METHOD FOR DETERMINATION OF LOCAL ETCHING TIME OF MONOCRYSTALLINE FERRITE PLATES Russian patent published in 1995 - IPC

Abstract SU 1521135 A1

FIELD: magnetic recording. SUBSTANCE: method involves selecting three plates from batch of plates; conducting test etching of selected plates for three various periods of time, respectively; measuring working path width of selected plates upon termination of test etching; evaluating average arithmetic values of working path width of each plate among selected plates and calculating etching time for plates of this batch. EFFECT: increased yield of high-quality monocrystalline ferrite plates.

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SU 1 521 135 A1

Authors

Detsik L.V.

Miljaeva L.O.

Rozanov O.V.

Spirin G.M.

Titova L.A.

Shadrin A.D.

Dates

1995-08-27Published

1987-02-09Filed