Patent ID: 8125732

Claim:
A main pole layer with a trailing edge taper in a PMR writer, comprising: (a) a lower section formed on a substrate, said lower section has a first thickness and a trapezoid or triangle shape in a first write pole portion adjoining an air bearing surface (ABS) and extends to a back side of a first yoke portion and includes: (1) a side of the first write pole portion at the ABS that is part of a write pole tip; (2) a bottom surface contacting the substrate and including a leading edge having a first width on the write pole tip; (3) a sidewall that has a first bevel angle with respect to a plane formed perpendicular to the substrate and intersecting said sidewall; (4) a top surface that contacts a middle section of the main pole layer and connects to said bottom surface by said sidewall; and (5) a first back side part of the first write pole portion opposite the ABS that adjoins the first yoke portion at a neck height distance from the ABS; (b) a middle section formed on the lower section, said middle section has a rectangular shape at the ABS and extends to a back side of a second yoke portion and includes: (1) a side of a second write pole portion at the ABS that is part of the write pole tip and has a second thickness; (2) a bottom surface that interfaces with the top surface of the lower section; (3) a sidewall that is essentially vertical with respect to the substrate and connects with a top edge of the sidewall of the bottom section; (4) a tapered top surface that extends from a trailing edge having a pole width at the ABS to a top edge of a second back side part of the second write pole portion, said second back side part has a thickness greater than said second thickness; and (5) a top surface that is parallel to the substrate and forms an interface with a top section; (c) a top section contacting the middle section in the second yoke portion and along the back side of the second write pole portion, said top section includes: (1) a tapered side that extends from the tapered top surface of the middle section to a top edge of a third write pole portion that adjoins a top surface of a third yoke portion; (2) the top surface of the third yoke portion that extends from the tapered side to a back side of the third yoke portion; (3) a sidewall that has a second bevel angle with respect to a plane that is an extension of the middle section sidewall, said sidewall connects the top surface of the third yoke portion with an upper edge of the sidewall of the middle section; and (4) a bottom surface that interfaces with the top surface of the middle section.