Verfahren zum Herstellen eines Magnetkern-Matrixspeichers

摘要

Nickel and iron are deposited electrolytically in a circumferential magnetic field produced by current in control conductors 28, 31, 35, printed on the dividing region between two holes 23, 24 in an insulating board 28 carrying a magnetic information store (see Division H3). A copper film 30 is deposited chemically or by a vacuum process and serves as an electrode for electrolytic deposition of the magnetic film. A coating 27 of epoxy resin insulates the control conductors from the magnetic element. Regions of the board in which there is to be no electrolytic deposit are protected by a photo-resist. Electrolytes suitable for use in the deposit of iron and nickel are described.