Abstract:
A new method and structure for the combined creation of CMOS devices and LED devices. The process starts with a substrate over the surface of which are designated a first surface region for the creation of CMOS devices there-over and a second surface region for the creation of LED devices there-over. A relatively thick layer of gate oxide is created over the surface of the substrate. The first surface region is blocked by a mask of photoresist after which the second surface region is exposed to a plasma etch, thereby providing roughness to the surface of the relatively thick layer of gate oxide and reducing the thickness thereof. The blocking mask is removed, additional oxidation of the exposed surface creates a relatively thick layer of gate oxide over the first surface area and a relatively thin layer of gate oxide over the second surface area.
Abstract:
A new method based on measuring the weight of a wafer (on which the layer of HSG has been deposited) before (W1) and after (W2) the surface of the HSG layer is coated with a layer of either photoresist or SOG. The difference delta W=W2−W1 provides an indicator of the roughness or smoothness of the surface of the deposited layer of HSG. This new method can also be based on measuring the weight W of rejected or dropped PR or SOG after the surface of the HSG layer has been coated with a layer of either photoresist or SOG. The weight of the rejected or dropped PR or SOG also provides an indicator of the roughness or smoothness of the surface of the deposited layer of HSG.
Abstract:
A bus structure may include two or more soft buses and one or more soft separation layers. The two or more soft buses may be stacked side by side with respect to each other. The one or more soft separation layers may be sandwiched between two adjacent soft buses of the two or more soft buses.
Abstract:
A belt tension adjustment mechanism for use in an optical module of a scanning apparatus includes a sliding member, a fixture member, a supporting member and a resilient member. The sliding member is arranged on a surface of the optical module and movable on the surface of the optical module. The fixture member is used to fix the belt. The supporting member supports the belt. By means of the resilient member, a tension is applied onto the belt.
Abstract:
A CMOS image sensor having increased capacitance that allows a photo-diode to generate a larger current is provided. The increased capacitance reduces noise and the dark signal. The image sensor utilizes a transistor having nitride spacers formed on a buffer oxide layer. Additional capacitance may be provided by various capacitor structures, such as a stacked capacitor, a planar capacitor, a trench capacitor, a MOS capacitor, a MIM/PIP capacitor, or the like. Embodiments of the present invention may be utilized in a 4-transistor pixel or a 3-transistor pixel configuration.
Abstract:
A ladder assembly includes two symmetric support stands pivotally connected with each other. Each of the two support stands includes a main frame, an upper frame, a lower frame, a top bar, a retraction control unit, and four fixing devices. Thus, height of the ladder assembly can be adjusted easily and conveniently, thereby facilitating the user operating the ladder assembly. In addition, the upper frame and the lower frame can be folded on the main frame, so as to reduce the volume the ladder assembly efficiently, thereby greatly facilitating storage and transportation of the ladder assembly.
Abstract:
A new method is provided for the creation of a 1T RAM cell. Standard processing is applied to create STI trenches in the surface of a substrate, N2 implantations are performed into the sidewalls of the STI trenches. A layer of lining oxide is created, the implanted N2 interacts with the lining oxide to form SiON over exposed surfaces of the STI trenches. STI oxide is deposited and polished, filling the STI trenches there-with. Crown patterning is performed to define capacitor areas, the crown patterning stops on a layer of etch stop material and the created SION and partially removes STI oxide from the STI trenches. Layers of etch stop material, exposed SiON and pad oxide are removed, exposing the surface of the silicon substrate, the etched layers of STI oxide are not affected by this removal. A layer of SAC oxide is grown, n-well and p-well implantations are performed into the surface of the substrate. The layer of SAC oxide is removed, gate oxide is grown, polysilicon is deposited and patterned and etched, forming polysilicon gate material and polysilicon top plate of the capacitor. Standard processing is further applied to complete the 1T-RAM cell by providing gate spacers and impurity implantations for the gate electrode, by saliciding contact surfaces and by providing contacts to the points of contact of the cell.
Abstract:
A method for forming a self aligned contact without key holes using a two step contact deposition. The process begins by providing a semiconductor structure having conductive structures (such as bit lines) thereover with sidewalls and having a contact area adjacent to the conductive structures. The conductive structures comprise at least one conductive layer with a hard mask thereover. A spacer layer is formed over the hard mask and the substrate structure and anisotropically etched to form sidewall spacers on the sidewalls of the conductive structure. A second dielectric (IPO) layer is formed over the sidewall spacers, the hard mask, and the substrate structure, whereby the second dielectric layer has a keyhole. A contact opening is formed in the second dielectric layer over the contact area. A first contact layer having poor step coverage is formed in the contact openings and over the second dielectric layer, thereby plugging the keyhole without filling it. A second contact layer is formed over the first contact layer.
Abstract:
A method of forming a contact in a thin film transistor with a gate electrode and an interconnect formed on a substrate, in an SRAM device comprises the following steps. Form a gate oxide layer over device. Form a split amorphous silicon layer over gate oxide layer. Form a cap layer over split amorphous silicon layer. Form a contact opening down to interconnect. Form contact metallization in opening on the surface of interconnect either as a blanket titanium layer followed by rapid thermal anneal to form a silicide and stripping unreacted titanium or by selective formation of a tungsten metal silicide in the opening. Strip cap layer from device. Form a second amorphous silicon layer on split silicon layer. Recrystallize silicon layers to form a polysilicon channel layer from amorphous silicon layers. Dope regions of polysilicon channel layer aside from a channel region above gate electrode.
Abstract:
A contact process interconnects poly-crystal silicon layer, and more particularly, this process dramatically decreases the voltage drop within a poly-crystal silicon layer. The advantages of the process include not only improvement in the interface quality of Poly-Si/SiO2 to decrease the junction damage but also do not increase its process complexity and its mask number during the fabrication of poly-crystal silicon thin-film SRAM to meet high integration requirement in VLSI.