Non-volatile memory with linear estimation of initial...

Details Non-volatile memory with linear estimation of initial... Non-volatile memory with linear estimation of initial...

2006-09-12

2009-10-06

Ho, Hoai V (Department: 2827)

Static information storage and retrieval

Floating gate

Particular biasing

C365S185180, C365S185240, C365S185290, C365S185260, C365S185330

Reexamination Certificate

active

07599223

ABSTRACT:
In a non-volatile memory, a selected page on a word line is successively programmed by a series of voltage pulses of a staircase waveform with verifications in between the pulses until the page is verified to a designated pattern. The programming voltage at the time the page is programmed verified will be to estimate the initial value of a starting programming voltage for the page. The estimation is further refined by using the estimate from a first pass in a second pass. Also, when the test is over multiple blocks, sampling of word lines based on similar geometrical locations of the blocks can yield a starting programming voltage optimized for faster programming pages.

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