Abstract:
A semiconductor device having wiring levels on opposite sides and a method of fabricating a semiconductor structure having contacts to devices and wiring levels on opposite sides. The method including fabricating a device on a silicon-on-insulator substrate with first contacts to the devices and wiring levels on a first side to the first contacts, removing a lower silicon layer to expose the buried oxide layer, forming second contacts to the devices through the buried oxide layer and forming wiring levels over the buried oxide layer to the second contacts.
Abstract:
PROBLEM TO BE SOLVED: To provide an encapsulated nanotube structure for protecting a semiconductor device formed on an electrical structure, from an external factor. SOLUTION: A semiconductor device includes a conductive nanotube formed on a first conductive member, so that a first gap exists between a lower side of the conductive nanotube and an upper side of the first conductive member. A second insulating layer is formed on the conductive nanotube. A second gap exists between the upper side of the conductive nanotube and a first part of the second insulating layer. A first via opening and a second via opening are respectively passed through the second insulating layer and extended into the second gap. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an imaging sensor having an array of FET pixels, and a method of forming the imaging sensor. SOLUTION: Each pixel is a semiconductor island such as N-type silicon on a silicon on insulator (SOI) wafer. FETs are formed in one photodiode electrode such as a P-well cathode. A color filter may be attached to an opposite surface of the island. A protective layer (such as a glass or quartz layer) or a protective window is fixed to the pixel array at the color filter. An imaging sensor may be illuminated from the backside with cell wiring above a cell. Thus, an optical signal passing through the protective layer is filtered by the color filter and is selectively sensed by a corresponding photo-sensor. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
Two different gate conductor dielectric caps are used in the array and support device regions so that the bitline contact can be fabricated in the array region, but a thinner hard mask can be used for better linewidth control in the support device region. The thinner dielectric cap is made into dielectric spacers in the array device regions during support mask etching. These dielectric spacers allow for the array gate conductor resist line to be made smaller than the final gate conductor linewidth. This widens the array gate conductor processing window. The second dielectric cap layer improves linewidth control for the support devices and the array devices. Two separate gate conductor lithography steps and gate conductor dielectric etches are carried out in the present invention to optimize the gate conductor linewidth control in the array and support device regions. The gate conductors in the array and support devices regions are etched simultaneously to reduce production cost. In additional embodiments of the invention, dual workfunction support device transistors with or without salicide can be fabricated with an array including borderless contacts.
Abstract:
A semiconductor structure and method of fabricating the structure. The method includes removing the backside silicon (110A and 110B) from two silicon-on- insulator wafers (110A and 100B), respectively, having devices (130A and 130B), respectively, fabricated therein and bonding them back to back utilizing the buried oxide layers (115). Contacts (210) are then formed in the upper wafer (I00B) to devices (130A) in the lower wafer (100A) and wiring levels (170) are formed on the upper wafer (100B). The lower wafer (100A) may include wiring levels (170). The lower wafer (100A) may include landing pads (230) for the contacts. Contacts to the silicon layer (120) of the lower wafer (100A) may be silicided.
Abstract:
PROBLEM TO BE SOLVED: To provide an optical sensor structure and a method for forming the structure. SOLUTION: The optical sensor structure contains (a) a semiconductor substrate and (b) a light-collecting region on the semiconductor substrate. Also, the optical sensor structure contains a funnel-shaped optical pipe on the light-collecting region. The funnel-shaped optical pipe contains (i) a lower cylindrical portion on the light-collecting region and (ii) a funnel-shaped portion, having a tapering shape and arranged on the lower cylindrical portion, while physically coming into direct contact with the lower cylindrical portion. This structure further contains a color filter region on the funnel-shaped optical pipe. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To realize a process for manufacturing two kinds of different gate dielectric thicknesses by using a polysilicon mask and chemical mechanical polishing(CMP). SOLUTION: A thick gate dielectric 102 is grown on a substrate having a memory array area 201 and a logical device area 101, and a gate stack containing a first polysilicon layer 103 is formed on the dielectric 102. Then a thin gate dielectric 200 is formed on the substrate above the logical device area 101, and a second polysilicon layer 300 is formed in the logical device area 101. The thickness of the second polysilicon layer 300 is at least made to be equal to that of the gate stack in the memory array area 201. The structure is flattened by using chemical mechanical polishing(CMP), and the gate stack in the memory array area 201 and logical device area 101 is patterned.
Abstract:
PROBLEM TO BE SOLVED: To provide a dual damascene process that can reliably form aluminum interconnection exhibiting improved electro migration characteristics, as compared with aluminum interconnection that is formed by the conventional RIE technique. SOLUTION: More specifically, the dual damascene process depends on a PVD-Ti/CVD-TiN barrier layer and forms an aluminum line showing great reduction in a saturation resistance level, the inhibition of the electro migration, or both of them especially in a line longer than 100 micrometers. The electromigration life time of the dual damascene aluminum line depends greatly on the conditions of materials and material-filling processes. When there is deviation in the materials and treatment, the electromigration life time way possibly become shorter than life time that is achieved by an aluminum RIE interconnection line, and this becomes a serious matter.
Abstract:
PROBLEM TO BE SOLVED: To increase the densities of borophosphate-silicate glass and an oxide existing on the glass before forming a pattern, by exposing the glass and undoped oxide to a high temperature before a line patterning step, a contact etching step, and an ion implanting step. SOLUTION: After a dielectric layer of borophosphate-silicate glass having fluidity is stuck to the surface of a substrate, another dielectric layer of a material having no fluidity is stuck to the surface of the glass layer. Then, contact etching and a high dose of ion implantation are performed so that an undoped oxide composed of SiO2 existing on the dielectric layer having no fluidity can be exposed to a junction activating annealing temperature, namely, a high annealing temperature of about 800 deg.C to 1,100 deg.C. After the ion implantation, contacts and lines are metallized by again exposing the contacts and lines to a high annealing temperature. Therefore, the densities of the borophosphate-silicate glass and SiO2 existing on the glass can be increased before forming a pattern.