Abstract: Provided are structures and methods for forming structures with sloping surfaces of a desired profile. An exemplary method includes performing a first etch process to differentially etch a gate material to a recessed surface, wherein the recessed surface includes a first horn at a first edge, a second horn at a second edge, and a valley located between the first horn and the second horn; depositing an etch-retarding layer over the recessed surface, wherein the etch-retarding layer has a central region over the valley and has edge regions over the horns, and wherein the central region of the etch-retarding layer is thicker than the edge regions of the etch-retarding layer; and performing a second etch process to recess the horns to establish the gate material with a desired profile.

Abstract: A model locomotive with vapor-smoking and furnace-firing-and-lighting effects comprises an outer body; a hollow body installed within the outer body for installing liquid of specific volume; a funnel smoking tube installed at a front wall of the inner body; a steam whistle smoking tube, a safety valve smoking tube and a generator smoking tube installed at an upper wall of the inner body; a wind inlet tube for a blower installed at a rear wall of the inner body; a vapor generator, an air-exhausting and water-draining tube for a cylinder, and a water level switch being installed at a lower wall of the inner body; and a plurality of transparent smoking tube installed at a front wall and a rear wall of the inner body for viewing an interior of the inner body; a plurality of lighting elements being installed at the interior of the inner body, an outer side of the rear wall of the inner body and an interior of an opening of a combustion chamber.

Abstract: A model locomotive with vapor-smoking and furnace-firing-and-lighting effects comprises an outer body; a hollow body installed within the outer body for installing liquid of specific volume; a funnel smoking tube installed at a front wall of the inner body; a steam whistle smoking tube, a safety valve smoking tube and a generator smoking tube installed at an upper wall of the inner body; a wind inlet tube for a blower installed at a rear wall of the inner body; a vapor generator, an air-exhausting and water-draining tube for a cylinder, and a water level switch being installed at a lower wall of the inner body; and a plurality of transparent smoking tube installed at a front wall and a rear wall of the inner body for viewing an interior of the inner body; a plurality of lighting elements being installed at the interior of the inner body, an outer side of the rear wall of the inner body and an interior of an opening of a combustion chamber.

Abstract: A charged particle device is provided comprising a charged particle source configured to direct charged particles in the direction of a specimen under examination and an imaging device configured to convert charged particles to an image representing the specimen. The imaging device comprises a detector defining a pixel array. The detector is configured to generate electric charges for individual pixels of the pixel array such that the electric charges collectively define the image. The imaging device is configured such that a portion of the pixel array can be transitioned between a partially masked state and a substantially unmasked state.