公开(公告)号：US3706926A

公开(公告)日：1972-12-19

申请号：US3706926D

申请日：1971-06-04

Applicant: IBM

Inventor： BARRAGER STEPHEN M ,  BATE GEOFFREY ,  SMITH SIDNEY H

IPC: G11B5/31 ,  G01R35/00

CPC classification number: G11B5/314 ,  G11B5/3166 ,  Y10T29/49004 ,  Y10T29/49036 ,  Y10T29/49046 ,  Y10T29/49048

Abstract: Magnetic head elements are batch fabricated on areas of a substrate. During manufacture, and before final separation and processing of the areas into discrete multi-track magnetic heads, defective areas are identified for removal. An electric signal source subjects the head areas to a magnetic field which is detected as electric current in each head area. The detected current value in acceptable head areas falls within a predefined range. All head areas having a current outside the range are defined as defective. The magnetic field emanates from one set of head areas in the vicinity of another set of head areas being tested.

Abstract translation: 磁头元件是在衬底的区域上批量制造的。 在制造期间，并且在将区域最终分离和处理成离散多磁道磁头之前，确定缺陷区域以便去除。 电信号源使头部区域受到在每个头部区域中被检测为电流的磁场。 可接受的头部区域中检测到的电流值落在预定范围内。 具有超出范围的电流的所有头部区域被定义为有缺陷的。 磁场从被测试的另一组头部区域附近的一组头部区域发出。