Patent ID: 9047885
Filing Date: 2015-06-02
Classification: G11B

Abstract:
1. A perpendicular magnetic recording head comprising: a main pole having an air-bearing surface in an inverted trapezoidal shape; a trailing shield situated at a trailing side of the main pole; a side shield situated at both sides in a cross track direction of the main pole; and a leading end gap situated between opposing edges of a leading portion of the side shield, wherein the leading end gap extends from a leading side end of the main pole in a leading track direction to a first vertex of each opposing edge of the leading portion of the side shield, wherein each opposing edge of the leading portion of the side shield are opposite to a corresponding opposing edge of the side shield on the other side of the main pole in the cross track direction, wherein the first vertex of each opposing edge of the leading portion of the side shield is defined where two portions of the respective edge intersect at a leading side end of the side shield, wherein a width in the cross track direction between the opposing edges of the leading portion of the side shield is at a minimum at the first vertices, wherein a gap positioned on either side of the main pole in the cross track direction between the main pole and the side shield has a constant width in the cross track direction for a thickness of the main pole in a track direction, wherein the leading portion of the side shield further comprises second vertices where two portions of each respective opposing edge of the leading portion intersect, each second vertex being positioned farther from the leading side end of the main pole in the track direction than the first vertex of the respective opposing edge, and wherein a distance Ls between the leading side end of the main pole and the first vertex of each opposing edge of the side shield, and a distance Gs between the main pole and the side shield in the cross track direction satisfy Ls>1.5xGs.