摘要:
A polishing endpoint detecting device of a polishing apparatus detects a polishing endpoint of a polishing process by measuring light reflected from a surface of a semiconductor substrate being polished. The apparatus also includes a polishing pad and a rotary plate each of a light-transmitting material. The light is directed onto the surface of the semiconductor substrate through the polishing pad and the rotary plate and is scanned across the surface of the semiconductor substrate along a horizontal line which passes through the centers of the polishing pad and the semiconductor substrate. A light-measuring instrument measures a characteristic of the light reflected from the surface of the semiconductor substrate, and a processor detects the polishing endpoint by analyzing signals produced by the light measuring instrument.
摘要:
A dual semiconductor wafer slippage, or loss, and water-resistant sensor holder for chemical mechanical polishing (CMP) semiconductor fabrication equipment is disclosed. The holder has a body and a cover. The body is designed to hold two wafer slippage sensors at an angle to a vertical plane, such as substantially fifteen degrees, and has a window to allow the sensors to detect wafer slippage. The cover is situated over the window of the body to prevent slurry from spraying and drying onto the sensors during high-pressure rinse cleaning of a platen of the CMP semiconductor fabrication equipment.
摘要:
A polishing apparatus comprises a polishing table having a polishing surface, a top ring for holding a substrate and pressing a surface of the substrate against the polishing surface to polish the surface of the substrate, and at least one optical measuring device disposed adjacent to the outer peripheral portion of the polishing table and below the polishing surface of the polishing table for measuring the thickness of a layer formed on the surface of the substrate. The polishing apparatus further comprises at least one notch formed in the peripheral portion of the polishing table. The notch allows light emitted from the optical measuring device to pass therethrough and be incident on the surface of the substrate and allows light reflected from the surface of the substrate to pass therethrough and be incident on the optical measuring device.
摘要:
A polishing pad having an optical assembly that does not cause excess wear on a wafer workpiece. The optical assembly is disposed within the pad such that it may move in response to forces applied to the optical assembly.
摘要:
An indicator for deciding a grinding amount of a liquid crystal display panel and a method for detecting grinding failure using the same are disclosed in the present invention. The indicator includes at least one alignment mark formed at a gate pad unit and a data pad unit of a liquid crystal display panel, and at least one pattern for detecting a grinding amount between a first end portion of the gate pad unit and the alignment mark, and a second end portion of the data pad unit and the alignment mark.
摘要:
A polishing solution is dispensed onto a polishing pad that has a polishing surface, a substrate is brought into contact with the polishing surface, relative motion is created between the substrate and the polishing pad, a light beam is directed through a window in the polishing pad to impinge the substrate, and an intensity of a reflected light beam from the substrate is monitored. The polishing solution has a first refractive index, and the window has a second index of refraction that is approximately equal to the first index of refraction.
摘要:
An optical sensor that includes a light source and a detector is located within a cavity in a polishing pad so as to face the surface that is being polished. Light from the light source is reflected from the surface being polished and the detector detects the reflected light. The electrical signal produced by the detector is conducted to a hub located at the central aperture of the polishing pad. The disposable polishing pad is removably connected, both mechanically and electrically to the hub. The hub contains electronic circuitry that is concerned with supplying power to the optical sensor and with transmitting the electrical signal to a non-rotating station. Several techniques are described for accomplishing these tasks. The system permits continuous monitoring of an optical characteristic of a surface that is being polished, even while the polishing machine is in operation, and permits the end point of the polishing process to be determined.
摘要:
Apparatus for inline measurement of material removal during a polishing or grinding process including: a. a substantially circular rotatable grinding or polishing pad; and b. a sample holder; and c. a sample with a top, a bottom and one or more side surfaces; the sample holder being arranged to hold the bottom surface of the sample in contact with the pad and the sample holder being connected to a moving device to move the sample to a position at least partially over the rim of the pad, during at least a part of the process, the apparatus also including a detecting device for sampling the distances between a reference mark and a target area in the sample and a plane defined by the bottom surface of the sample during the process.
摘要:
In a semiconductor manufacturing process such as the CMP process with the large ratio of manual work, the automation is promoted in order to achieve the rationalization and the manpower reduction, the improvement of the processing ability, the reduction of the investment amount, and the improvement of the indirect operation efficiency. By just downloading the process recipe of the product wafer from the host computer to the CMP apparatus in the CMP process, the dummy wafer is processed under the predetermined process condition before processing the product wafer. In this manner, the unmanned operation can be achieved. In addition, the measurement data of the film thickness measuring device mounted to the unmanned CMP apparatus is transmitted together with such process data as the polishing time from the CMP apparatus to the host computer. By doing so, the recipe condition of the CMP apparatus can be changed based on the latest data, and the process condition of the subsequent process is used in the feedforward manner based on the film thickness measurement data. In this manner, it is possible to eliminate the measurement process in the subsequent process.