Abstract:
A one-time-programmable-read-only-memory (OTPROM) is implemented in a two-dimensional array of aggressively scaled silicide migratable e-fuse. Word line (WL) selection is performed by decoding logic (140) at Vdd while the bit line drive is switched between Vdd and a higher voltage, Vp, for programming. The OTPROM is thus compatible with and can be integrated with other technologies without a cost adder and supports optimization of the high current patch for minimal voltage drop during fuse programming. A differential sense amplifier (120) with a programmable reference (130) is used for improved sense margins and can support an entire bit line rather than sense amplifiers (120) being provided for individual fuses.
Abstract:
An antifuse (100) having a link (125) including a region (150) of unsilicided semiconductor material may be programmed at reduced voltage and current and with reduced generation of heat by electromigration of metal or silicide from a cathode (120) into the region of unsilicided semiconductor material to form an alloy having reduced bulk resistance. The cathode (120) and anode (110) are preferably shaped to control regions from which and to which material is electrically migrated After programming, additional electromigration of material can return the antifuse to a high resistance state. The process by which the antifuse is fabricated is completely compatible with fabrication of field effect transistors and the antifuse may be advantageously formed on isolation structures
Abstract:
A one-time-programmable-read-only-memory (OTPROM) is implemented in a two-dimensional array of aggressively scaled silicide migratable e-fuse. Word line (WL) selection is performed by decoding logic (140) at Vdd while the bit line drive is switched between Vdd and a higher voltage, Vp, for programming. The OTPROM is thus compatible with and can be integrated with other technologies without a cost adder and supports optimization of the high current patch for minimal voltage drop during fuse programming. A differential sense amplifier (120) with a programmable reference (130) is used for improved sense margins and can support an entire bit line rather than sense amplifiers (120) being provided for individual fuses.
Abstract:
A semiconductor structure and a method for fabricating the semiconductor structure provide a field effect device located and formed upon an active region of a semiconductor substrate and at least one of a fuse structure, an anti-fuse structure and a resistor structure located and formed at least in part simultaneously upon an isolation region laterally separated from the active region within the semiconductor substrate. The field effect device includes a gate dielectric comprising a high dielectric constant dielectric material and a gate electrode comprising a metal material. The at least one of the fuse structure, anti-fuse structure and resistor structure includes a pad dielectric comprising the same material as the gate dielectric, and optionally, also a fuse, anti-fuse or resistor that may comprise the same metal material as the gate electrode.