Patent ID: 8908419
Filing Date: 2014-12-09
Classification: G11C,H01L,Y10S

Abstract:
1. A method of fabricating a semiconductor device comprising at least two memory cells, wherein the at least two memory cells have first and second memory cells, each containing six transistors, which are two access transistors, two drive transistors, and two load transistors, comprising: forming a first poly-silicon wiring layer, a first part of which is structured as a gate of a first access transistor of the first memory cell, and a second part of which is structured as a gate of a second access transistor of the second memory cell; forming a second poly-silicon wiring layer, a first part of which is structured as a gate of a first drive transistor of the first memory cell, and a second part of which is structured as a gate of a first load transistor of the first memory cell; forming a third poly-silicon wiring layer, a first part of which is structured as a gate of a second load transistor of the first memory cell, and a second part of which is structured as a gate of a second drive transistor of the first memory cell; forming a fourth poly-silicon wiring layer, a first part of which is structured as a gate of a second access transistor of the first memory cell; forming a fifth poly-silicon wiring layer, a first part of which is structured as a gate of a first drive transistor of the second memory cell, and a second part of which is structured as a gate of a first load transistor of the second memory cell; forming a sixth poly-silicon wiring layer, a first part of which is structured as a gate of a second load transistor of the second memory cell, and a second part of which is structured as a gate of a second drive transistor of the second memory cell; forming a seventh poly-silicon wiring layer, a first part of which is structured as a gate of a second access transistor of the second memory cell, wherein steps of forming the first, second, third, fourth, fifth, sixth, and seventh poly-silicon wiring layers comprise: