US Patent 9858985 Dual port SRAM cell

An SRAM cell includes first and second inverters which are cross-coupled to one another to establish first and second data storage nodes, which are complementary. A first access transistor includes a first source/drain region coupled to the first data storage node, a first drain/source region coupled to a first bitline, and a first gate region coupled to a wordline. A second access transistor includes a second source/drain region coupled to the second complementary data storage node, a second drain/source region coupled to a second bitline, and a second gate region coupled to the wordline. A first dummy transistor has a first dummy source/drain region coupled to the first source/drain region of the first access transistor. A second dummy transistor has a second dummy source/drain region coupled to the second source/drain region of the second access transistor.