Abstract:
A patterned buried insulator is formed beneath the source and drain by forming a mask over the body area and implanting a dose of n or p type ions in the areas where the source and drains will be formed, then etching the STI and etching out the implanted area. A light oxidation is followed by a conformal oxide deposition in the STI and also in the etched area, thereby forming the buried oxide only where desired.
Abstract:
A semiconductor structure includes a base semiconductor substrate having a doped region located therein, and an epitaxial region located over the doped region. The semiconductor structure also includes a final isolation region located with the doped region and the epitaxial region. The final isolation region has a greater linewidth within the doped region than within the epitaxial region. A method for fabricating the semiconductor structure provides for forming the doped region prior to the epitaxial region. The doped region may be formed with reduced well implant energy and reduced lateral straggle. The final isolation region with the variable linewidth provides a greater effective isolation depth than an actual trench isolation depth.
Abstract:
PROBLEM TO BE SOLVED: To provide an integrated process at a low cost, with forms a logic circuit including an embedded DRAM array while still preserving the advantages of the logic circuit and a DRAM circuit to the maximum extent possible. SOLUTION: The logic circuit including an embedded DRAM achieves process integration by simultaneously forming a strap connecting a memory cell capacitor with a pass transistor, and a buried dielectric layer isolating logic transistor sources and drains from a substrate. COPYRIGHT: (C)2003,JPO
Abstract:
The present invention relates to a semiconductor device comprising at least one n-channel field effect transistor (n-FET). Specifically, the n-FET comprises first and second patterned stressor layers that both contain a carbon-substituted and tensilely stressed single crystal semiconductor. The first patterned stressor layer has a first carbon concentration and is located in source and drain (S/D) extension regions of the n-FET at a first depth. The second patterned stressor layer has a second, higher carbon concentration and is located in S/D regions of the n-FET at a second, deeper depth. Such an n-FET with the first and second patterned stressor layers of different carbon concentration and different depths provide improved stress profile for enhancing electron mobility in the channel region of the n-FET.
Abstract:
PROBLEM TO BE SOLVED: To provide a SMT (stress memory technique) for both of an nFET and a pFET. SOLUTION: The method includes forming a tensile stress layer 120 over the nFET 104 and a compressive stress layer 122 over the pFET 106, annealing 150 to memorize stress in the semiconductor device and removing the stress layers. The compressive stress layer 122 may include a high stress silicon nitride deposited using a high density plasma (HDP) deposition method. The annealing step may include the one used in a temperature of approximately 400-1,200°C. The high stress compressive silicon nitride and/or the anneal temperatures ensure that the compressive stress memorization is retained in the pFET 106. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
The present invention relates to a semiconductor device comprising at least one n-channel field effect transistor (n-FET). Specifically, the n-FET comprises first and second patterned stressor layers that both contain a carbon-substituted and tensilely stressed single crystal semiconductor. The first patterned stressor layer has a first carbon concentration and is located in source and drain (S/D) extension regions of the n-FET at a first depth. The second patterned stressor layer has a second, higher carbon concentration and is located in S/D regions of the n-FET at a second, deeper depth. Such an n-FET with the first and second patterned stressor layers of different carbon concentration and different depths provide improved stress profile for enhancing electron mobility in the channel region of the n-FET.
Abstract:
VERTICAL BIPOLAR TRANSISTOR A Compressed vertical bipolar transistor configuration that eliminates one side of the standard symmetrical base contact, while also eliminating the requirement for a collector contact reach-thru. The bipolar transistor comprises: a collector layer;a base layer disposed over the collector layer; an emitter layer disposed over the base layer; a first sidewall insulating layer disposed adjacent to and in contact with one side of the emitter layer, the base layer, and at least a portion of the collector layer; a second sidewall insulating layer disposed adjacent to and in contact with another side of the emitter layer and at least a portion of the base layer; and a base contact extension layer formed from heavily doped semiconductor material of the same conductivity type as the base layer, said base contact extension layer being in contact with and extending laterally from another side of the base layer. The structure further includes a base contact interconnect disposed on a surface of the base contact extension layer and; a collector contact extension layer formed from doped semiconductor material with the same conductivity type as the collector layer, with the collector contact extension layer being in contact with the collector layer and extending laterally from or below the one side thereof; and a collector contact interconnect disposed on a surface of the collector contact extension layer and separated from said emitter layer by only one or more insulating layers. FI9-87-027