Patent ID: 8622021
Filing Date: 2014-01-07
Classification: C04B,H01J,H01L

Abstract:
1. A plasma processing chamber comprising: a substrate holder for supporting a substrate within an interior of the processing chamber; a sintered silicon nitride component having an exposed surface adjacent the substrate, wherein the component consists of between about 80 weight % and about 95 weight % high purity silicon nitride and between about 5 weight % and about 20 weight % sintering aid, the sintering aid consisting of high purity silicon dioxide; a gas supply supplying process gas to the interior of the processing chamber; and an energy source supplying energy into the interior of the processing chamber and energizing the process gas into a plasma state for processing the substrate, wherein the component minimizes metallic contamination on a surface of the substrate to below 100×10 wherein the component has a total metallic contamination of below 100 ppm, and wherein the component has been subjected to uniaxial pressing or cold isostatic pressing followed by hot isostatic pressing.