Browse Prior Art Database

Molded Modular Nickel Plating Mandrels for Thin Film Disk Substrates

IP.com Disclosure Number: IPCOM000117181D
Original Publication Date: 1996-Jan-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Jacobson, NE: AUTHOR [+2]

Abstract

A nickel plating mandrel for thin film disks is disclosed. Inconsistent plating at the disk to mandrel contact area is greatly minimized.

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

Molded Modular Nickel Plating Mandrels for Thin Film Disk Substrates

      A nickel plating mandrel for thin film disks is disclosed.
Inconsistent plating at the disk to mandrel contact area is greatly
minimized.

      The new design of plating mandrel is a molded modular design
that is stacked onto an octagonal rod (Figure).  The design
incorporates draft angles on all disk contact surfaces, therefore,
reducing the contact areas to points or lines only.  Previous designs
have had surface-to-surface contact between the disk and mandrel.
The molded mandrel has eight separate disk locating pins protruding
from the center as opposed to a groove cut into a continuous
diameter.  All of these features allow free flow of the plating
chemicals and the rinse water.

      All of the stated features, free rinsing, improved chemical
flow, and minimized contact area between the disk and mandrel, add up
to minimizing/eliminating the inconsistent plating at the inside
diameter of the plated and polished substrate.