Sake kwarara walda yana nufin wani tsari na walda wanda ke gane haɗin injiniya da lantarki tsakanin iyakar solder ko fil na abubuwan haɗin ginin da kuma PCB solder gammaye ta hanyar narke solder manna pre-buga akan PCB solder gammaye.
1. Tsari kwarara
Tsari kwarara na reflow soldering: bugu solder manna → hawa → reflow soldering.
2. Halayen tsari
Girman haɗin gwiwa mai siyar yana iya sarrafawa.Ana iya samun girman girman ko siffar da ake so na haɗin gwiwa mai siyarwa daga girman ƙirar kushin da adadin manna da aka buga.
Ana amfani da manna walda gabaɗaya ta bugu na allo na karfe.Domin sauƙaƙa kwararar tsari da rage farashin samarwa, yawanci ana buga man walda guda ɗaya don kowane farfajiyar walda.Wannan fasalin yana buƙatar abubuwan da ke kan kowace fuska ta taro su sami damar rarraba manna solder ta amfani da raga guda ɗaya (ciki har da raga mai kauri ɗaya da ragamar taku).
Tanderun da aka sake fitarwa shine ainihin tanderun ramin zafin jiki da yawa wanda babban aikinsa shine zafi PCBA.Abubuwan da aka shirya akan ƙasan ƙasa (gefen B) yakamata su dace da ƙayyadaddun buƙatun injin, kamar kunshin BGA, yawan abubuwan da ake buƙata da yanki mai lamba ≤0.05mg/mm2, don hana abubuwan da ke saman saman fadowa a lokacin walda.
A reflow soldering, bangaren yana iyo gaba daya akan narkakken solder (solder hadin gwiwa).Idan girman kushin ya fi girman fil ɗin, fasalin ɓangaren ya fi nauyi, kuma shimfidar fil ɗin ya fi ƙanƙanta, yana da sauƙi don ƙaura saboda tashin hankali na narkakkar solder ko tilasta iska mai zafi da ke busawa a cikin tanderun reflow.
Gabaɗaya magana, don abubuwan da za su iya gyara matsayinsu da kansu, girman girman girman kushin zuwa wurin zoba na ƙarshen walda ko fil ɗin, aikin sakawa na abubuwan.Wannan batu ne da muke amfani da shi don ƙayyadaddun ƙirar pads tare da buƙatun matsayi.
Samuwar weld (tabo) ilimin halittar jiki ya dogara ne akan aikin ikon wetting da tashin hankali na narkakkar solder, kamar 0.44mmqfp.Tsarin manna mai bugu shine cuboid na yau da kullun.
Lokacin aikawa: Dec-30-2020