Patent application number | Description | Published |
20090284894 | Electrostatic chuck - In accordance with an embodiment of the invention, there is provided an electrostatic chuck comprising an electrode, and a surface layer activated by a voltage in the electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck. The surface layer includes a plurality of protrusions extending to a height above portions of the surface layer surrounding the protrusions to support the substrate upon the protrusions during electrostatic clamping of the substrate. The protrusions are substantially equally spaced across the surface layer as measured by a center to center distance between pairs of neighboring protrusions. | 11-19-2009 |
20120044609 | Electrostatic Chuck With Polymer Protrusions - In accordance with an embodiment of the invention, there is provided an electrostatic chuck. The electrostatic chuck comprises a surface layer activated by a voltage in an electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck. The surface layer includes a plurality of polymer protrusions and a charge control layer to which the plurality of polymer protrusions adhere, the plurality of polymer protrusions extending to a height above portions of the charge control layer surrounding the plurality of polymer protrusions to support the substrate upon the plurality of polymer protrusions during electrostatic clamping of the substrate. | 02-23-2012 |
20130070384 | High Surface Resistivity Electrostatic Chuck - In accordance with an embodiment of the invention, there is provided an electrostatic chuck. The electrostatic chuck comprises an electrode, and a surface layer activated by a voltage in the electrode to form an electric charge to electrostatically clamp a substrate to the electrostatic chuck, the surface layer including a charge control layer comprising a surface resistivity of greater than about 10 | 03-21-2013 |
20130120897 | Electrostatic Chuck with Photo-Patternable Soft Protrusion Contact Surface - In accordance with an embodiment of the invention, there is provided a soft protrusion structure for an electrostatic chuck, which offers a non-abrasive contact surface for wafers, workpieces or other substrates, while also having improved manufacturability and compatibility with grounded surface platen designs. The soft protrusion structure comprises a photo-patternable polymer. | 05-16-2013 |
20130155569 | High Conductivity Electrostatic Chuck - In accordance with an embodiment of the invention, there is provided an electrostatic chuck comprising a conductive path covering at least a portion of a workpiece-contacting surface of a gas seal ring of the electrostatic chuck, the conductive path comprising at least a portion of an electrical path to ground; and a main field area of a workpiece-contacting surface of the electrostatic chuck comprising a surface resistivity in the range of from about 10 | 06-20-2013 |
20150294891 | Electrostatic Chuck With Photo-Patternable Soft Protrusion Contact Surface - In accordance with an embodiment of the invention, there is provided a soft protrusion structure for an electrostatic chuck, which offers a non-abrasive contact surface for wafers, workpieces or other substrates, while also having improved manufacturability and compatibility with grounded surface platen designs. The soft protrusion structure comprises a photo-patternable polymer. | 10-15-2015 |
20150380294 | Vacuum Chuck with Polymeric Embossments - A vacuum chuck with polymeric embossments is disclosed. The polymeric embossments are formed on the surface of a base substrate and are lapped to a flatness such that a wafer substrate clamped by the vacuum chuck has a peak to valley flatness that is less than a peak to valley flatness across the base substrate. Lapping of the polymeric embossments accommodates for variations in the flatness of the base substrate so long as the embossments are tall enough to stand over the peak to valley height variations in the base substrate. | 12-31-2015 |
20160103033 | Sensor With Protective Layer - A sensor comprises a sensor layer comprising a ceramic material; an adhesion layer comprising chromium, the adhesion layer adhered to one or more portions of a liquid facing surface of the sensor layer; and an isolator film comprising a polymer, the isolator film overlaying a liquid facing surface of the adhesion layer. The isolator film may be used to protect the sensor from corrosive and high temperature fluids, for example to protect the sensor from long term exposure to hot water between 85° C. and 100° C. | 04-14-2016 |