公开(公告)号：FR2395580A1

公开(公告)日：1979-01-19

申请号：FR7816945

申请日：1978-05-29

Applicant: IBM

Inventor： HEMPSTEAD ROBERT D ,  KRONGELB SOL ,  NEPELA DANIEL A ,  THOMPSON DAVID A ,  VALSTYN ERICH P

IPC: G11B5/31 ,  G11B5/39 ,  H01F10/00 ,  H01F10/08 ,  H01F10/12 ,  H01F10/18 ,  H01F10/32 ,  H01F41/14 ,  H01L43/08

公开(公告)号：FR2342547A1

公开(公告)日：1977-09-23

申请号：FR7700649

申请日：1977-01-05

Applicant: IBM

Inventor： AINSLIE NORMAN G ,  HEMPSTEAD ROBERT D ,  TAN SWIE-IN ,  VALSTYN ERICH P

IPC: C22C38/00 ,  C23C14/40 ,  G11B5/147 ,  G11B5/31 ,  H01F10/14 ,  H01F41/14 ,  H01F41/18 ,  H01F10/02 ,  G11B5/62

Abstract: Iron-silicon is sputtered onto a substrate to be used for a magnetic recording head from a target containing 4% to 7% of silicon with a substrate bias between -2.5 and -60 volts, anode-cathode spacing of about 1/2 to about 2 inches, a deposition rate of greater than 150A/min, a substrate temperature above 250 DEG C, an argon pressure above 10 microns, and a single film thickness greater than 0.4 micron, a laminated film thickness greater than 0.05 micron, and R.F. input power above 8 watts/in2.

公开(公告)号：FR2332587A1

公开(公告)日：1977-06-17

申请号：FR7631436

申请日：1976-10-11

Applicant: IBM

Inventor： KRONGELB SOL ,  MAYADAS ASHOK F ,  BAJOREL CHRISTOPHER H ,  HEMPSTEAD ROBERT D

IPC: G11B5/39 ,  G11B5/30

Abstract: A magnetoresistive permalloy film is deposited upon a substrate and coated with a separating layer composed of titanium or a similar high resistivity, conductive material. A soft biasing layer of a material such as permalloy or a hard biasing material such as cobalt chromium is deposited upon the separating layer to complete a sandwich. All layers are coextensive in outline because their outlines are formed by a single etching step.

公开(公告)号：CA1135411A

公开(公告)日：1982-11-09

申请号：CA339742

申请日：1979-11-13

Applicant: IBM

Inventor： HEMPSTEAD ROBERT D ,  MONEY JAMES B

IPC: G11B5/31 ,  G11B5/12

Abstract: A thin film inductive head is formed with nickel-iron binary alloy or nickel-iron-X ternary alloy pole pieces characterized by negative magnetostriction having a saturation magnetostriction coefficient in the range of -1X10-6 to -5X10-6. SA9-78-022

公开(公告)号：CA1068412A

公开(公告)日：1979-12-18

申请号：CA265857

申请日：1976-11-16

Applicant: IBM

Inventor： BAJOREK CHRISTOPHER H ,  HEMPSTEAD ROBERT D ,  KRONGELB SOL ,  MAYADAS ASHOK F

IPC: G11B5/39 ,  G11B5/30 ,  H01H39/00

Abstract: MAGNETORESISTIVE SANDWICH INCLUDING SENSOR ELECTRICALLY PARALLEL WITH ELECTRICAL SHUNT AND MAGNETIC BIASING LAYERS A magnetoresistive Permalloy* film is deposited upon a substrate and coated with a separating layer composed of titanium or a similar high resistivity, conductive material. A soft biasing layer of a material such as Permalloy* or a hard biasing material such as cobalt chromium is deposited upon the separting layer to complete a sandwich. All layers are coextensive in outline because their outlines are formed by a single etching step.

公开(公告)号：CA1100628A

公开(公告)日：1981-05-05

申请号：CA292297

申请日：1977-12-02

Applicant: IBM

Inventor： HEAD NEPHI L ,  HEMPSTEAD ROBERT D ,  KENNEDY THOMAS N ,  LIEU FRED Y

IPC: G11B5/187 ,  G11B5/255 ,  G11B5/31 ,  G11B5/60 ,  G11B5/00

Abstract: CORROSION RESISTANT THIN FILM HEAD ASSEMBLY AND METHOD FOR MAKING A slider element includes a thin film transducer deposited onto a slider along at least one of the rails forming the flying air bearing surface with a magnetic media. A portion of the end tips of the pole pieces and gap of the thin film inductive transducer and a portion of the slider rail adjacent to the transducer is etched by a sputter etching process. A layer of a passivation material such as chromium is sputter deposited into the etched portion such that the leading portion of the rail protects the passivation material from wear. The passivation material over the pole tips of the transducer prevents the corrosion of the iron-nickel alloy comprising the pole tips.

公开(公告)号：FR2386098A1

公开(公告)日：1978-10-27

申请号：FR7805797

申请日：1978-02-23

Applicant: IBM

Inventor： HEAD NEPHI L ,  HEMPSTEAD ROBERT D ,  KENNEDY THOMAS N ,  LIEU FRED Y

IPC: G11B5/187 ,  G11B5/255 ,  G11B5/31 ,  G11B5/60 ,  G11B5/22 ,  G11B5/40

Abstract: A slider element includes a thin film transducer deposited onto a slider along at least one of the rails forming the flying air bearing surface with a magnetic media. A portion of the end tips of the pole pieces and gap of the thin film inductive transducer and a portion of the slider rail adjacent to the transducer is etched by a sputter etching process. A layer of a passivation material such as chromium is sputter deposited into the etched portion such that the leading portion of the rail protects the passivation material from wear. The passivation material over the pole tips of the transducer prevents the corrosion of the iron-nickel alloy comprising the pole tips.