Patent ID: 7327532
Filing Date: 2008-02-05
Classification: G11B

Abstract:
1. A magnetic write head comprising: an ABS, a top pole having a first top surface and a first thickness, and a bottom pole, said poles being separated by a write gap; said top pole including an end piece having a top surface that is coplanar with said first top surface and a thickness that exceeds said first thickness by between about 0.1 and 0.5 microns, said end piece being disposed to lie directly above said bottom pole and extending horizontally from the ABS for between about 0.3 and 1 microns; said bottom pole further comprising front and rear sections resting on a flat layer having an outer edge; said front section further comprising: trapezoidal front and rear vertical walls, separated by a second thickness, and an upper flat area; centrally located on said upper flat area, a flux concentrator that extends upwards towards said end piece, thereby defining said write gap, and having an upper surface; said rear section further comprising: a rectangular prism having vertical inner and outer walls with said inner wall symmetrically contacting said trapezoidal rear wall and said outer wall extending to said flat layer outer edge; said rectangular prism having an upper surface that is lower than said flux concentrator upper surface by less than about 0.3 microns and higher than said upper flat area by less than about 0.3 microns; connected to said flux concentrator on said rectangular prism upper surface, a flux extender whose upper surface is coplanar with said flux concentrator upper surface, and that extends therefrom for a distance; said flux extender being shaped so that it does not overlap said top pole and said top pole does not overlap said flux extender except where said top pole extends beyond said rectangular prism upper surface; and said end piece, said flux concentrator, and said trapezoidal front wall all having surfaces that form part of said ABS.