Perpendicular write head with laminated side shields

US8848316B2 · kind B2 · utility

Assignee

• Seagate Technology LLC · US

Inventors

• Mark Thomas Kief · Lakeville, US
• Alexandru Cazacu · Cambridge, GB
• Kaizhong Gao · North Oaks, US
• Mark Anthony Gubbins · Donegal, IE
• Ibro Tabakovic · Edina, US
• Christina Hutchinson · Apple Valley, US
• David Christopher Seets · Excelsior, US
• James Gary Wessel · Savage, US

Key dates

• Filing date: Sep 28, 2010
• Grant date: Sep 30, 2014
• Expiry date: Jan 14, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G11B5/858
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A perpendicular write head, the write head having an air bearing surface, the write head including a magnetic write pole, wherein at the air bearing surface, the write pole has a trailing side, a leading side that is opposite the trailing side, and first and second sides; side gaps, wherein the side gaps are proximate the write pole along the first and second side edges; and side shields proximate the side gaps, wherein the side shields have gap facing surfaces and include at least one set of alternating layers of magnetic and non-magnetic materials, wherein only one kind of material makes up the gap facing surfaces at the air bearing surfaces.