NOVELTY - The assembly (214) has a window body (290) including a central translucent portion (254) adapted to pass radiant heat (268) emitted from a radiant heat lamp through the central translucent portion. A surface treated portion is arranged about the central translucent portion and arranged on one of inner and outer surfaces of the body. The surface treated portion is adapted to minimize total internal reflections of the radiant heat emitted from the radiant heat lamp. Multiple molded seals (280) are arranged proximate an outer edge of the body and one of the surfaces of the body.    USE - Window assembly for use in modules such as deposition or doping modules, of an inline substrate processing tool (claimed) i.e. indexed inline substrate processing tool, for epitaxial silicon deposition in solar cell fabrication applications. Can also be used for a standalone substrate processing tool and a cluster substrate processing tool.    ADVANTAGE - The assembly provides simple and low cost windows and seals to allow hermetic sealing at elevated temperatures. The assembly allows a substrate processing tool to provide simple automation, low cost and relatively simple reactor design with high throughput and process quality, and scale-up of window size at significantly lower cost. The assembly ensures simple manufacturability since basic design components are based on flat plates, and energy and cost efficient usage of the processing tool to perform multi-step substrate processes. The assembly can optimize flow fields within a processing system for specific application so as to minimize waste and purge gas requirements and maximize precursor utilization. The assembly can preload substrates on carriers, thus improving flexibility of system configuration. The assembly utilizes bead blasting to form a bead blasted portion so as to minimize amount of machining required to fabricate the window assembly and avoid the need to weld opaque material to translucent material, thus reducing manufacturing cost and producing less manufacturing variability.    DETAILED DESCRIPTION - The molded seals are molded fluorocarbon or PTFE seals and rectangular gaskets or circular O-rings. The central translucent portion is fabricated from clear flat quartz (SiO2) and material that is translucent to IR radiation. An INDEPENDENT CLAIM is also included for an inline substrate processing tool.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional end view of a window assembly for use in modules of an inline substrate processing tool.    Window assembly (214)    Central translucent portion (254)    Radiant heat (268)    Molded seals (280)    Window body (290)