公开(公告)号：US4782414A

公开(公告)日：1988-11-01

申请号：US78739

申请日：1987-07-28

申请人： Mohamad T. Krounbi ,  Gerald G. Lopatin ,  Arthur L. Thaver, Jr.

发明人： Mohamad T. Krounbi ,  Gerald G. Lopatin ,  Arthur L. Thaver, Jr.

IPC分类号： G11B5/245 ,  G11B5/39 ,  G11B5/127

CPC分类号： G11B5/39

摘要： A magnetoresistive (MR) read head in which an insulator layer defines the effective track width over which the read head is sensitive. The insulator layer is deposited or patterned to extend a predetermined distance over the MR element, and the predetermined distance is chosen equal to the desired track width. Conductor leads are deposited in contact with the regions of the MR element not covered by the insulator layer with the conductor leads extending up to, and possibly overlapping, the edges of the insulator layer so that the read signal is sensed over the length of the MR element covered by the insulator layer.

公开(公告)号：US4619731A

公开(公告)日：1986-10-28

申请号：US792409

申请日：1985-10-29

申请人： Daniel A. Buttry ,  Mohamad T. Krounbi ,  Owen R. Melroy

发明人： Daniel A. Buttry ,  Mohamad T. Krounbi ,  Owen R. Melroy

IPC分类号： C23F1/00 ,  C04B41/53 ,  C04B41/91 ,  H01L21/308 ,  H01L21/311 ,  H05K1/03 ,  H05K3/00 ,  H05K3/46 ,  B44C1/22 ,  C03C15/00 ,  C03C25/06

CPC分类号： C04B41/009 ,  C04B41/5353 ,  C04B41/91 ,  H01L21/31111 ,  H05K1/0306 ,  H05K3/0017 ,  H05K3/4629

摘要： Via holes are etched in an alumina layer using an etchant bath of ethylenediaminetetraacetic acid at a pH above 9.

摘要翻译： 在氧化铝层中使用乙二胺四乙酸的蚀刻剂浴在pH高于9的条件下蚀刻通孔。