IP Library Granted Patent US 8,488,272
Granted Patent B1
US 8,488,272 · App. 13/433,587 · Granted Jul 16, 2013

Magnetic recording transducer having side shields

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,488,272
App. No.
13/433,587
Granted
Jul 16, 2013
Kind
B1
Abstract

A magnetic recording transducer includes a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS). The magnetic recording transducer further includes at least one coil having a coil front distal from the ABS, and at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front.

Claims (31)

1. A magnetic recording transducer comprising:

a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS);

at least one coil having a coil front distal from the ABS;

at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front; and

wherein the at least one side shield includes a side shield bottom, the main pole includes a main pole bottom, and wherein the side shield bottom is not further from the underlayer than the main pole bottom.

2. The magnetic recording transducer of claim 1 wherein the at least one side shield includes at least one canted corner.

3. The magnetic recording transducer of claim 1 wherein the main pole further includes:

at least one magnetic layer having a bottom and a plurality of sides; and

at least one nonmagnetic layer, the at least one nonmagnetic layer substantially surrounding bottom and the plurality of sides of the magnetic layer.

4. The magnetic recording transducer of claim 1 wherein the main pole further includes at least one bevel.

5. The magnetic recording transducer of claim 1 further including a planarization stop layer residing between the main pole at the at least one side shield.

6. The magnetic recording transducer of claim 1 further comprising:

a write gap, at least a portion of the write gap residing on the main pole; and

a top shield, at least a portion of the top shield residing on the main pole.

7. The magnetic recording transducer of claim 2 A magnetic recording transducer comprising:

a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS);

at least one coil having a coil front distal from the ABS;

at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front;

at least one nonmagnetic layer substantially surrounding a portion of the main pole; and

wherein the at least one side shield includes at least one canted corner and wherein the at least one nonmagnetic layer further includes at least one of a planarization stop layer and a nonmagnetic track width adjustment layer.

8. A magnetic recording transducer comprising:

a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS);

at least one coil having a coil front distal from the ABS;

at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front; and

wherein the at least one side shield includes a first side forming a first angle with the underlayer, the main pole includes a second side forming a second angle with the underlayer, the first angle and the second angle being substantially equal.

9. A disk drive comprising:

a slider including a magnetic transducer, the magnetic transducer including

a main pole including a nose portion, the nose portion terminating at an air-bearing surface (ABS);

at least one coil having a coil front distal from the ABS;

at least one side shield, the at least one side shield extending from at the ABS to not further than the coil front; and

at least one nonmagnetic layer substantially surrounding a portion of the main pole, the at least one nonmagnetic layer further including at least one of a planarization stop layer and a nonmagnetic track width adjustment layer.

Assignments (8)
PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 067045/0156 →
PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT Recorded Aug 21, 2023
From: WESTERN DIGITAL TECHNOLOGIES, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 064715/0001 →
RELEASE OF SECURITY INTEREST AT REEL 038710 FRAME 0845 Recorded Feb 8, 2022
From: JPMORGAN CHASE BANK, N.A.
To: WESTERN DIGITAL (FREMONT), LLC; WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 058965/0445 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 19, 2019
From: WESTERN DIGITAL (FREMONT), LLC
To: WESTERN DIGITAL TECHNOLOGIES, INC.
Reel/Frame 050450/0582 →
RELEASE OF SECURITY INTEREST Recorded Mar 5, 2018
From: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
To: WESTERN DIGITAL (FREMONT), LLC
Reel/Frame 045501/0158 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WESTERN DIGITAL (FREMONT), LLC
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038710/0845 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WESTERN DIGITAL (FREMONT), LLC
To: U.S. BANK NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 038744/0675 →
SECURITY AGREEMENT Recorded May 16, 2016
From: WESTERN DIGITAL (FREMONT), LLC
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 038744/0755 →