公开(公告)号：US3626157A

公开(公告)日：1971-12-07

申请号：US3626157D

申请日：1969-05-28

Applicant: IBM

Inventor： SMITH WILLIAM R ,  WALTERS NEAL L

IPC: G06K7/08 ,  H01L29/00 ,  G06K7/06 ,  G11C13/00 ,  H03K17/60

CPC classification number: G06K7/081 ,  H01L29/00

Abstract: A perforated media reader using field-effect devices for sensors in which the media acts as one electrode of selected sensors as a function of the perforation pattern, thereby generating discrete signals indicating the location of the perforations.