摘要:
When a magnetron is scanned about the back of a target in a selected complex path having radial components, the erosion profile has a form depending upon the selection of paths. A radial erosion rate profile for a given magnetron is measured. Periodically during scanning, an erosion profile is calculated from the measured erosion rate profile, the time the magnetron spends at different radii, and the target power. The calculated erosion profile may be used to indicate when erosion has become excessive at any location prompting target replacement or to adjust the height of the magnetron above the target for repeated scans. In another aspect of the invention, the magnetron height is dynamically adjusted during a scan to compensate for erosion. The compensation may be based on the calculated erosion profile or on feedback control of the present value of the target voltage for a constant-power target supply.
摘要:
An isolator ring is provided for a substrate support used in a substrate processing chamber. The substrate support comprises an annular ledge having a circumferential edge, and an inner perimeter sidewall. The isolator ring comprises an L-shaped dielectric ring comprising a laser textured surface; a horizontal leg capable of resting on the annular ledge of the support, and having a length that extends radially outward and stops short of the circumferential edge of the annular ledge; and a vertical leg abutting the inner perimeter sidewall of the support. A ring assembly includes the isolator ring and a deposition ring.
摘要:
Process kit shields for use in a process chamber and methods of use thereof are provided herein. In some embodiments, the process kit shield may include a body having a wall comprising a first layer and a second layer bonded to the first layer, wherein the first layer comprises a first material resistant to a cleaning chemistry utilized to remove material disposed on the first layer during processing, and wherein the second layer comprises a second material different than the first material and having a coefficient of thermal expansion substantially similar to that of the first material. In some embodiments, the process kit shield may be disposed in a process chamber having a processing volume and a non-processing volume. The process kit shield may be disposed between the processing volume and the non-processing volume
摘要:
Embodiments of the present invention generally relate to an apparatus and method for uniform sputter depositing of materials into the bottom and sidewalls of high aspect ratio features on a substrate. In one embodiment, a sputter deposition system includes a collimator that has apertures having aspect ratios that decrease from a central region of the collimator to a peripheral region of the collimator. In one embodiment, the collimator is coupled to a grounded shield via a bracket member that includes a combination of internally and externally threaded fasteners. In another embodiment, the collimator is integrally attached to a grounded shield. In one embodiment, a method of sputter depositing material includes pulsing the bias on the substrate support between high and low values.
摘要:
Embodiments described herein generally relate to components for a semiconductor processing chamber, a process kit for a semiconductor processing chamber, and a semiconductor processing chamber having a process kit. In one embodiment a lower shield for encircling a sputtering target and a substrate support is provided. The lower shield comprises a cylindrical outer band having a first diameter dimensioned to encircle the sputtering surface of the sputtering target and the substrate support, the cylindrical band comprising a top wall that surrounds a sputtering surface of a sputtering target and a bottom wall that surrounds the substrate support, a support ledge comprising a resting surface and extending radially outward from the cylindrical outer band, a base plate extending radially inward from the bottom wall of the cylindrical band, and a cylindrical inner band coupled with the base plate and partially surrounding a peripheral edge of the substrate support.
摘要:
A fiber retention device is provided for retention of fibers such as optical fibers, tubing, cables, buffer tubes and other elongate objects. The retention device includes, generally, a mounting retainer and a resilient sleeve. The mounting retainer is formed of a resilient material and defines one or more generally U-shaped support channels. The resilient sleeve is positioned in the U-shaped support channel and defines at least one expandable passageway for receiving a fiber therein. The passageway diameter is less than the fiber diameter in a pre-load orientation or relaxed condition prior to inserting the fiber into the passageway. The support channel selectively includes a plurality of tabs for locating the sleeve therein including tabs on a bottom wall for resisting relative horizontal movement and tabs on a side wall for resisting relative vertical movement of the sleeve within the channel. The sleeve is positively located by the channel, and the fiber is retained and strain relieved by the elastomer sleeve. A mounting flange is provided for coupling a plurality of mounting retainers in a coupled orientation as desired.
摘要:
A plasma sputtering method for metal chalcogenides, such as germanium antimony telluride (GST), useful in forming phase-change memories. The substrate is held at a selected temperature at which the material deposits in either an amorphous or crystalline form. GST has a low-temperature amorphous range and a high-temperature crystalline range separated by a transition band of 105-120° C. Bipolar pulsed sputtering with less than 50% positive pulses of less than 10:s pulse width cleans the target while maintain the sputtering plasma. The temperature of chamber shields is maintained at a temperature favoring crystalline deposition or they may be coated with arc-spray aluminum or with crystallographically aligned copper or aluminum.
摘要:
An optical fiber splice case particularly adapted for providing fiber optic links directly to a home, business, et al. is provided wherein at least one enclosure base has at least one cover member selectively sealingly engaged with at least one side of the at least one enclosure base. The at least one enclosure base includes at least one bulkhead having a selective plurality of optical fiber ports therethrough.
摘要:
A safety pressure regulator employing a diaphragm actuator that upon exposure to high temperature an element melts to release the valve from the actuator to effect its automatic closing.
摘要:
A cryogenic freezer is disclosed for embrittling scrap material, such as random size pieces of automobile tires, prior to fragmentation of the embrittled scrap material in an impact mill. The freezer includes a product discharge gas lock which is designed to minimize the loss of cryogenic refrigerant while, at the same time, accomodating unusually large pieces of scrap material.