Patent Number: 7,821,041

Title: Electrical fuse circuit for security applications

Abstract: A fuse circuit is disclosed, which comprises at least one electrical fuse element having a resistance that changes after being stressed in an electromigration mode, a switching device serially coupled with the electrical fuse element in a predetermined path between a fuse programming power supply (VDDQ) and a low voltage power supply (GND) for selectively allowing a programming current passing through the electrical fuse element during a programming operation, and at least one peripheral circuit coupled to the VDDQ, wherein the peripheral circuit is active and draws current from the VDDQ during a fuse programming operation.

Inventors: Chung; Shine (Taipei Hsien, TW), Hsueh; Fu-Lung (Hsinchu, TW), Hsu; Fu-Chieh (Hsinchu, TW)

Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.

International Classification: H01L 29/73 (20060101)

Expiration Date: 2018-10-26 0:00:00