Making new C-cages

This is actually a long series on steps:

  • Wait for Lockheed Martin to deliver the rest of the MCMs
  • Glue on output cables
  • Ship MCM+output cable to Pace for wirebonding and gluing on surface mount components.
  • Test MCM
  • glue on (previously tested) Si strip detector + cable
  • ship to Pace for wirebonding
  • test MCM+Si assembly -- this will require reconstructing this test setup, which has been dismantled.
  • Glue MCM+Si assemblies to C-cage

    I do not have a schedule right now, but Lockheed Martin has completed 24 new MCMs. Those have been sent to Pace for surface mounting and wirebonding of the output cable. Pace seems to have introduced some shorts in some of the MCMs with the surface mount components. We can probably pull the offending surface mount parts off, clean off the excess epoxy and re-do the work. This will take a few days of someone's time, and 10 days or so, counting shipping to return to Pace -- say two weeks total, most of it waiting.

    The remaining 3*24 = 72 MCMs will probably be delivered around March -- that's the date I do not know. It will take a few weeks to glue on all the output cables, a few weeks to go to Pace and back, and a few weeks to test the MCMs. After that it will take 2 weeks or so to glue together all the assemblies, 2 more weeks for wire-bonding, 2 more weeks for testing, and 2 more weeks to glue together the C-cages. This adds up to about 14 weeks -- or a little more than 3 months to complete these steps if done sequentially. Of this, about 4 weeks consists of waiting for Pace. Some of these steps can be done in parallel to speed them up.


    John Sullivan
    last update: 15-Jan-2002