Browse Prior Art Database

Coil Adhesion Design

IP.com Disclosure Number: IPCOM000123260D
Original Publication Date: 1998-Aug-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 3 page(s) / 62K

Publishing Venue

IBM

Related People

Tsuda, S: AUTHOR [+3]

Abstract

This article discloses a structure to improve the coil and comb bonding strength and quality by creating grooves in two directions of the comb adhesion surface.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Coil Adhesion Design

   This article discloses a structure to improve the coil and
comb bonding strength and quality by creating grooves in two
directions of the comb adhesion surface.

   The breakage of the VCM (voice coil motor) coil and comb
adhesion has been a problem in terms of quality.  The bonding
conditions are affected by many means such as surface cleanliness
and reduce the stableness of the process.  When the process is
affected significantly, the coil will break off the comb in the
shear direction (FIG 1).  Usually adhesion forces are weaker in the
shear direction.

   In this disclosed design, grooves are formed in two normal
directions, a simple shear force will not act on the adhesive, but a
combination of shear, compression, and tension (FIG 2).  By creating
grooves in two directions, any force the adhesive is induced to will
not be a pure shear force.  The bonding stableness and force will
improve significantly.

   An example of this design is shown in FIG 3.  'V' grooves
are formed in the vertical and horizontal directions.  The vertical
grooves can be formed in the extrusion die, where the horizontal ones
are machined.