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:
Jul. 09, 2019
Filed:
Aug. 30, 2017
Spin Transfer Technologies, Inc., Fremont, CA (US);
Spin Memory, Inc., Fremont, CA (US);
Abstract
An advantageous write verify operation for bipolar memory devices is disclosed. The verify operation is performed under the same bias conditions as the write operation. Thus, the verify operation reduces disturb conditions caused when verify operation is performed in opposite bias to write operation. The advantageous write verify operation may be performed with control logic on source and bit lines. In another embodiment, the advantageous write operation is performed with mux coupled to control logic. The mux determines whether verify (0) or verify (1) operation should be performed based on data in a program latch. Moreover, the mux may select bias conditions for read operations based on a register bit. Trim circuits optionally provide guard banding and modify reference voltages for verify operations performed in opposite polarity to normal read operation.