摘要:
A method for forming a non-volatile memory (NVM) device, the method including forming two diffusion areas in a substrate, sad diffusion areas forming a channel therebetween, said channel being adapted to permit movement of primary electrons to at least one of the diffusion areas, forming a non-conducting charge trapping layer at least over the channel, and managing at least one of movement of secondary electrons from the substrate towards the charge trapping layer and a punch-through voltage in the substrate by controlling a position of a concentration of an electron acceptor dopant in the substrate.
摘要:
A method for protecting a non-volatile memory device, the method including forming a non-volatile memory device including a polycide structure formed over a non-conducting charge trapping layer, and forming a protective layer over at least a portion of the polycide structure, the protective layer being adapted to absorb electromagnetic wave energy having a wavelength shorter than visible light. A device constructed in accordance with the method is also disclosed.
摘要:
A method for erasing a non-volatile memory cell array, the method including applying an erase pulse to at least one bit of at least one memory cell of the array, erase verifying the at least one bit with a first erase verify level, and if the bit has passed the first erase verify level, applying at least one more erase pulse to the at least one bit.
摘要:
An architecture and method for implementing a non-strobed operation on an array cell within a memory array in which a reference unit is provided for emulating the response of an array cell during a desired operation, for example, a read, program verify, erase verify or other types of read operations. The reference unit includes a reference cell which is driven by a non-strobed gate voltage. The architecture and method permit relatively noise-free array cell interrogations at close to ground voltage levels.
摘要:
A method for programming a reference cell of a memory array includes the steps of programming the reference cell with large programming steps until a threshold voltage level of the reference cell is above an interim target level and programming said reference cell with small programming steps until the threshold voltage level is above a final target level.
摘要:
A nitride programmable read only memory (NROM) cell with a pocket implant (120) self-aligned to at least one bit line junction (102, 104). Alternatively, the bit line junction(s) (102, 104) can have a thin area of effective programming and erasing located nearby. Further alternatively, the channel (100) can have a threshold voltage level implant which has a low voltage level in a central area of the channel (100) and which has a peak of high voltage level near at least one of the bit line junctions (102, 104). With one pocket implant, the NROM cell stores one bit. With two pocket implants, the NROM cell stores two bits.
摘要:
A method of fabricating a nitride read only memory (NROM) chip creates an oxide-nitride-oxide (ONO) layer (18, 17, 20) on a substrate and etches the ONO layer within the memory portion of the chip into columns. Bit lines (12) are implanted between columns after which bit line oxides (50) are generated on top of the bit lines with the thickness of the bit line oxides being independent of the thickness of the bottom oxide. The thickness of a gate oxide layer in a periphery portion of the chip is also relatively independent of the thicknesses of the other oxides. Finally, rows of polysilicon or polysilicide (60) are formed perpendicular to and on top of the bit line oxides and the ONO columns.
摘要:
A protection device which is active during the manufacturing process of a semiconductor chip includes a protection transistor (52) and an antenna (55). The protection transistor is connected between a metal line (40) having devices to be protected electrically connected thereto and a ground supply (41), where the metal line is connected to devices (50) to be protected. The antenna is formed of the same metal layer as the metal line and controls the operation of the protection transistor during the manufacturing process. The antenna (55) is connected to a gate (G) of the protection transistor. Optionally, there is a metal ring (112, Fig. 7) around the antenna which is connected to a drain (D) of the protection transistor via the same metal layer as the metal line. During normal operation of the chip, the protection transistor is either active for other purposes or is turned off. Turning off is provided either by a line formed of a second metal layer that is connected between the antenna and ground, or by a reversed biased diode (118) and a parallel capacitor (120) that are connected between the gate of the protection transistor and ground. The present invention includes the method of manufacturing the protection device.