Patent ID: 6570264
Filing Date: 2003-05-27
Classification: H01L,Y10S

Abstract:
A semiconductor memory device, comprising:a memory cell that includes a first driver transistor, a second driver transistor, a first load transistor, a second load transistor, a first transfer transistor and a second transfer transistor; a first drainâ€”drain connection layer; and a second drainâ€”drain connection layer, wherein the first drainâ€”drain connection layer connects a drain region of the first driver transistor and a drain region of the first load transistor, the second drainâ€”drain connection layer connects a drain region of the second driver transistor and a drain region of the second load transistor, each of the first drainâ€”drain connection layer and the second drainâ€”drain connection layer includes a first contact end section, a second contact end section, a linear section and an extension section, the first contact end section of the first drainâ€”drain connection layer is a portion that connects to the drain region of the first driver transistor, the second contact end section of the first drainâ€”drain connection layer is a portion that connects to the drain region of the first load transistor, the linear section of the first drainâ€”drain connection layer is a portion that linearly extends from the first contact end section of the first drainâ€”drain connection layer and reaches the second contact end section of the first drainâ€”drain connection layer, the extension section of the first drainâ€”drain connection layer is a portion that extends from the second contact end section of the first drainâ€”drain connection layer in a direction toward a location where the second drainâ€”drain connection layer is located, the first contact end section of the second drainâ€”drain connection layer is a portion that connects to the drain region of the second driver transistor, the second contact end section of the second drainâ€”drain connection layer is a portion that connects to the drain region of the second load transistor, the linear section of the second drainâ€”drain connection layer is a portion that linearly extends from the first contact end section of the second drainâ€”drain connection layer and reaches the second contact end section of the second drainâ€”drain connection layer, and the extension section of the second drainâ€”drain connection layer is a portion that extends from the second contact end section of the second drainâ€”drain connection layer in a direction toward a location where the first drainâ€”drain connection layer is located.