Patent ID: 8094418

Claim:
A merged read/write magnetic head comprising: (a) a first stack of layers formed on a substrate and comprising a read head, said first stack of layers includes: (1) a first insulation layer formed on the substrate (2) a bottom shield layer on the first insulation layer; (3) a gap layer on the bottom shield layer wherein said gap layer has a sensor formed therein and the sensor is disposed along an air bearing surface (ABS); (4) a first dynamic fly (DFH) heater formed in the first insulation layer, or in said gap layer, or in a second insulation layer formed between the gap layer and a top shield within the read head, and proximate to the sensor wherein the first DFH heater is connected to a preamplifier or PCB board that provides a power to activate the first DFH heater that causes the sensor to protrude toward a magnetic recording disk which is positioned a certain distance from the ABS during a read or write mode, (b) a second stack of layers formed on the first stack of layers and comprising a write head wherein the second stack of layers includes: (1) a third insulation layer formed between the top shield and a main pole layer and with a first end at the ABS; (2) the main pole layer formed on the third insulation layer and with a write pole tip at the ABS; and (3) a second DFH heater formed in the third insulation layer, or in a fourth insulation layer that adjoins the ABS between the top shield and the main pole layer within the write head and proximate to the write pole tip wherein the second DFH heater is connected to a preamplifier or PCB board that provides a power to activate the second DFH heater and causes the write pole tip to protrude toward said magnetic recording disk during a read or write mode.