A novel metal-insulator-metal (MIM) structure has been developed for use in field-programmable gate arrays (FPGAs) as a voltage-programmable link (VPL). The present structure relies on a combination of a refractory metal and aluminum as the lower electrode, and aluminum alone as the top electrode. The insulator, prepared by means of plasma-enhanced chemical vapor deposition, comprises a sandwich of nearly stoichiometric silicon dioxide interposed between two layers of silicon-rich silicon nitride. This MIM structure has displayed characteristics desirable for use in the emerging FPGA technology.<
Published in:
Electron Device Letters, IEEE
(Volume:13
,
Issue:
9
)
Date of Publication: Sept. 1992