Patent application number | Description | Published |
20080316652 | SIMULTANEOUS POLE-TIP AND SIDE SHIELD FABRICATION AND INTEGRATED ELG - A method for manufacturing a write pole for perpendicular magnetic recording for accurately defining a side shield throat height and write pole flare point. The method includes the formation of a magnetic structure that provides an electronic lapping guide as well as providing the structure for both the side shields and the write pole. The magnetic structure includes a write pole portion and first and second side shield portions. The side shields portions are magnetically connected with the write pole portion in a region in front of an intended air hearing surface plane (e.g. in the direction from which lapping will progress). The side shields portions are each separated from the write pole portion in a region behind the intended air bearing surface plane by notches that terminate at a desired location relative to the intended air bearing surface plane and which open up in a region behind the intended air bearing surface plane. | 12-25-2008 |
20090117407 | SHORT FLARE DEFINITION BY ADDITIVE PROCESS FOR PERPENDICULAR HEAD - A method for manufacturing a magnetic write head for perpendicular magnetic recording. The method includes forming a write pole, and then depositing a refill layer. A mask structure can be formed over the writ pole and refill layer, the mask structure being configured to define a stitched pole. An ion milling or reactive ion milling can then be performed to remove portions of the refill layer that are not protected by the mask structure. Then a magnetic material can be deposited to form a stitched write pole that defines a secondary flare point. The stitched pole can also be self aligned with an electrical lapping guide in order to accurately locate the front edge of the secondary flare point relative to the air bearing surface of the write head. | 05-07-2009 |
20090166183 | METHOD OF MANUFACTURING A PERPENDICULAR MAGNETIC WRITE HEAD WITH STEPPED TRAILING MAGNETIC SHIELD USING COLLIMATED SPUTTER DEPOSITION - A method for manufacturing a magnetic write head having a stepped trailing shield. The stepped trailing shield is formed by forming a non-magnetic bump over a write pole prior to electroplating a wrap-around magnetic shield. This bump is formed by constructing a mask having an opening configured to define the non-magnetic bump. A magnetic material is then sputter deposited. In order to decrease deposition of the magnetic material on the sides of the mask, a collimator is used to align the deposited material along a plane substantially parallel with an air bearing surface plane. This collimation of the deposited magnetic material greatly facilitates liftoff, and more importantly prevents the formation of fences which would otherwise have to be removed by a harsh, aggressive process. | 07-02-2009 |
20090168242 | METHOD FOR MANUFACTURING A PERPENDICULAR MAGNETIC WRITE POLE HAVING A LARGE BEVEL ANGLE - A method for manufacturing a magnetic write head for perpendicular magnetic recording, the write head having a write pole with an increased bevel (taper) angle. The write pole is constructed by forming a mask structure over a magnetic write pole material, and then performing a combination of sweeping or rotation with static (non-rotating, non-sweeping) ion milling at an angle relative to normal. The ion milling is performed while moving the wafer laterally within the ion milling tool to ensure that the ion milling is performed uniformly across the wafer during static milling. | 07-02-2009 |
20090168257 | INDEPENDENT SIDE SHIELD AND TOP SHIELD THROAT HEIGHT CONTROL FOR HIGH LINEAR DENSITY WRAP AROUND SHIELD WRITE HEAD - A magnetic write head for perpendicular magnetic recording. The magnetic write head includes a write pole having a pole tip region and a flared region. The write pole also has a trailing, wrap-around magnetic shield that is separated from the sides of the write pole by a non-magnetic side gap layer. The write head is formed such that the side gap spacing is larger in the flared region than in the pole tip region. This varying gap spacing can be formed by depositing a non-magnetic material using a collimated sputter deposition aligned substantially perpendicular to the air bearing surface. This collimated sputtering deposits the non-magnetic material more readily on the sides of the write pole in the flared region than in the pole tip region. | 07-02-2009 |
20100155366 | METHOD FOR CREATING A MAGNETIC WRITE POLE HAVING A STEPPED PERPENDICULAR POLE VIA CMP-ASSISTED LIFTOFF - A method for manufacturing a magnetic write head having a stepped, recessed, high magnetic moment pole connected with a write pole. The stepped pole structure helps to channel magnetic flux to the write pole without leaking write field to the magnetic medium. This allows the write head to maintain a high write field strength at very small bit sizes. The method includes depositing a dielectric layer and a first CMP layer over substrate that can include a magnetic shaping layer. A mask is formed over the dielectric layer, the mask having an opening to define the stepped pole structure. The image of the mask is transferred into the dielectric layer. A high magnetic moment material is deposited and a chemical mechanical polishing is performed to planarize the magnetic material and dielectric layer. | 06-24-2010 |
20100163422 | ASSISTED DEPOSITION, NARROW TRENCH DAMASCENE PROCESS FOR MANUFACTURING A WRITE POLE OF A MAGNETIC WRITE HEAD - A method for forming a magnetic write head using a damascene process that does not form voids in the magnetic structure. An opening is formed in an alumina layer, the opening being configured to define a trench. Then a first layer of magnetic material is deposited into the trench. A CMP process is then performed to remove any voids that have formed in the first magnetic layer. Then a second layer of magnetic material is deposited over the first layer of magnetic material. In another embodiment of the invention, a opening is formed in the alumina layer, and a first layer of magnetic material is electroplated into the opening. A thin layer of non-magnetic material is then deposited, and a second layer of magnetic material is deposited over the thin layer of non-magnetic material. The thin layer of alumina advantageously provides a laminate structure that avoids data erasure. | 07-01-2010 |
20120107645 | METHOD FOR MANUFACTURING A SHORT FLARE DEFINITION BY ADDITIVE PROCESS FOR PERPENDICULAR HEAD - A method for manufacturing a magnetic write head for perpendicular magnetic recording. The method includes forming a write pole, and then depositing a refill layer. A mask structure can be formed over the writ pole and refill layer, the mask structure being configured to define a stitched pole. An ion milling or reactive ion milling can then be performed to remove portions of the refill layer that are not protected by the mask structure. Then a magnetic material can be deposited to form a stitched write pole that defines a secondary flare point. The stitched pole can also be self aligned with an electrical lapping guide in order to accurately locate the front edge of the secondary flare point relative to the air bearing surface of the write head. | 05-03-2012 |