发明授权
US6094369A Ferroelectric nonvolatile memory element having capacitors of same dielectric constant and method thereof 失效
具有相同介电常数的电容器的铁电非易失性存储元件及其方法

Ferroelectric nonvolatile memory element having capacitors of same
dielectric constant and method thereof
摘要:
A nonvolatile memory element capable of using desired ferroelectric materials, exhibiting a high reliability and performing processings such as reading of information without destruction of stored contents is provided. A memory cell comprises two capacitors Cf1 and Cf2 connected to each other in series. Both capacitors are ferroelectric capacitors manufactured by the same steps. Accordingly, the coupling ratio between both capacitors can be changed by only the change of surface areas thereof. A voltage corresponding to the information to be stored is applied to the opposite ends of the memory cell 20 to cause polarization reversal and as a result, the information is written thereinto. In order to read the stored information, a ground potential is applied to the opposite ends of the memory cell 20. On the basis of the potential generated at a connection 20c upon the application of the ground potential, the information can be read.
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