Birch, Stewart, Kolasch & Birch, LLP
Semiconductor storage device, method for protecting predetermined memory element and portable electronic equipment
There is provided a semiconductor storage device and portable electronic equipment including a nonvolatile memory element that can easily be miniaturized. The semiconductor storage device includes a memory cell array 21 in which a plurality of memory elements 1 are arranged and a write state machine 32. The memory element 1 includes a gate electrode 104 formed on a semiconductor layer 102 via a gate insulator 103, a channel region arranged below the gate electrode 104, diffusion regions 107a, 107b that are located on both sides of the channel region and have a conductive type opposite to that of the channel region and memory function bodies 109 that are located on both sides of the gate electrode 104 and have a function to retain electric charge. The write state machine 32 can selectively prevent program and erase of data in the memory elements within a predetermined range.
Sharp Kabushiki Kaisha
G B G G H G H G H H H
G11C B82Y G11C G11C H01L G11C H01L G11C H01L H01L H01L
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Hiroshi Akihide Yoshinao Masaru Yoshifumi Yasuaki
Iwata Shibata Morikawa Nawaki Yaoi Iwase