Abstract:
Object surfaces such as semiconductor wafers which are suspended in a rinsing fluid may be dried by replacing the rinsing fluid, such as water, with a drying vapor by directly displacing the water from the surfaces at such a rate that substantially no liquid droplets are left on the surfaces after replacement of the water with drying vapor. Preferably, the drying vapor is miscible with water and forms a minimum-boiling azeotrope with water, such as isopropanol. The drying vapor is then purged with a stream of dry, inert, noncondensable gas such as nitrogen. A vaporizer with automatic refill mechanism produces saturated drying vapor which may then be flashed to a superheated vapor prior to contacting the surfaces, which preferably are at the same temperature as the vapor. Preferably, no liquid is removed by evaporation, and the drying takes place in an enclosed, hydraulically full system which does not require movement or handling of the surfaces between rinsing and drying steps.
Abstract:
A system for the fluid treatment of semiconductor wafers includes a treatment vessel having opposed first and second ports, and means for holding wafers in a flow path therebetween. A flow segment comprising in sequence, a first vent, a first valve, an inlet, a second valve and a second vent extends between the first and the second port so as to constitute, together with the vessel, a closed fluid loop.A fluid delivery system for the delivery of a sequence of high purity treatment fluids to a treatment vessel includes a measuring tank having opposed ports and configured for plug flow between the ports, and a metering pump having its inlet connected to a said port for withdrawing metered amounts of fluid from the tank. A plurality of reservoirs of treatment fluid are each connected via a respective associated valve to one of the said ports. The tank is maintained hydraulically full, so that actuating the pump to withdraw a metered volume of fluid from the tank, and opening a valve associated with a selected treatment fluid draws the metered volume of the selected treatment fluid into the tank. Passive or non-mechanical means is provided for delivering the contents of the tank to a treatment vessel.A mixing tank may be provided, between the measuring tank and the treatment vessel. Mixing may be accomplished by bubbling a gas through the fluid held in the mixing tank.
Abstract:
A coating device includes a ring-shaped outer circumferential groove formed along and adjacent to the outer circumferential rim of a cup means and communicated with a processing vessel, and a processing liquid supply source connected to the outer circumferential groove through nozzles. A partition wall is erected, as an inner wall of the cup means, inside the outer circumferential groove with the nozzles and a groove interposed between them. The supply of the processing liquid can be thus made stable and processing failure because of air bubbles mixed in the liquid and irregular coating of the liquid on substrates can be prevented.
Abstract:
An apparatus for depositing a mono-molecular layer on a substrate surface comprises first and second containers which contain a liquid and are connected via a connecting passage, and a pressure applying mechanism for applying pressure on the liquid in the second container. A mono-molecular layer is formed at the liquid surface of the liquid in the first container, and the mono-molecular layer is deposited on the substrate surface by controlling the pressure applying mechanism so that the liquid surface of the first container rises and falls with respect to the substrate which is essentially stationary.
Abstract:
An inexpensive, readily handled receptacle for use in the bulk impregnation of timber by vacuum impregnation is made of flexible fluid-impermeable material and, over parts of its walls, is of double thickness to form closed pockets that can be inflated to form a container of rectangular shape hinged along one of its side faces to provide a sealable opening for loading and unloading. The pockets have a valve for inflating them with air; the receptacle has inlet and outlet ports for evacuating the receptacle and introducing impregnant. Preferably, the receptacle is supported in a two-part rectangular frame hinged along one side face.
Abstract:
Described is apparatus designed for applying enamel slip simultaneously to the internal and external surfaces of a pipe which includes a housing with a rod mounted centrally therein so that a clearance space is formed therebetween. That clearance space measures somewhat more than the thickness of the wall of the pipe under treatment which is to be moved in the clearance space, which is being filled with enamel slip. The clearance space between the housing and the rod measures at least 1.5 times the thickness of the pipe wall.In one of the embodiments of the invention, the housing and the rod are of cylindrical shape.The housing is provided with an enamel circulation system which includes a pump communicating with the housing and a reservoir via pipelines. The reservoir is filled with enamel slip and is provided with a thermoregulator.
Abstract:
An apparatus for surface treatment of a workpiece in a production line comprises a positioning frame (1) for the workpiece to be treated. The positioning frame has a coupling (3) for a positioning drive (4). In order to achieve an increase in the production cadence irrespective of the type of surface treatment without having to accept losses with regard to the surface quality of the coating, a hermetically sealable capsule (2) is supported against the positioning frame (1), which capsule (2) has connection lines (5) for the exchange of operating media with different operating medium supply units (6) arranged along the production line.
Abstract:
An apparatus (200) for smoothing a surface of an object (100). The apparatus includes a chamber (210), a reservoir (324) configured to hold a liquid (322), and a nebulizer assembly (212) configured to generate a mist (104) from the liquid into the chamber. The nebulizer assembly includes a mesh (732), a vibrating element (731), and a wick (736). The object is received in the chamber and the mist is configured to surround the object.