公开(公告)号：DE2758147A1

公开(公告)日：1978-07-13

申请号：DE2758147

申请日：1977-12-27

Applicant: IBM

Inventor： CASTELLANI EUGENE EVANS ,  POWERS JOHN VINCENT ,  ROMANKIW LUBOMYR TARAS

IPC: C25D7/00 ,  C25D3/56 ,  C25D5/08 ,  C25D17/00 ,  C25D21/12 ,  G11B5/31 ,  G11B5/858 ,  H01F10/14 ,  H01F41/14 ,  H01F41/26 ,  C25D3/12 ,  C25D3/20

Abstract: A thin film of low magnetostriction Permalloy 80% nickel - 20% iron +/- 1% is electroplated in a bath having a ratio of about 1.8:1 to 24:1 g/liter ratio of Ni to Fe ions with a plating current density from 10 ma/cm2 - 200 ma/cm2 when plating in sheet form or an Ni/Fe ratio of 25:1 to 85:1 with a current density of 2 ma/cm2 - 110 ma/cm2 when plating through a mask. The fluid in the system is constantly mixed, replenished with fresh iron, acid, and other reagents, is adjusted in temperature and subjected to a continuous laminar regime of mixing. Fresh solution is added to the bath from a reservoir where the above adjustments are made. The inlet for the fresh solution is at the lower end of the plating chamber and directed at a bath mixer which includes a slot through which the fresh solution is directed to optimize mixing in the plating chamber. Complexing agents are avoided. High speed plating is obtained with about 24.4 g/l of Ni++, 1.05 g/l of Fe++, 25 g/l of H3BO3, 0.2 g/l of Na saccharin and a pH of 1.5 to 3.6.

公开(公告)号：DE2604367A1

公开(公告)日：1976-08-26

申请号：DE2604367

申请日：1976-02-05

Applicant: IBM

Inventor： ANDERSON RONALD LEE ,  CASTELLANI EUGENE EVANS ,  MCCAFFREY PATRICK MICHAEL ,  ROMANKIV LUBOMYR TARAS

IPC: H01F1/147 ,  C21D6/00 ,  C22F1/10 ,  H01F1/14 ,  H01F10/00 ,  H01F10/14 ,  H01F41/14

公开(公告)号：DE2720109A1

公开(公告)日：1977-12-22

申请号：DE2720109

申请日：1977-05-05

Applicant: IBM

Inventor： ANDERSON RONALD LEE ,  CASTELLANI EUGENE EVANS ,  MCCAFFREY PATRICK MICHAEL ,  ROMANKIW LUBOMYR TARAS

IPC: H05K3/18 ,  C25D5/02 ,  H01L21/768 ,  H05K3/10 ,  H05K3/24 ,  H05K3/38 ,  C25D7/12 ,  H01L21/88