Abstract:
A polishing system includes a platen having a top surface, an annular polishing pad supported on the platen, a carrier head to hold a substrate in contact with the annular polishing pad, a support structure from which the carrier head is suspended and which is configured to move the hold the carrier head laterally across the polishing pad, and a controller. The platen is rotatable about an axis of rotation that passes through approximately the center of the platen, and the inner edge of the annular polishing pad is positioned around the axis of rotation. The controller is configured to cause the support structure to position the carrier head such that a portion of the substrate overhangs the inner edge of the annular polishing pad while the substrate is contacting the polishing pad.
Abstract:
A polishing article and its use as a polishing article for various substrates, especially for polishing a semiconductor wafer. The article is comprised of a mesh of splittable intermingled fibers and a binder material holding the fibers in the mesh. The fibers and binder material provide the polishing pad with an absorptive property that maintains the slurry chemistry and particles near the surface for effective polishing.
Abstract:
A polishing pad is disclosed which enables to stably polish the surface of an object smooth and flat by applying the polishing technique for determining when polishing is completed. A method for producing such a polishing pad is also disclosed. A polishing pad (10) is composed of a light-transmitting pad having a polishing surface (11a) on the front side. By forming a recess (12) on the back side (11b) of the light-transmitting pad (11), the light transmittance can be locally changed. The light-transmitting pad (11) has a light transmittance of not less than 10%, preferably of not less than 30%, to at least a light having a wavelength within the region of 350-900 nm. The light-transmitting pad (11) has a light transmittance of not less than 10% preferably over the light wavelength region of 370-900 nm, more preferably over the light wavelength region of 390-900 nm. The light-transmitting pad (11) has a light transmittance of not less than 30% preferably over the light wavelength region of 400-900 nm, more preferably over the light wavelength region of 450-900 nm.
Abstract:
The invention is directed to chemical-mechanical polishing pads comprising a transparent window comprising a polymer resin having a first index of refraction and an inorganic material having a second index of refraction. The transparent window has a light transmittance of 10% or more at a wavelength of 200nm to 10,000 nm. The difference between the first index of refraction and the second index of refraction is 0.3 o less at the wavelength.
Abstract:
The invention provides a polishing disk (10) comprising (a) a body comprising a front surface (11), a back surface (12), and a peripheral surface (13), (b) a polishing surface, (c) an end-point detection port (15) extending through the body from the front surface to the back surface, and (d) a drainage channel (16) in fluid communication with the end-point detection port (15). The invention further provides a method of preparing such a polishing disk and a method of polishing a substrate with such a polishing disk.
Abstract:
A chemical-mechanical polishing device wherein an elastic member (16) disposed between a polishing pad (12) and a platen (14) has a hardness of 10 - 40 defined in JIS K6301 (A type) and a thickness of 5 - 30 mm. Further, the polishing process in damascene wiring formation is effected in two steps. The first polishing step uses the elastic member of above-mentioned quality, and the second polishing step uses a material whose hardness defined in JIS K6301 (A type) is 50 or more.
Abstract:
A wafer (30) is polished by relatively moving a polishing body and the wafer (30) while applying a load between the polishing body and the wafer (30), with a polishing agent interposed between the polishing body and the wafer (30). A first step polishes the wafer (30) by using a hard polishing pad (42) as the polishing body while pressing the wafer (30) against the polishing pad (42) by air pressure. A second step following the first step uses a soft polishing pad as the polishing body to polish the wafer (30). This reduces erosion, dishing, etc., and provides a polished surface having few microscratches, further improving the flatness.
Abstract:
An optical sensor (25) that includes a light source (35) and a detector (36) is located within a cavity (2) in a polishing pad (3) so as to face the surface (4) that is being polished. Light from the light source (35) is reflected from the surface (4) being polished and the detector (36) detects the reflected light. The electrical signal produced by the detector (36) is conducted to a hub (10) located at the central aperture (23) of the polishing pad (3). The disposable polishing pad (3) is removably connected, both mechanically, and electrically to the hub (10). The hub (10) contains electronic circuitry that is concerned with supplying power to the optical sensor (25) and with transmitting the electrical signal to a non-rotating station (9). The system permits continuous monitoring of an optical characteristic of a surface that is being polished, even while the polishing machine (1) is in operation, and permits the end point of the polishing process to be determined.