US 9,812,155 B1
Method and system for fabricating high junction angle read sensors
Anup Ghosh Roy, Fremont, CA (US); Guanxiong Li, Fremont, CA (US); Daniele Mauri, San Jose, CA (US); Ming Mao, Dublin, CA (US); Goncalo Albuquerque, San Jose, CA (US); and Savas Gider, San Jose, CA (US)
Assigned to WESTERN DIGITAL (FREMONT), LLC, Fremont, CA (US)
Filed by Western Digital (Fremont), LLC, Fremont, CA (US)
Filed on Nov. 23, 2015, as Appl. No. 14/949,155.
Int. Cl. G11B 5/39 (2006.01); G11B 5/127 (2006.01); G11B 5/33 (2006.01)
CPC G11B 5/1272 (2013.01) [G11B 5/33 (2013.01); G11B 5/3906 (2013.01); G11B 5/3909 (2013.01); G11B 5/3912 (2013.01); G11B 5/3932 (2013.01); G11B 2005/3996 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A magnetic read apparatus having an air-bearing surface (ABS), the magnetic read apparatus comprising:
a read sensor having a bottom, a top, and a plurality of sides, the plurality of sides forming at least one junction angle with the bottom of the read sensor, at least one junction angle being at least seventy-five degrees and not more than one hundred and five degrees, the read sensor having a track width in a cross track direction of not more than five nanometers; and
at least one soft side magnetic bias structure adjacent to the plurality of sides of the read sensor and separated from the plurality of sides by a nonmagnetic layer, the at least one soft side magnetic bias structure comprising a side shielding material having a saturation magnetization and an exchange length, at least one of the saturation magnetization being greater than 800 emu/cm3 and the exchange length being less than five nanometers, each of the at least one soft side magnetic bias structures comprising a first layer and a second layer adjoining the first layer, wherein the second layer comprises a first surface that is substantially parallel to the bottom of the read sensor and a second surface that is substantially parallel to the plurality of sides of the read sensor in a down track direction that is perpendicular to the cross-track direction, and wherein the second surface is directly between the second layer and the first layer such that the second layer is separated from the nonmagnetic layer by a portion of the first layer.