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Laser marking system for dice carried in trays and method of operation

  • US 6,417,484 B1
  • Filed: 12/21/1998
  • Issued: 07/09/2002
  • Est. Priority Date: 12/21/1998
  • Status: Expired due to Term
First Claim
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1. A method of marking a plurality of IC packages carried in a tray, comprising:

  • providing at least one tray carrying a plurality of discrete IC packages;

    lowering the at least one tray and the plurality of discrete IC packages carried thereby from a first position to a second position;

    moving the at least one tray and the plurality of discrete IC packages carried thereby horizontally to a third position;

    raising the at least one tray and the plurality of discrete IC packages carried thereby to a fourth position;

    marking the plurality of discrete IC packages carried by the at least one tray at the fourth position;

    lowering the at least one tray and the plurality of discrete IC packages carried thereby to the third position;

    moving the at least one tray and the plurality of discrete IC packages carried thereby horizontally to a fifth position; and

    raising the at least one tray and the plurality of discrete IC packages carried thereby to a sixth position.

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