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Electro-magnetic Laser Bar Manipulation

IP.com Disclosure Number: IPCOM000121602D
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 1 page(s) / 34K

Publishing Venue

IBM

Related People

Gasser, M: AUTHOR [+3]

Abstract

Disclosed are electro-magnetic systems for handling, manipulation and orientation of laser bars and chips having a magnetizable contact area. The systems are using magnetic forces for the laser bar and chip manipulation. No additional processing steps would be required, since one of the contact materials contains a magnetic specie.

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Electro-magnetic Laser Bar Manipulation

      Disclosed are electro-magnetic systems for handling,
manipulation and orientation of laser bars and chips having a
magnetizable contact area.  The systems are using magnetic forces for
the laser bar and chip manipulation.  No additional processing steps
would be required, since one of the contact materials contains a
magnetic specie.

      Application of electro-magnets allows an exact control of the
magnetic fields, so that pick-up, release, and orientation can be
performed simply by adjusting the magnet flux.

      The figure shows a sketch of a simple electro-magnetic tweezer
1 which can be used for the pick-up of laser bars and chips.  When a
current is applied to the coil 2, a bar 3 can be held between the
poles 4.1 and 4.2 of the magnet. One advantage of this tweezer 1,
comparing it with conventionally used mechanical or vacuum tweezers,
is that it can be used in standard processes at atmosphere and in
vacuum as well.

      Orientation of bars and chips is possible by the employment of
magnetic fields which are generated such that the bars and chips
orient themselves along the magnetic field gradients.  Laser bars and
chips can be be moved by controlling and regulating separate magnetic
fields, such that the magnetizable parts are jumping form one field
to the next.