Patent ID: 8526139
Filing Date: 2013-09-03
Classification: G11B

Abstract:
1. A magnetic head including a magnetic recording element and only one electrothermal body which generates heat by turning on electricity, the magnetic head comprising: the magnetic recording element comprising: the only one electrothermal body located below a second region of the air-bearing surface between the first magnetic pole and the second magnetic pole, wherein the only one electrothermal body is located between the second magnetic pole and all coils, wherein said second region is included in said first region, and wherein heat deformation by heat generation of the only one electrothermal body located between the second magnetic pole and all coils causes the air-bearing surface to be displaced to the side with respect to the magnetic disk, the heat deformation of the only one electrothermal body located above the second magnetic pole and below all coils caused by providing electricity to the only one electrothermal body located between the second magnetic pole and all coils, wherein an area of the second region is smaller than an area of the first region, and wherein the electrothermal body located between the second magnetic pole and all coils comprises a resistance line, the resistance line folded alternately in opposite directions; a heater immobility line along which a position of a positive pressure generation surface of the magnetic head does not vary when electricity is distributed to a heater portion of the magnetic head, wherein the heater portion of the magnetic head has a rectangular outline including a resistance line folded alternately in opposite directions; and a write immobility line along which a position of the positive pressure generation surface does not vary at a time of recording.