Fuse programming schemes for robust yield
View Patent ↗A program circuit generates first and second currents to program the fuse. The second current is higher than the first current. A control circuit controls generating the first and second currents in succession.
1. A method comprising:
applying a fuse program voltage to a first end of a fuse;
generating a first current provided by one or more program devices connected to a second end of the fuse for a first time period with an intention to program the fuse; and
generating a second current higher than the first current by the one or more program devices for a second time period with an intention to program the fuse.
2. The method of claim 1 further comprising:
determining if the first current successfully programs the fuse before generating the second current.
3. The method of claim 1 further comprising:
determining if the second current successfully programs the fuse after generating the second current.
4. The method of claim 1 wherein generating the first current comprises:
generating a first program enable signal to turn on the one or more program devices.
5. The method of claim 1 wherein generating the second current comprises:
generating a second program enable signal to turn on the one or more program devices.
6. A method comprising:
applying a first fuse program voltage to a first end of a fuse;
generating a first current provided by one or more program devices connected to a second end of the fuse for a first time period with an intention to program the fuse;
applying a second fuse program voltage to the first end of the fuse; and
generating a second current higher than the first current by the one or more program devices for a second time period with an intention to program the fuse.
7. The method of claim 6 further comprising:
determining if the first current successfully programs the fuse before applying the second fuse program voltage.
8. The method of claim 6 further comprising:
determining if the second current successfully programs the fuse after generating the second current.
9. The method of claim 6 wherein generating the first current comprises:
generating a first program enable signal to turn on the one or more program devices.
10. The method of claim 9 wherein generating the second current comprises:
generating a second program enable signal to turn on the one or more program devices.
11. The method of claim 10 wherein the first and second program enable signals are the same.