Additive gap process to define trailing and side shield gap...

Metal working – Method of mechanical manufacture – Electrical device making

Reexamination Certificate

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C029S603110, C029S603130, C029S603180, C029S605000, C029S606000, C360S121000, C360S122000, C360S317000, C451S005000, C451S041000

Reexamination Certificate

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07467461

ABSTRACT:
A method of manufacturing a magnetic write head for perpendicular magnetic recording. The method includes the formation of a write pole over a substrate. A non-magnetic side gap layer is deposited and an ion milling is used to remove a portion of the substrate to lower the floor of the substrate. A sacrificial fill layer can then be deposited. A chemical mechanical polishing process can be used to remove the mask structure remaining as a remnant of the formation of the write pole, and then the sacrificial fill layer can be removed. A non-magnetic, electrically conductive material can be deposited to form a tailing gap, an a magnetic material can then be deposited to form a wrap around trailing shield.

REFERENCES:
patent: 7002778 (2006-02-01), Yazawa
patent: 7124498 (2006-10-01), Sato
patent: 2004/0161636 (2004-08-01), Hujanen et al.
patent: 2004/0184190 (2004-09-01), Han et al.
patent: 2005/0068665 (2005-03-01), Le et al.
patent: 2005/0068669 (2005-03-01), Hsu et al.
patent: 2005/0083605 (2005-04-01), Hu et al.
patent: 2005/0243463 (2005-11-01), Fontana et al.
patent: 2005/0259355 (2005-11-01), Gao et al.

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