Patent · US Active

Optimizing a current distribution in write heads for efficient energy-assisted magnetic recording

US12094497B1 · kind B1 · utility

0Cited by

5References

20Claims

0Family size

Assignee

Headway Technologies, Inc. · US

Inventors

Shehrin Sayed · Fremont, US
Wenyu Chen · San Jose, US
Yue Liu · Plymouth, US
Kowang Liu · Fremont, US
Tetsuya Roppongi · Kawasaki, JP
Haowen REN · Shanghai, CN
Yuhui Tang · Milpitas, US
Moris Dovek · San Jose, US
Wenjie Chen · Lo Wu, CN

Key dates

Filing date	Aug 30, 2023
Grant date	Sep 17, 2024
Priority date	—
Expiry date	Aug 30, 2043

Classification

Technology area (CPC G)Physics
CPC primaryG11B2005/3996
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The present embodiments can generally provide a magnetic write head structure with optimized gap current distribution to maximize the current-assisted areal density capacity (ADC) gain in hard-disk-drive storage devices. In a first example embodiment, a non-dual-write-shield (nDWS) write head can include a main pole (MP), a trailing shield (TS), and a write gap (WG) disposed between the MP and the TS. The write head can also include a side shield (SS), a leading shield (LS), and a write shield (WS). The write head can include a side gap (SG) between the MP and the SS on both sides of the MP tip, and a leading gap (LG) between the MP and the LS. The write head can also include a coil wrapped around the MP through a PP3 shield that is configured to direct a time-dependent write current to saturate magnetization of the MP.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.