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. 01, 2022
Filed:
Jul. 30, 2021
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Hirofumi Suto, Ota, JP;
Tazumi Nagasawa, Yokohama, JP;
Masayuki Takagishi, Kunitachi, JP;
Naoyuki Narita, Funabashi, JP;
Tomoyuki Maeda, Kawasaki, JP;
KABUSHIKI KAISHA TOSHIBA, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Abstract
According to one embodiment, an evaluation method of a magnetic head is disclosed. The method can include acquiring an electrical signal obtained from a magnetic element when supplying a first alternating current to a coil of a magnetic head and supplying a second current to the magnetic element. The magnetic head includes a first magnetic pole, a second magnetic pole, and a coil. The magnetic element is provided between the first magnetic pole and the second magnetic pole, and includes a first magnetic layer. The method can include detecting a time required for a change of an electrical resistance of the magnetic element based on a time when a polarity of the first alternating current is reversed based on the electrical signal.