BLANK FOR MAGNETIC HARD DISK AND METHOD FOR PRODUCING SAME

摘要

A BLANK (1) FOR MAGNETIC HARD DISK AND A METHOD FOR PRODUCING THE SAME ARE PROVIDED, CHARACTERISED IN THAT THE ATTACHMENT OR ADHESION OF A BLANK (1) OF A DISK SHAPE TO EACH OTHER CAN BE PREVENTED WHEN SUCH BLANK (1) IS STACKED TOGETHER FOR DISK ANNEALING, THEREBY IMPROVING THE PRODUCTIVITY OF MAGNETIC HARD DISK, AND THAT THE DAMAGE OF BLANK SURFACE CAN BE PREVENTED DURING BLANKING. FIRSTLY, AN ALUMINIUM ALLOY PLATE IS SUBJECTED TO CONTINUOUS SURFACE WASHING PROCESS WITH AN ETCHING SOLUTION WHILE WINDING OFF THE ALUMINIUM ALLOY PLATE IN A COIL, WHEREBY THE OXIDE FILM ON THE SURFACE OF THE ALUMINIUM ALLOY PLATE IS REMOVED TO CONCURRENTLY DEPOSIT INSOLUBLE SMUT ON THE SURFACE. THEN, THE ALUMINIUM ALLOY PLATE AFTER THE WASHING PROCESS IS PRESSED FOR BLANKING THEREOF INTO A BLANK (1) OF A DISK SHAPE.FIGURE 1