Magnetic property retention

摘要

A method and an apparatus for retaining magnetic properties of a magnet while undergoing manufacturing processes are presented. Ferrous materials with relatively good magnetic permeability are disposed adjacent to poles of magnet substantially containing magnetic field lines from the magnet within the ferrous materials. When the magnetic field lines are thereby substantially contained, the magnet can be exposed to elevated temperatures without losing magnetization strength. Adhesives, particularly adhesives that cure when exposed to elevated temperatures can be used with magnets configured to contain magnetic field lines without having the magnets lose magnetic strength.

主权项

1. A method for attaching a magnet having a magnetic field strength to a lid of a computing device, the method comprising:
attaching a magnetic shunt to the lid with a first adhesive; attaching the magnet to the magnetic shunt with a second adhesive; placing a magnetic keeper adjacent to the magnet, wherein magnetic fields from the magnet are substantially contained within the magnetic shunt and the magnetic keeper; heating the magnet, the magnetic shunt, the first adhesive and the second adhesive to a predetermined temperature for a predetermined amount of time; and removing the magnetic keeper,
wherein the magnetic keeper maintains the magnetic field strength of the magnet after heating the magnet, the magnetic shunt, the first adhesive and the second adhesive.