Magnetoresistive

Subclass of:

428 - Stock material or miscellaneous articles

428800000 - MAGNETIC RECORDING COMPONENT OR STOCK

428810000 - Magnetic head

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application number	Description	Number of patent applications / Date published
428811200	Multilayer	54
428811100	Having tunnel junction effect	35
428811400	Single film	1
20090110960	Method of etching magnetoresistive film by using a plurality of metal hard masks - This etching method comprises the steps of forming first and second hard masks made of materials different from each other successively on a magnetoresistive film; forming a resist having a lower face opposing a front face of the second hard mask, a space being interposed between the front face and lower face; dry-etching the second hard mask by using the resist as a mask; etching the first hard mask by using the etched second hard mask; and etching the magnetoresistive film by using the first hard mask.	04-30-2009

Entries
Document	Title	Date
20080226947	MAGNETO-RESISTANCE EFFECT ELEMENT HAVING FREE LAYER INCLUDING MAGNETOSTRICTION REDUCTION LAYER AND THIN-FILM MAGNETIC HEAD - A magnetoresistance effect element includes a pinned layer having a fixed magnetization direction, a free layer having a magnetization direction variable depending on an external magnetic field, and a nonmagnetic spacer layer disposed between the pinned layer and the free layer. The free layer includes a Heusler alloy layer and a magnetostriction reduction layer made of a 4th group element, a 5th group element, or a 6th group element.	09-18-2008
20090029188	METHOD FOR EARLY DETECTION OF MAGNETIC HEAD DEGRADATION DUE TO CARBON OVERCOAT WEAR - A method for detecting an impending failure of a disk drive system. The method includes monitoring a signal from a magnetoresistive sensor for the presence of a negative signal spike. A negative signal spike can indicate that the carbon overcoat of the magnetic medium has been locally worn off. The resulting localized absence of carbon overcoat causes the magnetoresistive sensor to short to the magnetic medium. This causes a short, abrupt drop in voltage, which can be used as evidence of the localized absence of the carbon overcoat. If such a negative signal spike is detected, the user can be notified of an impending system failure. In addition to, or in lieu of, notifying the user of the impending system failure, the system can be automatically de-activated to prevent data loss and/or further damage to the recording system.	01-29-2009