摘要:
An incandescent lamp (54) containing a coiled filament (28) within a vitreous envelope wherein the filament is supported at at least one point along its coil length by a refractory metal support wire (10) one end of which is welded to a coil (28) and the other end secured to the envelope wall by a glass bead (24). The support prevents filament sag during lamp operation and is especially useful with double-ended high intensity tungsten-halogen lamps having an elliptically shaped filament chamber with an infrared reflecting and visible light transmitting optical interference coating on the chamber.
摘要:
A process for forming multi-layer optical quality films by sputtering at least a first and second material with at least two unbalanced DC magnetron sputtering devices. During sputtering, an effective negative radio frequency or alternating current bias is applied to the substrate and an arc suppression device is operated to reduce arcing on the sputtering devices. In addition, a controlled partial pressure of a reactive gas is maintained in the sputtering chamber to provide a sufficient amount of reactive gas to form the desired compound on the substrate without substantially poisoning the target.
摘要:
A tungsten-halogen lamp (10) operating at temperatures above 250°C which contain a mixture of phosphine, hydrogen, bromine and inert gas have been found to have superior life and lumen maintenance when the atomic ratio of phosphorus to bromine in the lamp is in the range of from 0.4-2.5.
摘要:
A tungsten-halogen lamp (10) operating at temperatures above 250°C which contain a mixture of phosphine, hydrogen, bromine and inert gas have been found to have superior life and lumen maintenance when the atomic ratio of phosphorus to bromine in the lamp is in the range of from 0.4-2.5.
摘要:
A thermal processor for at least one semiconductor wafer includes a reactor chamber (12) having a material substantially transparent to light including a wavelength within the range of about 200 nanometers to about 800 nanometers for holding the at least one semiconductor wafer. A coating (16) including a material substantially reflective of infrared radiation can be present on at least a portion of the reactor chamber. A light source (18) provides radiant energy to the at least one semiconductor wafer through the coating and the reactor chamber. The light source can include an ultraviolet discharge lamp, a halogen infrared incandescent lamp, or a metal halide visible discharge lamp. The coating can be situated on an inner or outer surface of the reactor chamber. If the reactor chamber has inner and outer walls, the coating can be situated on either the inner wall or the outer wall.
摘要:
The support or spud (10) is of refractory metal wire in the shape of a ring (12) with a loop (14, 16) on each side. It radially aligns and provides electricity to a filament (24) in eg. a double ended tungsten halogen lamp. The spud has a leg (18, 20) extending from the end of each loop, one (20) of which is attached to the filament and the other (15) forming part of an inlead assembly. This spud is particularly useful with relatively small size double ended tungsten-halogen lamps having an infrared reflecting coating on the surface of the vitreous filament chamber.
摘要:
A thermal processor for at least one semiconductor wafer includes a reactor chamber (12) having a material substantially transparent to light including a wavelength within the range of about 200 nanometers to about 800 nanometers for holding the at least one semiconductor wafer. A coating (16) including a material substantially reflective of infrared radiation can be present on at least a portion of the reactor chamber. A light source (18) provides radiant energy to the at least one semiconductor wafer through the coating and the reactor chamber. The light source can include an ultraviolet discharge lamp, a halogen infrared incandescent lamp, or a metal halide visible discharge lamp. The coating can be situated on an inner or outer surface of the reactor chamber. If the reactor chamber has inner and outer walls, the coating can be situated on either the inner wall or the outer wall.
摘要:
An alkali metal vapor arc discharge lamp which operates on DC and employs an amalgam of mercury and an alkali metal such as sodium, has a cathode to anode pressure ratio no greater than 5 and a cathode end temperature at least 50°C hotter than the anode end temperature to prevent cataphoretic separation of the mercury and alkali metal in the arc discharge during operation of the lamp. The lamp is designed to have a cataphoretic driving parameter (CDP) value of less than 150. The CDP is defined as the product of the arc current in amperes, times the arc gap length in centimeters, divided by square of the inner diameter of the arc tube in centimeters.