The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2001
Filed:
Nov. 01, 1999
United Microelectronics Corp., Hsin-Chu, TW;
Abstract
The present invention relates to a method of forming a level silicon oxide layer on a semiconductor wafer. The semiconductor wafer comprises a substrate having a first region containing no silicon nitride on its surface and a second region which is higher than the first region and contains a silicon nitride layer on its surface. The method comprises performing a cleaning process on the semiconductor wafer with an alkaline solution to uniform the deposition rate over the surface of the first region; and performing a deposition process employing ozone as a reactive gas with a flow capacity of 80-200 g/L to form a silicon oxide layer above the first and second regions wherein the deposition rate of the silicon oxide layer on the first region is higher than that on the second region and the silicon oxide layer above the first region is leveled with that above the second region after a predetermined period of time.