Patent ID: 7108771

Claim:
A process for improving delivery reproducibility of a cyclosiloxane precursor to a chemical vapor deposition reactor and reducing water content in the cyclosiloxane precursor, the process comprising the steps of: (a) providing a cyclosiloxane precursor; (b) treating and contacting the cyclosiloxane precursor with at least one adsorbent bed material that has an affinity for water and at least one impurity selected from the group consisting of acidic and basic impurities from said cyclosiloxane precursor for a sufficient time to reduce the water and impurities in the cyclosiloxane precursor, (c) separating the cyclosiloxane precursor from the at least one adsorbent bed material, to produce a purified cyclosiloxane precursor, wherein the water content is less than 20 ppm; (d) vaporizing the purified cyclosiloxane precursor; and (e) delivering vapor of the purified cyclosiloxane precursor to said chemical vapor deposition reactor, wherein treatment of the cyclosiloxane precursor functions to prevent or minimize premature polymerization of the cyclosiloxane precursor in the chemical vapor deposition reactor and associated delivery lines and improves delivery reproducibility of the cyclosiloxane precursor.