公开(公告)号：US3612955A

公开(公告)日：1971-10-12

申请号：US3612955D

申请日：1969-01-21

Applicant: BELL TELEPHONE LABOR INC

Inventor： BUTHERUS ALEXANDER D ,  HUFFSTUTLER MILES C JR ,  MORTON JACK A

IPC: H01F7/20 ,  H01L21/60 ,  H01L21/68 ,  H01L23/482 ,  H05K3/30 ,  H05K13/02 ,  H01H3/14

CPC classification number: H05K13/022 ,  H01F7/20 ,  H01L21/68 ,  H01L21/681 ,  H01L23/4822 ,  H01L24/81 ,  H01L2224/81801 ,  H01L2924/01006 ,  H01L2924/01029 ,  H01L2924/01033 ,  H01L2924/01078 ,  H01L2924/01079 ,  H01L2924/01082 ,  H01L2924/01327 ,  H01L2924/14 ,  H01L2924/19041 ,  H01L2924/19043 ,  H05K3/303 ,  H05K2201/083 ,  H05K2201/10166 ,  H05K2201/10689 ,  H05K2203/166 ,  H05K2203/168 ,  Y02P70/613 ,  Y10T29/49133

Abstract: Ferromagnetic materials are incorporated into circuit boards in accordance with predetermined patterns to enable by magnetic attraction substantially automatic positioning on the boards of semiconductor devices containing ferromagnetic material distributed therein in configurations to match the material in the circuit boards.