Patent ID: 7791933
Filing Date: 2010-09-07
Classification: G11C

Abstract:
1. A machine readable storage medium embodying a design structure for a device including a write control system configured to write data on phase change element (PCE) cells during a write cycle, the design structure comprising: first data representing an array of phase change element (PCE) cells each including a variable resistor, and a plurality of devices providing independent control of a row access and a column access to the PCRAM; second data representing a voltage source coupled to the PCRAM; and third data representing an integrated circuit (IC) directing, during a write cycle, the voltage source to pre-charge a column line to a predetermined level and subsequently enabling, during said write cycle, a current flow to a corresponding selected phase change element to write data into said PCE cells, wherein a machine reading the design structure causes the IC to initiate a current flow in the phase change element with a row line (word line) once the column line (bit line) has been pre-charged to write data to the PCRAM cell during said write cycle, and the machine reading the design structure causes the IC to terminate the current flow in the phase change element by disconnecting the column line during said write cycle.