摘要:
A vertical transistor (10) has a substrate (12) and a control electrode conductive layer (18), which functions as a control or gate electrode. A sidewall dielectric layer (22) is formed laterally adjacent the control electrode conductive layer (18) and overlying the substrate (12). The conductive layer (18) at least partially surrounds a channel region (30). A vertical conductive region is formed within a device opening wherein a bottom portion of the conductive region is a first current electrode (28). A middle portion of the vertical conductive region is the channel region (30). A top portion of the vertical conductive region is a second current electrode (34).
摘要:
A method for forming a trench transistor structure begins by forming a buried layers (12 and 16) and a doped well (22) in a substrate (10) via epitaxial growth processing. A trench region (24) is then etched into the substrate (10) to expose a the layer (12). A conductive sidewall spacer (28) is formed within the trench (24) as a gate electrode. The spacer (28) gates a first transistor (12, 28, 32) located adjacent a first half of the trench (24) and a second transistor (12, 28, 34) located adjacent a second half of the trench (24). Region (12) is a common electrode wherein the channel regions of both the first and second transistor are coupled in a serial manner through the region (12).
摘要:
A method for forming a trench transistor structure begins by forming a buried layers (12 and 16) and a doped well (22) in a substrate (10) via epitaxial growth processing. A trench region (24) is then etched into the substrate (10) to expose a the layer (12). A conductive sidewall spacer (28) is formed within the trench (24) as a gate electrode. The spacer (28) gates a first transistor (12, 28, 32) located adjacent a first half of the trench (24) and a second transistor (12, 28, 34) located adjacent a second half of the trench (24). Region (12) is a common electrode wherein the channel regions of both the first and second transistor are coupled in a serial manner through the region (12).
摘要:
A memory circuit and method of formation uses a transmission gate (24) as a select gate. The transmission gate (24) contains a transistor (30) which is an N-channel transistor and a transistor (28) which is a P-channel transistor. The transistors (28 and 30) are electrically connected in parallel. The use of the transmission gate (24) as a select gate allows reads and writes to occur to a memory cell storage device (i.e. a capacitor (32), a floating gate (22), etc.) without a significant voltage drop occurring across the transmission gate. In addition, EEPROM technology is more compatible with EPROM/flash technology when using a transmission gate as a select gate within EEPROM devices.
摘要:
A memory circuit and method of formation uses a transmission gate (24) as a select gate. The transmission gate (24) contains a transistor (30) which is an N-channel transistor and a transistor (28) which is a P-channel transistor. The transistors (28 and 30) are electrically connected in parallel. The use of the transmission gate (24) as a select gate allows reads and writes to occur to a memory cell storage device (i.e. a capacitor (32), a floating gate (22), etc.) without a significant voltage drop occurring across the transmission gate. In addition, EEPROM technology is more compatible with EPROM/flash technology when using a transmission gate as a select gate within EEPROM devices.
摘要:
A split-gate EEPROM transistor includes a channel region (22) formed in a vertically disposed semiconductor body (58) and residing intermediate to a drain region (26) and a source region (24). A select gate electrode (28) is horizontally disposed on a semiconductor substrate (20). A floating gate electrode (30) resides adjacent to the channel region (22) and overlies the select gate electrode (28). A control gate electrode (32) resides adjacent to the control gate electrode (30) and also overlies the select gate electrode (28). In operation, the select gate electrode (28) regulates the flow of electrical charge from the source region (24) into the channel region (22), and provides a field plate electrical isolation for adjacent memory cells in an EEPROM array.
摘要:
A semiconductor dielectric (10) is formed by providing a base layer (12) having a surface. A thin interface layer (13) is formed at the surface of the base layer (12). The thin interface layer has a substantial concentration of both nitrogen and fluorine. A thermal oxide layer (14) is formed overlying the interface layer (13). A deposited dielectric layer (16) is formed overlying the thermal oxide layer (14). The deposited dielectric layer (16) is optionally densified by a thermal heat cycle. The deposited dielectric layer (16) has micropores that are misaligned to micropores in the thermal oxide layer (14) to provide enhanced features which the nitrogen/fluorine interface further improves the dielectric's features.
摘要:
A method for forming a capped shallow trench isolation (CaSTI) structure begin by etching a trench opening (210). The opening (210) is filled with an oxide or like trench fill material (216b) via a deposition and chemical mechanical polish (CMP) step. The plug (216b) is reactive ion etched (RIE) to recess a top of the plug (216b) into the trench opening (210) to form a recessed plug region (216c). A silicon nitride or oxynitride capping layer (218b) is then formed over the recessed plug region (216c) via another deposition and polishing step. The nitride cap layer (218b) protects the underlying region (216c) from erosion due to active area preparation, cleaning, and processing.
摘要:
A fax system is automated herein by using a modem (10), a computer (12), and an office network which coupled the computer (12) to a plurality of end-user computers (26). A fax is received by the computer (12) through the modem (10). Once the fax is received by the computer (12), a program (14) stores the fax in a computer file (15) in a non-text format. Code (18) converts the non-text format of file (15) to a text format (17) which is read by a pattern recognition program (18). The program (18) determines, from the file (17), a destination of the fax document. The destination can be one or more of a printer (24), a computer in the plurality of computers (26), a default computer, or a default storage location (e.g., disk storage). A log file (19) is kept by computer (12) to record the operations of the computer (12) and receipt and routing information regarding received faxes. The control code (22) coordinates the other programs in memory (13).
摘要:
A field effect transistor having regions (20, 20', and 20") which respectively function as a planar elevated surface for gate, drain, and source electrical contact, and method of fabrication. The transistor overlies a substrate (12) and is formed partially from active areas (14 and 14'). The regions (20, 20', and 20"), each underlie or are surrounded by a dielectric layer (22). A gate is formed by a gate layer (24). A source (30) is formed within region (20") and is electrically connected to active area (14'). A drain (30') and channel region are formed within region (20'). Electrical contact is made to the source (30), drain (30') and gate layer (24) by conductive layers (34", 34', and 34, respectively).