Abstract:
An optical film includes a first compensation film and a second compensation film having a retardation for incident light different from the first compensation film, wherein the first compensation film includes a first liquid crystal layer including liquid crystals which are obliquely tilted relative to a surface of the first compensation film, and the second compensation film has a refractive index satisfying Relationship Equation 1 and Relationship Equation 2. nz2>nx2 Relationship Equation 1 nz2>ny2 Relationship Equation 2
Abstract:
Provided are a separator including carboxyl-group-containing cellulose nanofibers and a porous film having a tensile strength of about 60 MPa or greater, an electrochemical cell including the separator, a method of preparing the separator, and non-woven fabric.
Abstract:
A programming method of a nonvolatile memory device including; programming data in memory cells connected to a word line by performing a coarse program operation; and programming the data in the memory cells by performing a fine program operation, wherein the number of program states in the coarse program operation is changed according to a program/erase (P/E) cycle number.
Abstract:
A word line driving method is for a nonvolatile memory device including a plurality of memory blocks having a plurality of strings which is formed in a direction perpendicular to a substrate and connected between bit lines and a common source line. The method includes applying an offset pulse to a word line for a predetermined time to shorten a word line setting time, and applying a target pulse having a level which is higher or lower than a level of the offset pulse to the word line after the predetermined time.
Abstract:
Systems and methods of sequentially accessing memory cells in a nonvolatile memory device (NVM) are provided. The NVM has a plurality of strings and a common signal line coupled to the plurality of strings. Each string includes a plurality of memory cells and a selection transistor coupled between the plurality of memory cells and the common signal line. A command that accesses multiple memory cells is received, a voltage is applied to a first selection transistor of a first string to electrically connect the common signal line to the first string, a pulse is applied for a predetermined time period to selection transistors of other strings, and memory cells of the first string are accessed. Advantages such as removal of boosting charges from unselected strings prior to sequentially accessing memory cells from selected strings can improve performance and reliability of NVM-based systems.
Abstract:
A write method of a storage device includes determining whether to perform a coarse program operation based on information about memory cells of a memory device, in response to a determination that the coarse program operation is to be performed, programming data in the memory device by performing the coarse program operation and a fine program operation, and in response to a determination that the coarse program operation is not to be performed, programming data in the memory device by performing the fine program operation.
Abstract:
Methods of operating memory systems and nonvolatile memory devices include performing error checking and correction (ECC) operations on M pages of data read from a first “source” portion of M-bit nonvolatile memory cells within the nonvolatile memory device to thereby generate M pages of ECC-processed data, where M is a positive integer greater than two (2). A second “target” portion of M-bit nonvolatile memory cells within the nonvolatile memory device is then programmed with the M pages of ECC-processed data using an address-scrambled reprogramming technique, for example.
Abstract:
An operating method for a non-volatile memory device includes applying first and second read voltages to a first word line to perform a read operation; counting first memory cells each having a threshold voltage belonging to a first voltage range between the first read voltage and the second read voltage; applying a third read voltage to the first word line sequentially after applying the second read voltage to count second memory cells each having a second threshold voltage belonging to a voltage range between the second read voltage and the third read voltage; comparing the number of first memory cells counted and the number of second memory cells counted; determining a fourth read voltage based on a result of the comparing; and applying the fourth read voltage to the first word line sequentially after applying the third read voltage.
Abstract:
A nonvolatile memory device includes a flag cell configured to store flag information, a plurality of dummy cells adjacent to the flag cell, and program control logic configured to control a program operation on the flag cell and a dummy program operation on the plurality of dummy cells. When the program operation on the flag cell is performed, the program control logic performs the dummy program operation on at least one of the plurality of dummy cells.
Abstract:
A nonvolatile memory device includes a memory cell array including a plurality of memory cells, a page buffer circuit connected with the memory cell array via a plurality of bit lines and configured to selectively pre-charge the plurality of bit lines, and control logic configured to control the page buffer circuit such that a pre-charge voltage is applied to selected bit lines of the plurality of bit lines during a first time at a read operation and such that a pre-charge voltage is applied to selected bit lines of the plurality of bit lines during a second time different from the first time at a verification read operation. The second time is determined on the basis of the number of selected bit lines of the plurality of bit lines at the verification read operation.