Patent ID: 8895324
Filing Date: 2014-11-25
Classification: C01B,C30B,F27B,F27D

Abstract:
1. A method of determining an amount of impurities that a candidate material contributes to high purity silicon during a heating process, said method comprising: determining an impurity content of the candidate material; determining an impurity content of the high purity silicon; providing the candidate material to be tested, wherein the candidate material is powder, particulate, a cylinder, or chunks, or any mixture thereof; encasing a sample of the high purity silicon in the candidate material; preventing impurities from a furnace material composition from reaching any portion of the sample encased in the candidate material, wherein the candidate material comprises a distinct material composition relative to the furnace material composition; heating the sample that is encased in the candidate material within a furnace formed of the furnace material composition; and determining a change in the impurity content of the high purity silicon caused by the candidate material after heating the sample that is encased in the candidate material, wherein the change is compared to the impurity content of the high purity silicon prior to heating the sample.