摘要:
A catalytic material useful for the abatement of NO.sub.x in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorporated into the zeolite by ion exchange and precipitation. The catalytic material may typically contain from about 2.0 to about 8.0 percent copper, from about 1.0 to about 4.0 percent iron and from about 0.25 to about 4.0 percent cobalt by weight of the catalytic material, i.e., by weight of the zeolite material plus the catalytic metals incorporated therein. Optionally, the catalytic material may be admixed with a binder and applied as an adherent coating onto a carrier to be placed in a gas stream containing the nitrogen oxides.
摘要:
A catalytic material useful for the abatement of NO.sub.X in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorporated into the zeolite by ion exchange and precipitation. The catalytic material may typically contain from about 2.0 to about 8.0 percent copper, from about 1.0 to about 4.0 percent iron and from about 0.25 to about 4.0 percent cobalt by weight of the catalytic material, i.e., by weight of the zeolite material plus the catalytic metals incorporated therein. Optionally, the catalytic material may be admixed with a binder and applied as an adherent coating onto a carrier to be placed in a gas stream containing the nitrogen oxides.
摘要:
A low harmonic radio-frequency (RF) switch in a silicon-on-insulator (SOI) substrate and methods of manufacture. A method includes forming at least one trench through an insulator layer. The at least one trench is adjacent a device formed in an active region on the insulator layer. The method also includes forming at least one cavity in a substrate under the insulator layer and extending laterally from the at least one trench to underneath the device.
摘要:
A semiconductor structure. A hard mask layer is on a top substrate surface of a semiconductor substrate. The hard mask layer includes a hard mask layer opening through which a portion of the top substrate surface is exposed to a surrounding ambient. The hard mask layer includes a pad oxide layer on the top substrate surface, a nitride layer on the pad oxide layer, a BSG (borosilicate glass) layer on top of the nitride layer, and an ARC (anti-reflective coating) layer on top of the BSG layer. A BSG side wall surface of the BSG layer is exposed to the surrounding ambient through the hard mask layer opening.
摘要:
A low resistance contact structure and method of making the structure. The structure includes a polysilicon contact through an upper silicon layer and buried oxide layer to a lower silicon layer of a silicon-on-insulation substrate. A region of the upper silicon layer surrounds the polysilicon contact and top surface of the polysilicon contact and surrounding region of upper silicon layer are metal silicided providing an extended contact area greater than the area of the top surface of polysilicon contact.
摘要:
A low resistance contact structure and method of making the structure. The structure includes a polysilicon contact through an upper silicon layer and buried oxide layer to a lower silicon layer of a silicon-on-insulation substrate. A region of the upper silicon layer surrounds the polysilicon contact and top surface of the polysilicon contact and surrounding region of upper silicon layer are metal silicided providing an extended contact area greater than the area of the top surface of polysilicon contact.
摘要:
A method for etching a deep trench in a semiconductor substrate. The method comprises the steps of (a) forming a hard mask layer on top of the semiconductor substrate, (b) etching a hard mask opening in the hard mask layer so as to expose the semiconductor substrate to the atmosphere through the hard mask layer opening, wherein the step of etching the hard mask opening includes the step of etching a bottom portion of the hard mask opening such that a side wall of the bottom portion of the hard mask opening is substantially vertical, and (c) etching a deep trench in the substrate via the hard mask opening.
摘要:
A method for etching a deep trench in a semiconductor substrate. The method comprises the steps of (a) forming a hard mask layer on top of the semiconductor substrate, (b) etching a hard mask opening in the hard mask layer so as to expose the semiconductor substrate to the atmosphere through the hard mask layer opening, wherein the step of etching the hard mask opening includes the step of etching a bottom portion of the hard mask opening such that a side wall of the bottom portion of the hard mask opening is substantially vertical, and (c) etching a deep trench in the substrate via the hard mask opening.
摘要:
A method of making a semiconductor structure includes forming a trench through a shallow trench isolation (STI) structure and into a substrate, and forming a liner including an electrical insulator material on sidewalls of the trench. The method also includes forming a core including a high thermal conductivity material in the trench and on the liner, and forming a cap in the trench and on the core.
摘要:
A low resistance contact structure and method of making the structure. The structure includes a polysilicon contact through an upper silicon layer and buried oxide layer to a lower silicon layer of a silicon-on-insulation substrate. A region of the upper silicon layer surrounds the polysilicon contact and top surface of the polysilicon contact and surrounding region of upper silicon layer are metal silicided providing an extended contact area greater than the area of the top surface of polysilicon contact.