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. 05, 1998
Filed:
Jan. 13, 1997
Arjun Kumar Kantimahanti, Singapore, SG;
Chivukula Subrahmanyam, Singapore, SG;
Mei Sheng Zhou, Singapore, SG;
Chartered Semiconductor Manufacturing Ltd., Singapore, SG;
Abstract
A method is described for forming capacitors in integrated circuits by making the capacitors concurrently with the fabrication of the interconnection wiring levels. A single additional photolithographic step and two depositions are required to form capacitors within each wiring level. A key feature of the invention is the use of an etch-stop to protect the capacitor dielectric during contact or via etching. The storage plates of the capacitor are formed from two successive conductor levels which can include polysilicon levels as well. The process is particularly suited to the manufacture of logic circuits and can be used effectively in MOSFET, bipolar and BiCMOS processes.