摘要:
An MOS device has a stack (40) and a passivation layer (45) covering the stack. The stack (40) is formed by a first polysilicon region (34) and by a second polysili con region (36) arranged on top of one another and separated by an intermediate dielectric region (35). An electrical connection region (53a), formed by a column structure substantially free of steps, extends through the passivation layer (45), the second polysilicon region (36) and the intermediate dielectric region (35), and terminates in contact with the first polysilicon region (34) so as to electrically contacting the first polysilicon region and the second polysilicon region. Fabrication of the electr ical connection region (53a) requires just one mask.
摘要:
Improved dimensional accuracy of the gate electrode structure in the peripheral circuitry region of a semiconductor device is achieved by reducing ARC loss during photoresist stripping associated with plural mask formation in the core memory cell region during patterning and ion implantations. Embodiments include sequentially etching the stacked gate electrode structure in the core memory cell region, photoresist stripping and etching to form the gate electrode structure in the peripheral circuitry region. Subsequently, plural maskings and ion implantations are implemented in the core memory cell region with attendant photoresist strippings.
摘要:
An oxide-containing layer (18) is formed directly on a semiconductor layer (12) in an NVM region (14), and a first partial layer (20) of a first material is formed over the oxide-containing layer in the NVM region. A first high-K dielectric layer (22) is formed directly on the semiconductor layer in a logic region (16). A first conductive layer (24) is formed over the first dielectric layer in the logic region. A second partial layer (26) of the first material is formed directly on the first partial layer in the NVM region and over the first conductive layer in the logic region. A logic device is formed in the logic region. An NVM cell is formed in the NVM region, wherein the first and second partial layer together are used to form one of a charge storage layer (28) if the cell is a floating gate cell or a select gate (28) if the cell is a split gate cell.
摘要:
An oxide-containing layer (18) is formed directly on a semiconductor layer (12) in an NVM region (14), and a first partial layer (20) of a first material is formed over the oxide-containing layer in the NVM region. A first high-K dielectric layer (22) is formed directly on the semiconductor layer in a logic region (16). A first conductive layer (24) is formed over the first dielectric layer in the logic region. A second partial layer (26) of the first material is formed directly on the first partial layer in the NVM region and over the first conductive layer in the logic region. A logic device is formed in the logic region. An NVM cell is formed in the NVM region, wherein the first and second partial layer together are used to form one of a charge storage layer (28) if the cell is a floating gate cell or a select gate (28) if the cell is a split gate cell.
摘要:
A first conductive layer (30) and an underlying charge storage layer (20) are patterned to form a control gate (32) in an NVM region (12). A first dielectric layer (34) and barrier layer (35) are formed over the control gate. A sacrificial layer (36) is formed over the barrier layer and planarized. A first patterned masking layer (38) in the NVM region defines a select gate location laterally adjacent the control gate in the NVM region. A second masking layer (38) defines a logic gate location in the logic region (14). Exposed portions of the sacrificial layer are removed such that a first portion remains at the select gate location and a second portion remains at the logic gate location. A second dielectric layer (52) is formed over, and planarized to expose, the first and second portions. The first and second portions are removed to result in openings at the select gate location and at the logic gate location which expose the barrier layer.
摘要:
Improved dimensional accuracy of the gate electrode structure in the peripheral circuitry region of a semiconductor device is achieved by reducing ARC loss during photoresist stripping associated with plural mask formation in the core memory cell region during patterning and ion implantations. Embodiments include sequentially etching the stacked gate electrode structure in the core memory cell region, photoresist stripping and etching to form the gate electrode structure in the peripheral circuitry region. Subsequently, plural maskings and ion implantations are implemented in the core memory cell region with attendant photoresist strippings.
摘要:
An electrically erasable and programmable non-volatile memory cell (205) integrated in a chip of semiconductor material (300) is proposed. The memory cell includes a floating gate MOS transistor (210m) having a source region (335) and a drain region (325) formed in a first well (315), a channel (340) being defined between the drain region and the source region during operation of the memory cell, a control gate region (350), and a floating gate (355) extending over the channel and the control gate region, and a bipolar transistor (215) for injecting an electric charge into the floating gate, the bipolar transistor having an emitter region (365) formed in the first well, a base region consisting of the first well, and a collector region consisting of the channel, wherein the memory cell further includes a second well (320) insulated from the first well, the control gate region being formed in the second well.
摘要:
A electrically erasable and programmable read only memory device has a memory cell array implemented by a plurality of floating gate type memory transistors, and each of the floating gate type memory transistors is implemented by a thin film field effect transistor with a floating gate electrode (16) formed over a relatively thick insulating film (13) covering a major surface of a semiconductor substrate (12) so that the biasing conditions and crystal defects do not have any influence on the floating gate type memory transistor.