The parasitic diode contact in the bottom gate thin-film transistor (TFT) s
tatic random access memory (SRAM) cell limits its high node charging curren
t. The charging of 15 fF load capacitor to 0.1-0.2 V below V-cc takes about
0.65 ms. This adverse effect is circumvented in the metal contact TFT SRAM
cell, whose charging to full V-cc is seven times faster.