Coherent light generators – Particular temperature control – Heat sink
Reexamination Certificate
1998-12-22
2001-08-07
Leung, Quyen P. (Department: 2881)
Coherent light generators
Particular temperature control
Heat sink
C372S075000
Reexamination Certificate
active
06272159
ABSTRACT:
BACKGROUND OF THE INVENTION
Laser diodes and laser diode bars are available commercially. Many such devices comprise a laser diode or laser diode bar mounted on a heat sink and also includes electrical contact to the laser. Such a device also comprises an electrical insulator also positioned on the heat sink and typically having a thickness greater than that of the laser. An electrical conductor (lead) is positioned on top of the insulator and bends downward to make contact with the laser. The lead is positioned to contact a next adjacent laser assembly if a stack configuration is desired and provides electrical continuity with that next heat sink.
Laser diode packages of this type, although very competitive in cost and performance, suffer a reduced yield due to the bending of the lead which overlies the insulating layer and contacts the laser.
BRIEF DESCRIPTION OF THE INVENTION
In accordance with the principles of this invention, the above-noted lead includes a plurality of slots at the bend in the lead with the axes of the slots being aligned with the long dimension of the lead. In one embodiment where a stack of lasers, each attached to an associated heat sink, is assembled, the lead takes the form of a rectangular loop with an open central area of a shape to permit continuity between adjacent heat sinks of the stack.
REFERENCES:
patent: 4627062 (1986-12-01), Bender
Leung Quyen P.
Opto Power Corp
Shapiro Herbert M.
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