programming technology has strict timing requirements for input signals, which increases the difficulty of the user and affects the yield of the Efuse system; on the other hand, the Efuse unit will also There is a certain percentage of defect rate, so it is necessary to increase the design of Efuse redundant programming module. The existing Efuse system will require the user to use the same signal input to program the redundant programming module again.
[0005] However, the prior art requires the same programming for the Efuse cell array and the redundant programming module, so the user is required to input the same signal to the Efuse cell array and the redundant programming module, so that the user has high requirements for signal input, and when When the signal input deviates, the yield of the Efuse system will also decrease

Method used

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  • Electrically programmable fuse system and testing method thereof
  • Electrically programmable fuse system and testing method thereof
  • Electrically programmable fuse system and testing method thereof

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Embodiment Construction

[0032] It can be seen from the background art that the prior art has high requirements on the input signal of the Efuse array unit and the redundant unit, so that the accuracy of the signal input is high, and the yield rate of the electric programmable fuse system also needs to be improved.

[0033] refer to figure 1 , figure 1 It is the architecture diagram of the Efuse system of the prior art, and the Efuse system includes:

[0034]Efuse array module 10, the array that is made up of a plurality of electric fuse Efuse units, it can automatically find out the electric fuse unit that needs to operate according to the address signal of described input;

[0035] The decoding module coupled with the Efuse array module 10, the decoding module is suitable for interpreting the input address into the address corresponding to the electric fuse Efuse unit in the Efuse array module 10, for carrying out the Efuse array module 10 positioning during a read operation or a program operation...

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Abstract

The present invention provides an electrically-programmable fuse system and a testing method thereof. The electrically-programmable fuse system comprises: a logic control module, and a main programming module and a redundancy programming module respectively coupled with the logic control module. The logic control module is configured to input a programming control signal, generate a main input signal for controlling the operation of the main programming module according to the programming control signal, receive a main output signal fed back by the main programming module, and generate a redundant input signal for controlling the operation of the redundant programming module when detecting that the programming of the main programming module fails; the main programming module is configured to receive the main input signal, enter a programming state, and feedback the main output signal to the logic control module; and the redundancy programming module is configured to receive the redundant input signal, enter a programming state, and feedback the redundant output signal to the logic control module. According to the system and method provided by the present invention, input of the programming control signal by the user is simplified, and the yield of the electrically-programmable fuse system is improved.

Description

technical field [0001] The invention relates to the technical field of electric programmable fuses, in particular to an electric programmable fuse system and a testing method thereof. Background technique [0002] Efuse (Electrically Programmable fuse) technology is a technology developed by utilizing the characteristics of metal electromigration (EM). Unlike traditional laser fuse (Laser Fuse) technology, Efuse technology can be used to generate small Multiple electric fuse (E-fuse) structure. The initial resistance value of the electric fuse is very small. When a large current passes through the electric fuse, the electric fuse is blown and its resistance value doubles. A blown electrical fuse will remain permanently off, while an unblown electrical fuse remains on. Therefore, the storage unit constituted by the electric fuse can judge whether the electric fuse is blown to know the data stored inside it. [0003] Efuse technology is mainly used to repair chips in the fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C29/00G11C29/02
CPCG11C29/02G11C29/785
Inventor 陈罗平
Owner SEMICON MFG INT (SHANGHAI) CORP
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