摘要:
In chemical mechanical polishing, a wafer carrier plate is provided with a cavity for reception of a sensor positioned very close to a wafer to be polished. Energy resulting from contact between a polishing pad and an exposed surface of the wafer is transmitted only a very short distance to the sensor and is sensed by the sensor, providing data as to the nature of properties of the exposed surface of the wafer, and of transitions of those properties. Correlation methods provide graphs relating sensed energy to the surface properties, and to the transitions. The correlation graphs provide process status data for process control.
摘要:
An apparatus for reducing non-uniform stretch of a belt used in the CMP system is disclosed. The belt that may be used with the apparatus extends between a first roller and a second roller to define a belt loop with an inner surface and an outer surface to be used for CMP. The apparatus includes a compensating roller that has a first end and a second end where the first end and second end extends a width of the belt. The first end and the second end have a first diameter. The center of the roller has a second diameter that is less than the first diameter. The compensating roller has a symmetrically tapered shape that extends between each of the first end and second end to the center. The compensating roller is positioned inside of the belt loop, and is applied to the inner surface of the belt loop to reduce non-uniform stretch of the belt.
摘要:
A chemical mechanical planarization (CMP) system having a polishing pad, a carrier body for holding a wafer, a retaining ring, and an active retaining ring support is provided. The active retaining ring is defined by a circular ring having a thickness and a width. The circular ring is defined by an elastomeric material. The circular ring is configured to be placed between the retaining ring and the carrier body. The circular ring has a plurality of voids therein, and the plurality of voids are defined in locations around the circular ring. The circular ring has a compressibility level that is set by the elastomeric material and the plurality of voids.
摘要:
Methods for fabricating semiconductor structures having LowK dielectric properties are provided. In one example, a copper dual damascene structure is fabricated in a LowK dielectric insulator including forming a capping film over the insulator before features are defined therein. After the copper is formed in the features, the copper overburden is removed using ultra-gentle CMP, and then the barrier is removed using a dry etch process. Following barrier removal, a second etch is performed to thin the capping film. The thinning is configured to reduce the thickness of the capping film without removal, and thereby reducing the K-value of the LowK dielectric structure.
摘要:
A chemical mechanical polishing (CMP) system is provided. A carrier has a top surface and a bottom region. The top surface of the carrier is designed to hold and rotate a wafer having a one or more formed layers to be prepared. A preparation head is also included and is designed to be applied to at least a portion of the wafer that is less than an entire portion of the surface of the wafer. Preferably, the preparation head and the carrier are configured to rotate in opposite directions. In addition, the preparation head is further configured to oscillate while linearly moving from one of the direction of a center of the wafer to an edge of the wafer and from the edge of the wafer to the center of the wafer so as to facilitate precision controlled removal of material from the formed layers of the wafer.
摘要:
A system and method for polishing semiconductor wafers includes a rotatable polishing pad movably positionable in a plurality of partially overlapping configurations with respect to a semiconductor wafer. A pad dressing assembly positioned coplanar, and adjacent, to the wafer provides in-situ pad conditioning to a portion of the polishing pad not in contact with the wafer. The method includes the step of radially moving the polishing pad with respect to the wafer.
摘要:
One embodiment relates to a dynamic pattern generator for reflection electron beam lithography which includes conductive pixel pads, an insulative border surrounding each conductive pixel pad so as to electrically isolate the conductive pixel pads from each other, and conductive elements coupled to the conductive pixel pads for controllably applying voltages to the conductive pixel pads. The conductive pixel pads are advantageously cup shaped with a bottom portion, a sidewall portion, and an open cavity. Another embodiment relates to a pattern generating apparatus which includes a well structure with sidewalls and a cavity configured above each conductive pixel pad. The sidewalls may include alternating layers of conductive and insulative materials. Other embodiments, aspects and feature are also disclosed.
摘要:
A temperature stabilization system, method, composition of matter and substrate processing system are disclosed. A heat absorbing material is disposed in thermal contact with a substrate. The heat absorbing material is characterized by a solid-liquid phase transition temperature that is in a desired temperature range for material processing the substrate. When the substrate is subjected to material processing that results in heat transfer into or out of the substrate the solid-liquid phase transition of the heat absorbing material stabilizes the temperature of the substrate.
摘要:
A first embodiment of the invention relates to a method for evaluating the quality of structures on an integrated circuit wafer. Test structures formed on either on the integrated or on a test wafer are exposed to an electron beam and an electron-beam activated chemical etch. The electron-beam activated etching gas or vapor etches the test structures, which are analyzed after etching to determine a measure of quality of the test structures. The measure of quality may be used in a statistical process control to adjust the parameters used to form device structures on the integrated circuit wafer. The test structures are formed on an integrated circuit wafer having two or more die. Each die has one or more integrated circuit structures. The test structures are formed on scribe lines between two or more adjacent die. Each test structure may correspond in dimensions and/or composition to one or more of the integrated circuit structures.
摘要:
A method for measuring a metal film thickness is provided. The method initiates with heating a region of interest of a metal film with a defined amount of heat energy. Then, a temperature of the metal film is measured. Next, a thickness of the metal film is calculated based upon the temperature and the defined amount of heat energy. A chemical mechanical planarization system capable of detecting a thin metal film through the detection of heat transfer dynamics is also provided.