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:
Nov. 23, 2004
Filed:
Dec. 30, 2002
Applicant:
Inventors:
Michael Wise, Lagrangeville, NY (US);
Andreas Knorr, Austin, TX (US);
Assignee:
Infineon Technologies AG, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 2/1762 ;
U.S. Cl.
CPC ...
H01L 2/1762 ;
Abstract
A method of forming deep isolation trenches in the fabrication of ICs is disclosed. The substrate is prepared with deep isolation trenches. The isolation trenches are partially filled with a first dielectric material. An etch mask layer is deposited on the substrate and used to remove excess first dielectric material on the surface of the substrate. The isolation trenches are then completely filled with a second dielectric material. Excess second dielectric material is then removed from the surface of the substrate.