Whiskers on a Tin-Plated Flange of a Ka Band Waveguide (documented in
The images below depict tin whiskers found growing from
the tin-plated flange of a Ka band waveguide. The high density of
whiskers, some approaching 5-mm long, were found within several weeks of
receipt of product by the waveguide user. In the end application whiskers
of this size and density produced signal reflections and losses that
affected the electrical performance of the waveguide.
Note: The user's procurement requirements for this
waveguide did not include tin as an optional surface finish. Pure
tin surface finish was supplied in error.