Name that Ware December 2011

The Ware for December 2011 brings us from 1945 back to the modern day:

Happy holidays!

16 Responses to “Name that Ware December 2011”

  1. MPS says:

    a semiconductor made of germanium, possibly a transistor or a diode

  2. Plum33 says:

    Looks like solid state laser from Blu-ray drive.

  3. f4eru says:

    I would guess a LED.

  4. tz says:

    Photo-scr. Or photo darlington, but given the more complex srtucture i’d guess scr

    Lasers are usually rectangular, and you would only need 2 connectors (bottom is one), and it appears to have a base, middle, and top.

    It may not be ‘photo’ at all, but an old opened can.

  5. f4eru says:

    Sorry, if it’s a Nichia, it’s more likely one from the NDHV series
    Other candidates are :
    Sanyo DL3146/DL5146
    Panasonic LNC416
    Sony :

  6. Sanjay says:

    1945! So its earlier than the first transistor. I’ll guess its one of the first LEDs. Silicon Carbide perhaps ?

  7. Asm says:

    For the people with a reading challenge: This ware is NOT from 1945. The old one was. This one is “from the modern day”.

    My guess: Not so sure it’s a laser diode! The substrate the smaller chip is mounted on doesn’t strike me as terribly thermally conductive, which is a bad idea in LD applications.

    I’d rather think it’s a fancy photodiode. Maybe something fast, too.

  8. dan says:

    i would guess it’s a ye oldie replica of a field effect transistor made (modern day) in a test lab somewhere…

  9. bryan says:

    it looks like we are supposed to see that the square is transparent. a crystal oscillator? an experimental rig to test the dialectric properties of the crystal?

    could be a fancy low-kelvin thermometer with the black material as a thermal dampener.

  10. ke5fx says:

    VCSEL, maybe from a chip-scale atomic clock?

  11. f4grx says:

    the coarse grained structure of the cross section reminded me the germanium, since silicon is more “glassy” when cut…

    but wait… looking back at the first photo, I now recognize the metallic half-cylinder on which the main die is connected. I already saw that in salvaged laser diodes.

    so: this is a burnt/destroyed laser diode. I can’t guess the color (because nearly all diodes have the same packaging) neither why it was broken.

    The grained surface is one end of the laser cavity’s, by which the laser light normally exits the semiconductor diode. it was burnt because of a too high current and started to melt, giving this grainy look.

    The small cube “glued” on the top of the main die is a power control photodiode, to monitor the intensity of the laser light emitted by the main diode. This is used as a feedback to control the current in the diode.

    Here is another duide closeup. This one is bigger than bunnie’s one:

    Here we have one that looks like bunnie’s one:


  12. DavidZ says:

    Some of the other comments seem very plausible so i’ll go a different direction :)

    It appears that there is a thin film or coating on the outside of the curvature. There is also separation between the component and the two wires coming out so… could this be a magnetic read head? Possibly something like a single track of a mag strip or for something like a DAT or cassette media?

  13. imnot_the_maister says:

    My bet is that it’s a two dimensional laser diode, shiny black composite is graphite which reduces the junction temperature as it has better spread of the generated heat resulting in higher power diodes using this insulation.

    The layer behind the graphite is a metal heat spreader which interfaces graphite layer. Graphite heat spreader is necessary because of the small area of the photon producing dissimilar semiconductor junctions.

  14. investigador_64 says:

    It´s a semiconductor laser, red?, infrared?, blue?, point laser probably.

  15. agwn says:

    Strain gauge based on piezo resistive effect? Should that date be 1954?