公开(公告)号：US3573193A

公开(公告)日：1971-03-30

申请号：US3573193D

申请日：1968-12-04

Applicant: IBM

Inventor： POWERS JOHN V ,  ROMANKIW LUBOMYR T

IPC: H01F10/06 ,  C23F17/00 ,  C23B5/34

CPC classification number: H01F10/06

Abstract: A METHOD FOR CONTROLLING MAGNETIC PROPERTIES OF MAGNETIC FILMS BY CONTROLLING THE ROUGHNESS OF THE SUBSTRATE SURFACE ONTO WHICH THE MAGNETIC FILM IS DEPOSITED. ON ONE HAND THE COERCIVITY MAY BE VARIED ALTHOUGH THE MAGNETIC FILM THICKNESS IS BEING KEPT CONSTANT, ON THE OTHER HAND CONSTANT VALUES OF COERCIVITY CAN BE OBTAINED EVEN THOUGH THE THICKNESS OF THE MAGNETIC FILM MAY VARY. THE SUBSTRATE CONSISTS OF A CONDUCTIVE GROUND PLATE COATED WITH A THIN LAYER OF INSULATING MATERIAL AND THEREAFTER COPPER PLATED. PRIOR TO THE DEPOSITION OF THE MAGNETIC FILM, THE COPPER SURFACE IS TREATED BY ELECTRO PULSE PLATING INCLUDING REVERSE PULSING TO OBTAIN A WELL DEFINED AND CONTROLLED SURFACE ROUGHNESS.

公开(公告)号：US3523824A

公开(公告)日：1970-08-11

申请号：US3523824D

申请日：1966-12-29

Applicant: IBM

Inventor： POWERS JOHN V ,  ROMANKIW LUBOMYR T

IPC: C23C18/20 ,  C23C18/28 ,  H01F10/12 ,  H01F41/24 ,  H01F41/26 ,  G11B5/84

CPC classification number: C23C18/208 ,  C23C18/2006 ,  C23C18/28 ,  C23C18/30 ,  H01F10/12 ,  H01F41/24 ,  H01F41/26

公开(公告)号：US3652442A

公开(公告)日：1972-03-28

申请号：US3652442D

申请日：1970-04-06

Applicant: IBM

Inventor： POWERS JOHN V ,  ROMANKIW LUBOMYR T

IPC: C25D5/00 ,  C25D17/00 ,  H01F17/00 ,  H01F17/06 ,  B01K3/00

CPC classification number: C25D21/10 ,  C25D5/006 ,  C25D5/08 ,  C25D17/12 ,  H01F17/0033 ,  H01F17/06 ,  Y10T29/49073

Abstract: An electroplating cell is constructed to prevent current spreading in the electrolyte during the plating of a metal or metal alloy onto a substrate. The cell is constructed such that the cross-sectional area of current path is substantially the same as the cross-sectional area of a pair of electrodes spaced apart in the cell. This is accomplished by placing the electrodes in the cell such that their edges are substantially in contact with the dielectric or insulating walls of the cell. The cell also contains electrolyte agitating means to provide uniform laminar flow of the electrolyte across the surface of one of the electrode. Metal alloy films deposited with the use of this cell exhibit uniform thicknesses on rather large surface areas. Where magnetic metal alloys are plated, the films not only exhibit uniform thicknesses laterally on the whole cathode but uniform composition and magnetic properties throughout as well.

Abstract translation: 构造电镀单元以防止在将金属或金属合金电镀到基底上时电解液中的电流扩散。 电池被构造成使得电流路径的横截面面积与电池中间隔开的一对电极的横截面面积基本相同。 这通过将电极放置在电池中使得它们的边缘基本上与电池的电介质或绝缘壁接触来实现。 电池还包含电解质搅拌装置，以使得电解质在电极之一的表面上均匀地层流。 使用该电池沉积的金属合金膜在相当大的表面积上表现出均匀的厚度。 在电镀金属合金的情况下，薄膜不仅在整个阴极上横向显示出均匀的厚度，而且整体上的组成和磁性均匀。

公开(公告)号：US3406107A

公开(公告)日：1968-10-15

申请号：US41659464

申请日：1964-12-07

Applicant: IBM

Inventor： GREBE KURT R ,  POWERS JOHN V

IPC: C25D3/46

CPC classification number: C25D3/46