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:
Sep. 14, 2004
Filed:
Oct. 13, 1998
J. Dennis Keller, Boise, ID (US);
Roger R. Lee, Boise, ID (US);
Micron Technology, Inc., Boise, ID (US);
Abstract
Floating gate transistors and methods of forming the same are described. In one implementation, a floating gate is formed over a substrate. The floating gate has an inner first portion and an outer second portion. Conductivity enhancing impurity is provided in the inner first portion to a greater concentration than conductivity enhancing impurity in the outer second portion. In another implementation, the floating gate is formed from a first layer of conductively doped semiconductive material and a second layer of substantially undoped semiconductive material. In another implementation, the floating gate is formed from a first material having a first average grain size and a second material having a second average grain size which is larger than the first average grain size.