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:
Aug. 25, 2015
Filed:
Oct. 11, 2012
Daniel H. Morris, Pittsburgh, PA (US);
David M. Bromberg, Pittsburgh, PA (US);
Lawrence T. Pileggi, Pittsburgh, PA (US);
Jiam-gang (Jimmy) Zhu, Pittsburgh, PA (US);
Daniel H. Morris, Pittsburgh, PA (US);
David M. Bromberg, Pittsburgh, PA (US);
Lawrence T. Pileggi, Pittsburgh, PA (US);
Jiam-Gang (Jimmy) Zhu, Pittsburgh, PA (US);
Iron City Integrated Circuits, Pittsburgh, PA (US);
Abstract
A nonvolatile alternative to DRAM or Flash is disclosed. It involves a new 'magnetic shift register' that avoids the bit annihilation problem that plagues magnetic racetrack memories. Using this new 'chainlink memory' approach, one avoids the annihilation problem inherent in racetrack memory by breaking up the racetrack into magnetically coupled links, where each link preferably handles one bit exclusively. Depending upon the implementation, the “bit” can be, for example, the magnetization of a link, presence or absence of a domain wall, or the polarity of a domain wall. Numerous examples and applications of this new chainlink technology are disclosed.