Patent ID: 7189657

Claim:
A method of abruptly reducing a probability of organic substances of low molecular weight adsorbing onto a surface of a semiconductor substrate during processing, and of maintaining a highly clean surface of the semiconductor substrate, prior to a subsequent processing step, in a condition in which the surface is not deposited with the organic substances of low molecular weight; the method comprising sequentially: (a) initially depositing and coating the highly clean surface of the semiconductor substrate with a high-molecular-weight organic substance comprising chemical protection, during washing or immediately after the highly clean surface of the semiconductor substrate has been generated; wherein the high-molecular-weight organic substance does not easily evaporate from the surface even when the substrate is left to stand at ordinary temperature, and boils at a high temperature of the subsequent processing step that is greater than or equal to 233° C.; and (b) removing the high-molecular-weight organic substance by boiling at the high temperature of the subsequent processing step; whereby a surface condition of the semiconductor substrate after a clean surface is obtained is maintained without requiring a mini-environment or a method of organic substance removal.