Narrow track thin film magnetic head suitable for high density recording and reproducing operations and fabrication method thereof wherein an air bearing surface has at least one groove containing a non-magnetic electrically conductive layer

A magnetic induction-type thin film recording head for effecting a write operation of data into a magnetic recording medium, comprising:

• an air bearing surface that interacts with a magnetic recording medium, said air bearing surface having a pair of grooves defining therebetween a track width of the magnetic induction-type thin film recording head;
• upper and lower magnetic poles overlaid one upon another with an electrical/magnetic insulating layer interposed therebetween to form a magnetic path;
• and
• a conductor coil disposed within the insulating layer for signal input and output;
• wherein each of said pair of grooves contains a nonmagnetic, electrically conductive layer.

A composite magnetic head comprising a magnetoresistive read head including a soft magnetic thin film having a magnetoresistive effect, and soft magnetic members at least partially surrounding said soft magnetic film through a non-magnetic insulation layer;

• an induction-type write head including magnetic poles formed in a moving direction of a magnetic recording medium in the proximity of said composite magnetic head, and a conductor crossing said magnetic poles;
• a substrate for supporting both of said read and write heads;
• and
• an air bearing surface via which said read and write heads interact with a magnetic recording medium, said air bearing surface having a pair of grooves defining therebetween a track width of the composite magnetic head;
• wherein read and write operations from and into a magnetic recording medium are effected by said read and write heads, respectively, of the air bearing surface interposed between said pair of grooves;
• and
• wherein each of said pair of grooves contains a non-magnetic, electrically conductive layer.

A magnetic thin film head for effecting at least a write operation of data into a magnetic recording medium, comprising:

• an air bearing surface that interacts with a magnetic recording medium, said air bearing surface having at least one groove defining a track width of the head;
• upper and lower magnetic poles overlaid one upon another with an electrical/magnetic insulating layer interposed therebetween to form a magnetic path;
• and
• a conductor coil disposed with in the insulating layer for signal input and output;
• wherein said at least one groove contains a nonmagnetic, electrically conductive layer.

A magnetic induction-type thin film recording head for effecting a write operation of data into a magnetic recording medium, comprising:

• an air bearing surface that interacts with a magnetic recording medium, said air bearing surface having at least one groove defining a track width of the magnetic induction-type thin film recording head;
• upper and lower magnetic poles overlaid one upon another with an electrical/magnetic insulating layer interposed therebetween to form a magnetic path;
• and
• a conductor coil disposed within the insulating layer for signal input and output;
• wherein said at least one groove contains a nonmagnetic, electrically conductive layer.

A composite magnetic head comprising a magnetoresistive head including a soft magnetic thin film having a magnetoresistive effect, and soft magnetic members at least partially surrounding said soft magnetic film through a non-magnetic insulation layer;

• an induction-type write head including magnetic poles formed in a moving direction of a magnetic recording medium in the proximity of said composite magnetic head, and a conductor crossing said magnetic poles;
• a substrate for supporting both of said read and write heads;
• and
• an air bearing surface via which said read and write heads interact with a magnetic recording medium, said air bearing surface having at least one groove defining a track width of the composite magnetic head;
• wherein read and write operations from and into a magnetic recording medium are effected by said read and write heads, respectively, of the air bearing surface adjacent said at least one groove;
• and
• wherein each of said at least one groove contains a non-magnetic, electrically conductive layer.

A magnetic thin film head for effecting at least a write operation of data into a magnetic recording medium, comprising:

• an air bearing surface that interacts with a magnetic recording medium, said air bearing surface having at least one groove defining a region where a magnetic flux leaks;
• upper and lower magnetic poles overlaid one upon another with an electrical/magnetic insulating layer interposed therebetween to form a magnetic path;
• and
• a conductor coil disposed within the insulating layer for signal input and output;
• wherein said region where a magnetic flux leaks is defined by the area of a projecting portion that projects from said at least one groove;
• wherein said at least one groove contains a nonmagnetic, electrically conductive layer.

A magnetic induction-type thin film recording head for effecting a write operation of data into a magnetic recording medium, comprising:

• an air bearing surface that interacts with a magnetic recording medium, said air bearing surface having at least one groove defining a region where a magnetic flux leaks;
• upper and lower magnetic poles overlaid one upon another with an electrical/magnetic insulating layer interposed therebetween to form a magnetic path;
• and
• a conductor coil disposed within the insulating layer for signal input and output;
• wherein said at least one groove contains a nonmagnetic, electrically conductive layer.

A composite magnetic head comprising a magnetoresistive head including a soft magnetic thin film having a magnetoresistive effect, and soft magnetic members at least partially surrounding said soft magnetic film through a non-magnetic insulation layer;

• an induction-type write head including magnetic poles formed in a moving direction of a magnetic recording medium in the proximity of said composite magnetic head, and a conductor crossing said magnetic poles;
• a substrate for supporting both of said read and write heads;
• and
• an air bearing surface via which said read and write heads interact with a magnetic recording medium, said air bearing surface having at least one groove defining a region where a magnetic flux leaks;
• wherein read and write operations from and into a magnetic recording medium are effected by said read and write heads, respectively, of the air bearing surface adjacent said at least one groove;
• and
• wherein each of said at least one groove contains a nonmagnetic, electrically conductive layer.