METHOD FOR SHIELDING MAIN BIT LINE FOR REFERENCE CELL
摘要
<p>A dummy main bit line (MBLD1) is arranged between a reference main bit line (MBLR1) and a core main bit line group (MBL1 to MBLj). A selection transistor (SLD1) provided between a sub bit line (BLD1) connected to a cell (31), and the main bit line (MBLD1) can be switched between a conductive state and a non-conductive state, independently from other selection transistors. The dummy main bit line (MBLD1) can be set to a ground potential by a shield grounding means (DTD1, 106) and can be used as a shield line for the reference main bit line (MBLR1).</p>
