Kev saib xyuas niaj hnub ntawm cov tub ntxhais tooj liab solder cov khoom tom qab ntim khoom feem ntau yog nyob ntawm kev ntseeg tau thiab qhov system- qib kev tiv thaiv. Cov ntsiab lus tseem ceeb yog tswj hwm qhov chaw ua haujlwm kub thiab av noo, zam kev ua haujlwm tsis zoo, thiab tsis tu ncua kev saib xyuas hluav taws xob ua haujlwm kom ntseeg tau ntev - lub sijhawm ua haujlwm ruaj khov.
Raws li cov qauv kev sib txuas tseem ceeb hauv kev ntim khoom siab heev, cov tooj liab tub ntxhais solder pob (CCSB) tau tsim kev sib txuas ruaj khov tom qab tso pob thiab rov ua dua. Nws "kev tu" yog ntau ntxiv txog kev ua haujlwm - theem kev siv thiab kev tswj ib puag ncig dua li kev hloov lub cev lossis kev pabcuam.
Kev tswj kub thiab av noo: Tiv thaiv thermal Stress thiab Corrosion Qhov kev pom zoo ua haujlwm kub yog nyob nruab nrab ntawm -40℃thiab 125℃kom tsis txhob muaj ntau tshaj qhov thermal expansion coefficient sib piv ntawm cov khoom ntim thiab txo cov kev sib koom tes ua kom qaug zog los ntawm thermal cycling.
Cov av noo yuav tsum qis dua 85% RH. Cov av noo ib puag ncig yuav ua rau substrate noo noo nqus thiab condensation nkag mus, ua rau muaj kev pheej hmoo ntawm electrochemical corrosion, tshwj xeeb tshaj yog nyob rau hauv lub xub ntiag ntawm residual halogen flux.
Mechanical Protection: Tsis txhob muaj kev vibration thiab cuam tshuam
Thaum cov pob tooj liab muaj qhov cuam tshuam zoo dua piv rau cov khoom siv sib xyaw ua ke, nyob rau hauv siab - kev vibration ib puag ncig xws li tsheb thiab cov khoom lag luam, nws tseem tsim nyog los txo cov kev cuam tshuam ntawm kev ntxhov siab ntawm cov pob qij txha los ntawm kev co -damping tsim thiab potting compound reinforcement.
Thaum tuav thiab teeb tsa, lub zog ncaj qha yuav tsum raug zam ntawm lub pob kom tsis txhob muaj kev ntxhov siab hauv cheeb tsam uas tuaj yeem ua rau kev nthuav tawm ntawm microcracks.
