CID
/ /
Certification
/ /
Exam
/ /
PCB
/ /
Materials,
/ /
Finishes,
/ /
and
/ /
Manufacturing
/ /
Processes Questions With Answers
/ // // // //
What /
is
/ /
Moisture
/ /
absorption? -
/ // /
CORRECT
/ /
ANSWERS(S)✔✔Affects
/ /
dimensional
/ /
,/ stability /
/ and /
/ changes /
/ the /
/ electrical /
/ characteristic /
/ in /
/ the /
/ material which can cause potential difficulties in assembly.
// // // // // // //
The //
3 /
general
/ /
methods
/ /
of
/ /
plating
/ /
material
/ /
on
/ /
PCBs. -
/ // /
CORRECT
/ /
ANSWERS(S)✔✔Immersion, electroless, and electrolytic
/ // // //
,What /
are
/ /
the
/ /
benefits
/ /
of
/ /
metallic
/ /
coatings /
/ // /
final
/ /
(surface)
/ /
finish. -
/ // /
CORRECT
/ /
ANSWERS(S)✔✔Corrosion prevention, Improved long-
/ // // //
term solderability //
What /
is Immersion Plating - CORRECT ANSWERS(S)✔✔Simplest
/ // // // // //
of
// /
the
/ /
wet
/ /
processes;
/ /
involves
/ //
a /
simple
/ /
galvanic
/ /
, / replacement /
/ reaction; /
/ the /
/ more /
/ noble /
/ metal /
/ in/
/ the /
/ solution /
/ picks /
/ up /
/ electrons /
/ from /
/ the /
/ less noble metal immersed in the solution and plates out.
// // // // // // // // //
Immersion /
finishes -
/ // /
CORRECT
/ /
ANSWERS(S)✔✔More
/ /
beneficial
/ /
than
/ /
HASL because immersion has a flatter base for attachment.
/ // // // // // // // //