The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2001
Filed:
Dec. 28, 1998
Hyundai Electronics Industries Co., Ltd., Yicheon, KR;
Abstract
An anti-fuse for programming a redundancy cell and a repair circuit having a programming apparatus are disclosed. The circuit includes a half power voltage supplier for supplying a half power voltage, a programming voltage supplier for supplying a programming voltage for exchanging a defective cell of the memory cell array with a redundancy cell, a ground voltage supplier for supplying a ground electric potential in response to an address signal of the memory cell, an anti-fuse for receiving a voltage of the half power voltage supplier and charging the same in the normal operation and breaking a dielectric film in accordance with a voltage difference between the programming voltage supplier and the ground voltage supplier during the programming operation for thereby implementing a programming, and an output unit for outputting an output signal based on the programmed state of the anti-fuse in accordance with a voltage applied from a node commonly connected with the half power voltage supplier, the programming voltage supplier, and the anti-fuse, for thereby enhancing a fabrication yield and reliability of a memory apparatus by easily exchanging a defective cell with a redundancy cell using a threshold voltage of a dielectric film without using an expensive laser apparatus.