MATERIALS
ENGINEERING BRANCH
CODE 541
LABORATORY REPORT
TO: 541/Materials
Testing & Applications Group/Ms. D. Kolos
FROM: 541/Materials Analysis &
Technology Group/Mr. A. Montoya
SUBJECT: Inspection of Drilled GLAST LAT
Tracker Flex Cable Coupons and Residue from Drilled Hole
DATE:
ANALYSIS #: AM04-066
PROJECT: GLAST
Samples Submitted:
(1)
Residue
on copper foils from drilled hole on board
(2)
Materials
used by Parlex in manufacturing of GLAST Tracker Flex product
(3)
Drilled
holes on two coupons processed by Parlex
Analysis Performed:
Fourier
Transform Infrared Microspectroscopy (m-FTIR)
Results/Conclusions:
The
residue observed on the copper foils was analyzed from 4000 to 650 cm-1. The IR spectrum collected from the residue
identified it as a modified acrylic compound.
Based on this result, four materials used by Parlex during manufacturing
of the Tracker Flex product were analyzed.
The materials supplied were a white laminate used as backup, a brown
laminate, a piece of Kapton sheet, and a sheet of acrylic adhesive. All four materials were analyzed with FTIR
and the acrylic adhesive was identified as the source of the residue found on
the copper threads.
In an
attempt to verify the Parlex cleaning process, they prepared two coupons for
analysis. Coupon #2 was drilled,
followed by a water blast, plasma etch, and microetched. Coupon #3 was drilled, plasma etched, and
microetched. Several drilled holes from
each coupon were sectioned and the copper foils inside the holes were examined
using m-FTIR. In each case, no detectable levels of the
acrylic adhesive or other organic contaminants were identified.
If there
are any questions regarding this report, please contact me at x6-5289 or Alex.Montoya@nasa.gov.
Signed Copy
Available Upon Request
Alex
Montoya
cc:
541/Blackwood,
J.