3716results about "Control devices for furnaces" patented technology

A reactor chamber is positioned between a top array of LED heat lamps and a bottom array of LED heat lamps. The LED heat lamps forming the top and bottom arrays are individually or controllable in groups such that power output along each array of LED heat lamps can dynamically differ. The LED lamps can be controlled in response to, for example, feedback from chamber sensors, a desired temperature profile, and a failed LED lamp. In this way, the methods and systems described herein can dynamically compensate for operational characteristics of the reactor chamber. In one configuration, the LED heat lamps are arranged in a rectangular pattern. In some configurations, the LED heat lamps are arranged in a circular or a concentric pattern.

A method for providing a magnetic recording transducer is described. The method includes providing a pinned layer for a magnetic element. In one aspect, a portion of a tunneling barrier layer for the magnetic element is provided. The magnetic recording transducer annealed is after the portion of the tunneling barrier layer is provided. The annealing is at a temperature higher than room temperature. A remaining portion of the tunneling barrier layer is provided after the annealing. In another aspect, the magnetic transducer is transferred to a high vacuum annealing apparatus before annealing the magnetic transducer. In this aspect, the magnetic transducer may be annealed before any portion of the tunneling barrier is provided or after at least a portion of the tunneling barrier is provided. The annealing is performed in the high vacuum annealing apparatus. A free layer for the magnetic element is also provided.

A convection oven having a vapor collection system; water injection system; easily accessible electrical components; and a variable-speed, reversible blower is disclosed. The vapor collection system collects vapor from the cooking chamber during a cooking event, condenses the vapor, and drains the condensed vapor. The water injection system injects water for impact against a blower wheel for dispersion into the air circulating through the cooking chamber. The electrical components are housed within a housing that in a closed position conceals the components and in a closed position exposes the components for easy access. The rotational speed and direction of the variable-speed, reversible blower is controlled during a cooking event according to predetermined speed curves which may include one or more reversal events to achieve more uniform cooking of food. A main controller is programmable via an operator input (e.g., liquid crystal display touch screen) to control operating parameters of the oven.

A light source comprising a plurality of flash lamps emits flashes thereby flash-heating a semiconductor wafer held by a thermal diffuser and a hot plate. The current distance of irradiation between the thermal diffuser and the hot plate holding the semiconductor wafer and the light source is so adjusted as to attain predetermined intensity of irradiation. The distance of irradiation between the thermal diffuser and the hot plate and the light source can be changed or corrected by vertically moving the thermal diffuser and the hot plate. Thus provided is a thermal processing apparatus using the flash lamps, capable of readily controlling the intensity of irradiation.