Method for providing a magnetic recording transducer including a wraparound shield and a rectangular pole

A method for fabricating a magnetic transducer having an air-bearing surface location (ABS location) corresponding to an air-bearing surface (ABS), the method comprising:

• providing an etch stop layer including Ta;
• providing a nonmagnetic etchable layer on the etch stop layer, the nonmagnetic etchable layer including SiO2, the nonmagnetic etchable layer terminating at least twenty nanometers and not more than sixty nanometers from the ABS location;
• providing a side shield layer residing between the ABS location and the etch stop layer and between the ABS location and the etchable layer, the side shield layer including NiFe;
• removing a first portion of the side shield layer and first portion of the nonmagnetic etchable layer using a first removal process, thereby forming a first portion of a pole trench, the first portion of the pole trench having a bottom and a top wider than the bottom in the side shield layer, the first removal process including a first reactive ion etch utilizing a NiFe etch chemistry;
• removing at least a second portion of the nonmagnetic etchable layer using a second removal process, thereby forming the pole trench, the pole trench having a pole trench bottom and a pole trench top wider than the pole trench bottom in the side shield layer and a substantially perpendicular sidewalls in the nonmagnetic etchable layer, the second removal process including a second reactive ion etch utilizing SiO2 etch chemistry;
• providing a nonmagnetic side gap layer, at least a portion of the nonmagnetic side gap layer residing in the pole trench, a remaining portion of the pole trench having a location and profile for a pole;
• forming the pole, at least a portion of the pole residing in the remaining portion of the pole trench;
• providing a write gap, at least a portion of the write gap being on the pole;
• and
• providing a trailing shield, at least a portion of the trailing shield being on the write gap.