Memory chip erasing method
A memory chip and storage unit technology, applied in static memory, read-only memory, information storage, etc., can solve the problems of shortening erasing time and long erasing method, and achieve shortening erasing time, reliability assurance, and ease of use. effect achieved
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0028] The method for erasing a memory chip proposed by the present invention, its basic idea is all aimed at a bit line (Bit line) when erasing verification, soft programming and soft programming verification, and the common source of the memory chip is grounded. Connecting to the current limiting device specifically includes: pre-programming the blocks in the memory cells; erasing all the memory cells; verifying the memory cells after erasing; and performing soft programming verification in units of bit lines.
[0029] In order to damage the unit and circuit due to the excessive current flowing through the memory cell during erasing verification and soft programming verification, a current limiting device is added to the...
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