Non-volatile storage system with initial programming voltage based on trial
View Patent ↗A trial programming process is performed for a first set of one or more non-volatile storage elements to test usage of the non-volatile storage system. Based on this trial programming, a programming signal is calibrated by adjusting its initial magnitude. The calibrated programming signal is then used to program a second set of non-volatile storage elements (which may or may not include the first set).
1. A method for programming non-volatile storage, comprising:
applying a common programming stimulus to a first set of one or more non-volatile storage elements;
observing behavior of the first set of one or more non-volatile storage elements in response to the common programming stimulus;
determining and setting an initial magnitude of a programming signal based on and in response to the observed behavior of the first set of one or more non-volatile storage elements; and
programming a second set of non-volatile storage elements using the program signal with the initial magnitude.
2. The method of claim 1 , wherein:
the programming signal includes a set of pulses; and
the initial magnitude of the programming signal is the magnitude of the first pulse of the set of pulses.
3. The method of claim 1 , wherein:
the applying a common programming stimulus includes performing at least partial programming on the first set of one or more non-volatile storage elements.
4. The method of claim 1 , wherein:
the first set of one or more non-volatile storage elements includes multiple non-volatile storage elements; and
the initial magnitude is set based on an average of performance data for the first set of one or more non-volatile storage elements.
5. The method of claim 1 , wherein:
the first set of one or more non-volatile storage elements includes multiple non-volatile storage elements; and
the initial magnitude is set based on a mathematical function of performance data for the first set of one or more non-volatile storage elements.
6. The method of claim 1 , wherein:
the first set of one or more non-volatile storage elements are connected to the second set of one or more non-volatile storage elements.
7. The method of claim 1 , wherein:
the first set of one or more non-volatile storage elements and the second set of one or more non-volatile storage elements are connected to a common word line, the common programming stimulus is applied to the common word line.
8. The method of claim 1 , wherein:
the second set of one or more non-volatile storage elements are connected to a selected word line and are in a particular block; and
the first set of one or more non-volatile storage elements are in the particular block and are connected to a first word line for the particular block.
9. The method of claim 1 , wherein:
the programming the second set of non-volatile storage elements also programs the first set of non-volatile storage elements.
10. The method of claim 1 , wherein:
the second set of non-volatile storage elements includes the first set of non-volatile storage elements.
11. The method of claim 1 , wherein:
the applying a common programming stimulus to the first set of one or more non-volatile storage elements includes applying a common control gate voltage signal to the first set of one or more non-volatile storage elements.
12. A method for programming non-volatile storage, comprising:
performing at least partial programming on a first set of one or more non-volatile storage elements;
observing behavior of the first set of one or more non-volatile storage elements in response to the performing at least partial programming;
determining and setting an initial magnitude of programming signal based on and in response to the observed behavior of multiple non-volatile storage elements of the first set of one or more non-volatile storage elements; and
programming a second set of non-volatile storage elements using the programming signal with the initial magnitude.
13. The method of claim 12 , wherein:
the programming signal includes a set of pulses;
the initial magnitude of the programming signal is the magnitude of the first pulse of the set of pulses.
14. The method of claim 12 , wherein:
the performing at least partial programming on the first set of one or more non-volatile storage elements includes applying a common programming stimulus to control gates of the first set of one or more non-volatile storage elements.
15. The method of claim 12 , wherein:
the first set of one or more non-volatile storage elements includes multiple non-volatile storage elements; and
the initial magnitude is set based on a mathematical function of performance data for the first set of one or more non-volatile storage elements.
16. The method of claim 12 , wherein:
the second set of non-volatile storage elements includes the first set of non-volatile storage elements and additional non-volatile storage elements.
17. The method of claim 12 , wherein:
the second set of non-volatile storage elements includes the first set of non-volatile storage elements.
18. The method of claim 12 , wherein:
the first set of one or more non-volatile storage elements and the second set of one or more non-volatile storage elements are connected to a common word line, the program signal is applied to the common word line, the performing at least partial programming includes applying a voltage signal to the common word line, the first set of one or more non-volatile storage elements are at least partially programmed in response to the voltage signal.
19. A non-volatile storage system, comprising:
a plurality of non-volatile storage elements; and
one or more managing circuits in communication with the plurality of non-volatile storage elements, the one or more managing circuits apply a common programming stimulus to a first set of the non-volatile storage elements and observe behavior of the first set of the non-volatile storage elements in response to the common programming stimulus, the one or more managing circuits determine and set an initial magnitude of a programming signal based on and in response to the observed behavior of the first set of the non-volatile storage elements, the one or more managing circuits program a second set of the non-volatile storage elements using the programming signal with the initial magnitude.
20. The A non-volatile storage system of claim 19 , wherein:
the programming signal includes a set of pulses; and
the initial magnitude of the programming signal is the magnitude of the first pulse of the set of pulses.
21. The A non-volatile storage system of claim 19 , wherein:
the one or more managing circuits apply a common programming stimulus by applying a common series of pulses to control gates of the first set of the non-volatile storage elements.
22. The A non-volatile storage system of claim 19 , wherein:
the one or more managing circuits set the initial magnitude based on a mathematical function of performance data for the first set of the non-volatile storage elements.
23. The A non-volatile storage system of claim 19 , further comprising:
a first word line, the first set of the non-volatile storage elements and the second set of the non-volatile storage elements are connected to the first word line.
24. The A non-volatile storage system of claim 19 , wherein:
the second set of the non-volatile storage elements includes the first set of the non-volatile storage elements.
25. A non-volatile storage system, comprising:
a plurality of non-volatile storage elements; and
one or more managing circuits in communication with the plurality of non-volatile storage elements, the one or more managing circuits perform at least partial programming on a first set of the non-volatile storage elements and observe behavior of the first set of the non-volatile storage elements in response to the performing of at least partial programming, the one or more managing circuits determine and set an initial magnitude of a programming signal based on and in response to the observed behavior of multiple non-volatile storage elements of the first set of the non-volatile storage elements, the one or more managing circuits program a second set of the non-volatile storage elements using the programming signal with the initial magnitude.
26. The A non-volatile storage system of claim 25 , wherein:
the performing at least partial programming on the first set of the more non-volatile storage elements includes applying a common programming stimulus to control gates of the first set of the non-volatile storage elements.
27. The A non-volatile storage system of claim 26 , wherein:
the programming signal includes a set of pulses; and
the initial magnitude of the programming signal is the magnitude of the first pulse of the set of pulses.
28. The A non-volatile storage system of claim 27 , wherein:
the one or more managing circuits set the initial magnitude based on a mathematical function of performance data for the first set of the non-volatile storage elements.