Browse Prior Art Database

Pivoted Arm Flying Head Suspension

IP.com Disclosure Number: IPCOM000093111D
Original Publication Date: 1967-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Pflughaupt, LE: AUTHOR [+2]

Abstract

Drawing 1 shows a pivoted, rigid arm suspension 10 for flying head slider 11. Pivot point 12 is located such that magnetic recording gap 13 is offset by a nominal distance b from the point on slider 11 closest to magnetic recording surface 14. By locating pivot point 12 in this manner, slight variations D and L in pivot point placement, due to manufacturing tolerances and dynamic and thermal strain, are allowed without producing substantial variances in gap-to-surface spacing h(g).

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Pivoted Arm Flying Head Suspension

Drawing 1 shows a pivoted, rigid arm suspension 10 for flying head slider 11. Pivot point 12 is located such that magnetic recording gap 13 is offset by a nominal distance b from the point on slider 11 closest to magnetic recording surface 14. By locating pivot point 12 in this manner, slight variations D and L in pivot point placement, due to manufacturing tolerances and dynamic and thermal strain, are allowed without producing substantial variances in gap-to-surface spacing h(g).

In this suspension, the various parameters are chosen so that the hydrodynamic bearing is affected by the pivot point location in such a manner as to compensate for location variation over some range. Thus, the minimum spacing h(m) between slider 12 and surface 14 is allowed to vary to maintain a given slider flying height at recording gap 13.

The equation which illustrates the effects of the variation of pivot point 12 in the horizontal direction is h(g) = h(m) (b+ D)/2//d where h(m) = f(D, P-b).

The typical relationship between hm and D for a constant P-b is shown in drawing 2. The resultant relationship between h(g) and D is shown in drawing 3, illustrating the allowable variation of pivot point 12 about the nominal location 0 without significant alteration of the surface to gap spacing.

The equation of the relationship shown for variations inthe vertical positioning of the pivot point 12 L is h(g) = h(m) + (b - >LD/2(A+b)|)2/d where h(m) = f(L,...