Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Etched Suspension Assembly Structure for Higher Eigen Frequency

IP.com Disclosure Number: IPCOM000105784D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Inoue, S: AUTHOR [+4]

Abstract

Disclosed is a suspension assembly structure for raising its eigen frequencies, especially both the first torsional mode (T1) and the first tangential mode (T2), and for reducing their gains. The suspension assembly disclosed here is made of a thicker stainless steel sheet than the conventional one and its hinge area is etched to the conventional load beam thickness to make the gram load stiffness equivalent. Its stiffened area by two flanges remains thicker in its material thickness and the high stiffness created by the thick material can boost its eigen frequencies and reduce their gains.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 94% of the total text.

Etched Suspension Assembly Structure for Higher Eigen Frequency

      Disclosed is a suspension assembly structure for raising its
eigen frequencies, especially both the first torsional mode (T1) and
the first tangential mode (T2), and for reducing their gains.  The
suspension assembly disclosed here is made of a thicker stainless
steel sheet than the conventional one and its hinge area is etched to
the conventional load beam thickness to make the gram load stiffness
equivalent.  Its stiffened area by two flanges remains thicker in its
material thickness and the high stiffness created by the thick
material can boost its eigen frequencies and reduce their gains.

      Fig. 1 shows the logical background of this disclosure.  From
the two vibrational modes shown here, it can be easily seen that the
stiffened area by two flanges is very sensitive to HSA eigen
frequencies.

      Fig. 2 shows two examples of the structure, A and B, compared
with the conventional HSA design.  The structure A is the design that
has an etched area on only a hinge and needs parameter adjustments of
the weld spot between the load beam and mount plate because the load
beam has a greater material thickness.  The structure B is the design
to eliminate such parameter adjustments mentioned above by extending
etched areas to the whole hatched areas in the figure where the spot
welding is taking place.  The stiffened area by two flanges in both
the designs can remain as a thicker load bea...