Also, download and read:
cleanroom final design review(.pdf format)
THIS YEAR'S TEAM:
Carl Strombom - Industry Mentor
System Status: April 2001The Cleanroom is in good operational order. We have not replaced the plastic sheeting as of yet, since cost is a factor. The cleanroom is up to industry standards, and the HEPA filters are working properly. When the budget allows or when a supplier can make available plastic at a price that the project can afford, the clean room subsystem will move forward with plastic walls. We have 3 students that have taken electro static discharge (ESD) test and are capable of working on SPARTNIK with in the cleanroon.
System Status: June 2000
The cleanroom is completed and working well. We are looking in to replacing the plastic sheets that make up the walls of the cleanroom, with clear Plexiglas or Lexan. We would like clear walls so outside observers can view Spartnik with ease.
System Status: May 2000
Final preparations are underway for the return of Spartnik's shell from Lockheed. We are currently making sure that the cleanroom is as clean as possible, so when Spartnik's shell returns, we can keep the applied solar cells as contaminant-free as possible. Now we will finally begin the integration procedures.
System Status: April 2000
We met with a representative from VWR Scientific Products who
helped us select the supplies we need for the cleanroom. With
the representative's help we were able to obtain the best
possible price for the products we were looking for. The
representative placed our order, and most of the supplies
arrived a couple of weeks later. However, the caps and gowns are
still on back order. We hope that they will arrive before
Spartnik's shell, +Z, and -Z plates arrive back from Lockheed.
We are currently
searching for reasonably priced cleanroom supplies such as
gowns, caps, gloves, etc. We are also in the process of
determining the cleanroom's class rating.
The purpose of the cleanroom is to assemble the Spartnik microsatellite in a near contaminate-free environment. There are two main reasons for integrating Spartnik in a cleanroom. First, Spartnik's optical system must remain as contaminate-free as possible. The Optical equipment assembly requires a Class 100 environment or greater. Second, Spartnik must not contaminate the launch vehicle or any other payload aboard the launch vehicle.
Three laminar flow HEPA filters were mounted on C-frames.
Moreover, the walls of plastic were built to enclose the exit-flow
filters and a working area of approximately 110 square feet.
These walls allow six inches of space above the floor. Air from
the surrounding room is drawn in through the intake filters
where suspended particles are removed, and then exhausted into
the enclosed cleanroom. As air enters the cleanroom, air is
forced out along the base of the walls. This airflow creates
positive-pressure inside the cleanroom, so that no dust
particles can enter the cleanroom from the surrounding
The HEPA filters were mounted on top of C-frames, and placed
in a corner of San José State University's College of
Engineering Space Subsytems Laboratory. The filters and C-frames
form an "L" shape. The plastic forming the walls and
the ceiling were attached to the filters by velcro-tape and
magnets. The aluminum frames of two room dividers were hinged to
the C-frames in order to enclose the "L" shape.
Castors support the opposite side of the aluminum frames. Again,
using velcro-tape and magnets, more plastic was attached to the
aluminum frames-thus completely enclosing an area of
approximately 110 square feet.
While the HEPA filters are on, the plastic walls of the
cleanroom bulge outward-proving that there is positive pressure
inside the cleanroom. So no dust contaminates can enter the
cleanroom while the filters are on.
- Only members of the Integration & Manufacturing and
Cleanroom subsystems (and the systems engineers) are allowed
to work in the cleanroom.
- All personnel working in the cleanroom must fill out the
sign in/out sheet (name, time in, time out, task(s)
performed, equipment signed out-if applicable).
- Bunny suits, booties, gloves, and masks(?) must be worn
inside the cleanroom at all times. (Please wipe your feet on
the mat before donning the booties.)
- Please keep the door closed at all times.
- Do not turn off the hoods, but please remember to turn off
the hood lights before leaving.
- No matter how hot you think you are, keep the windows
closed at all times. If you have to take a break for a few
minutes, do so. The windows allow a lot of dust to enter
room 236-which defeats the purpose of having a cleanroom.
- Due to the limited space, a maximum of four people will be
allowed into the cleanroom at any given time.
- Room 236 must be cleaned at least once every two weeks in
order to minimize the level of contaminants entering the
cleanroom. (Please be sure to include this information in
the cleanroom log.)
- Remember to reseal every piece of hardware, and if you are
removing anything, include this information in the cleanroom