Electrical fuse programming control circuit

• US 20040012070A1
• Filed: 12/30/2002
• Published: 01/22/2004
• Est. Priority Date: 07/18/2002
• Status: Active Grant

• Current Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Original Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Inventors: Park, Jong Tai
• Granted Patent: US 6,842,065 B2
• Time in Patent Office: Days
• US Class Current: 257/529
• CPC Class Codes: G11C 17/18 Auxiliary circuits, e.g. for writing into memory
• CPC Class Codes: G11C 29/785 with redundancy programming schemes

Abstract

An electrical fuse programming control circuit includes a plurality of fuse blocks having a plurality of electrical fuses and an end fuse block. When all of the fuse blocks are programmed, the end fuse block is enabled and generates a programming control signal. The electrical fuse programming control circuit also includes a comparing unit that selectively transmits a fuse cutting signal to the plurality of fuse blocks in response to the programming control signal from the end fuse block. When programming of all of the fuse blocks is complete, reprogramming of the fuse blocks is not performed when an illegal program command is provided as an input.

Claims

1. An electrical fuse programming control circuit, comprising:

a plurality of fuse blocks having a plurality of electrical fuses, wherein each of the plurality of fuse blocks is selected in response to a plurality of fuse block select signals, and wherein each of the plurality of fuse blocks is programmed in response to a fuse cutting signal;

an end fuse block that is enabled in response to an end control signal, wherein the end control signal is enabled when all of the fuse blocks are programmed, and wherein the end fuse block is adapted to generate a programming control signal in response to the fuse cutting signal; and

a comparing unit adapted to selectively transmit the fuse cutting signal to the plurality of fuse blocks in response to the programming control signal.

2. The electrical fuse programming control circuit according to claim 1, wherein the plurality of fuse block select signals includes repair addresses.

3. The electrical fuse programming control circuit according to claim 2, wherein the end control signal includes at least one address that is different from the repair addresses.

4. The electrical fuse programming control circuit according to claim 2, wherein the end control signal includes at least one command that is different from a command for performing a repair operation.

5. The electrical fuse programming control circuit according to claim 1, wherein the plurality of fuse block select signals includes a plurality of trimming control signals for voltage level trimming.

6. The electrical fuse programming control circuit according to claim 5, wherein the end control signal includes at least one control signal that is different from the plurality of trimming control signals.

7. The electrical fuse programming control circuit according to claim 5, wherein the end control signal is at least one command that is different from a command for performing a voltage level trimming operation.

8. An electrical fuse programming control circuit, comprising:

a plurality of fuse blocks having a plurality of electrical fuses, wherein each of the plurality of fuse blocks is selected in response to a plurality of fuse block select signals, and wherein each of the plurality of fuse blocks is programmed in response to a fuse cutting signal;

an end fuse block that is enabled in response to an end control signal, wherein the end control signal is enabled when all of the fuse blocks are programmed, and wherein the end fuse block is adapted to generate a programming control signal in response to the fuse cutting signal; and

a fuse cutting signal generating unit adapted to selectively generate the fuse cutting signal in response to the programming control signal.

9. The electrical fuse programming control circuit according to claim 8, wherein the plurality of fuse block select signals includes repair addresses.

10. The electrical fuse programming control circuit according to claim 9, wherein the end control signal includes at least one address that is different from the repair addresses.

11. The electrical fuse programming control circuit according to claim 9, wherein the end control signal includes at least one command that is different from a command for performing a repair operation.

12. The electrical fuse programming control circuit according to claim 8, wherein the plurality of fuse block select signals includes a plurality of trimming control signals for voltage level trimming.

13. The electrical fuse programming control circuit according to claim 12, wherein the end control signal includes at least one control signal that is different from the plurality of trimming control signals.

14. The electrical fuse programming control circuit according to claim 12, wherein the end control signal includes at least one command that is different from a command for performing a voltage level trimming operation.