Empire Technology Development LLC

Mitsubishi Tanabe Pharma Corporation

Glitter Technology Llp

Hiroshi Iwasaki

Minoru Tanaka

Hiroko Suzuki

Akira Nakao

Tomofumi Setsuta

Maki Seki

Ryo Tatsumi

The invention provides a homocysteine synthase inhibitor useful for the prophylaxis or treatment of diseases involving homocysteine synthase. The homocysteine synthase inhibitor is a compound of the formula (I) wherein each symbol is as defined herein, or a pharmacologically acceptable salt thereof, or a solvate thereof.

Homocysteine synthase inhibitor

The disclosure of this application enhances the data writing speed of an electrically erasable and writable semiconductor memory. In a semiconductor storage device of this application, at a time of writing data, when a positive voltage lower than a voltage at control gateis applied to potential control gateformed inside tunnel oxide filmbetween p channelof a transistor and floating gate, a potential barrier between p channelof the transistor and floating gateis lowered, and a time required for storing an electron in floating gateis reduced. After data is stored, when 0 V or a negative voltage is applied to the potential control gate, a potential barrier for an electron moving from the floating gate to the channel of the transistor increases, thereby preventing erasure of data.

Semiconductor storage device and method of manufacturing same

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Osaka, Japan

Hiroshi Iwasaki