Sanadin da Magani na PCB Board Deformation

PCB murdiya matsala ce ta gama gari a cikin samar da yawan jama'a na PCBA, wanda zai yi tasiri mai yawa akan taro da gwaji, wanda zai haifar da rashin zaman lafiyar kewaye aikin lantarki, gazawar kewayawa/bude da'ira.

Abubuwan da ke haifar da nakasar PCB sune kamar haka:

1. Zazzabi na PCBA hukumar wucewa tanderu

Allunan kewayawa daban-daban suna da matsakaicin haƙurin zafi.Lokacin dareflow tandazafin jiki ya yi yawa, mafi girma fiye da matsakaicin ƙimar allon kewayawa, zai sa allon ya yi laushi kuma ya haifar da lalacewa.

2. Dalilin PCB board

Shahararriyar fasahar da ba ta da gubar, zafin wutar tanderun ya fi na gubar, kuma buƙatun fasahar faranti sun fi girma da girma.Ƙarƙashin ƙimar TG, da sauƙi na'urar kewayawa za ta lalace a lokacin tanderun.Mafi girman ƙimar TG, mafi tsadar allon zai kasance.

3. Girman allon PCBA da adadin alluna

Lokacin da allon kewayawa ya ƙareinjin walda reflow, ana sanya shi gabaɗaya a cikin sarkar don watsawa, kuma sarƙoƙi a bangarorin biyu suna zama wuraren tallafi.Girman allon da'irar ya yi yawa ko kuma adadin alluna ya yi yawa, yana haifar da ɓacin rai na allon zuwa tsakiyar tsakiya, yana haifar da nakasawa.

4. Kauri na PCBA

Tare da haɓaka samfuran lantarki a cikin ƙananan ƙanana da sirara, kauri na allon kewayawa ya zama mai laushi.The thinner da kewaye hukumar ne, yana da sauki don sa nakasawa daga cikin jirgin karkashin rinjayar high zafin jiki a lokacin da reflow waldi.

5. Zurfin v-yanke

V-cut zai lalata tsarin tsarin hukumar.V-yanke zai Yanke tsagi akan ainihin babban takardar.Idan layin V-yanke ya yi zurfi sosai, za a haifar da nakasar allon PCBA.
Abubuwan haɗin yadudduka akan allon PCBA

Hukumar da’ira ta yau tana da allo mai dumbin yawa, akwai wuraren haxawa da yawa, ana raba waxannan wuraren haxawa zuwa rami, rami makaho, bunne rami, waxannan wuraren haxawa za su takaita tasirin faxawar thermal da qanqarewar hukumar da’ira. , wanda ya haifar da nakasar allon.

Magani:

1. Idan farashin da sarari sun ba da izini, zaɓi PCB tare da babban Tg ko ƙara kauri na PCB don samun rabo mafi kyau.

2. Zayyana PCB da kyau, yanki na bangon ƙarfe mai gefe biyu ya kamata a daidaita, kuma ya kamata a rufe Layer na jan karfe a inda babu kewaye, kuma ya bayyana a cikin hanyar grid don ƙara ƙarfin PCB.

3. An riga an gasa PCB kafin SMT a 125 ℃ / 4h.

4. Daidaita tsayin daka ko nisa don tabbatar da sarari don fadada dumama PCB.

5. Welding tsari zafin jiki a matsayin low kamar yadda zai yiwu;M murdiya ya bayyana, za a iya sanya shi a cikin madaidaicin matsayi, sake saitin zafin jiki, don saki damuwa, gabaɗaya za a samu sakamako mai gamsarwa.