IPC CID Certification Exam PCB Materials, Finishes, and Manufacturing Processes Questions With Answers ,

IPC /




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.
/ // // // // // // // //