Umnatha wentsimbi we-SMT usetyenziselwa ulwelo kunye nemo eqinileyo yoshicilelo lwe-solder paste kwibhodi ye-PCB, ibhodi yesekethe ukongeza kwibhodi yamandla ethandwa kakhulu ngoku sebenzisa iteknoloji ye-SMT, kukho ezininzi itafile yokuncamathela yokudibanisa kwi-PCB, ezizezi ngaphandle komngxuma wokuwelda. Indlela, kwaye umngxuma wentsimbi yomnatha uhambelana nephedi yokudibanisa kwi-PCB, ibhrashi yezandla inqanaba letoti kwibrashi eqinileyo iya kuba sisiqingatha solwelo kwaye iqine. umnatha wentsimbi, kwaye ke amacandelo ancamathiselweUmatshini we-SMT, kwaye ke amacandelo enziwa yireflow oven.
I. Umgaqo wokuvula we-SMT metal mesh
1. Amacandelo ohlobo lwe-CHIP amaxesha amathathu ngokwendawo yonke ye-10 ~ 15[%], gcina umgama ofanayo, uze uguqule ngokweemfuno zokukhokela.
2. Amacandelo ohlobo lwe-IC (kubandakanywa nomgca wokufakwa) ubude ukuya kwi-0.1-0.20mm eyongezelelweyo, ububanzi beemfuno zokukhokela ukuguqula, kunokwandiswa ngokufanelekileyo.
3. ukuchasana kunye nohlobo lwamacandelo, ubude be-0.1mm eyongezelelweyo.Ububanzi bunokuguqulwa ngokwemfuneko yelothe
Amanye amacandelo ahlala efana nezi mfuno zingentla.
II.Ukwamkelwa kwe-mesh yensimbi ye-SMT
1. Uxinzelelo lwe-mesh yensimbi 35≤F≤50 (N / cm) impazamo yoxinzelelo: F ingaphantsi okanye ilingana ne-8 (N / cm).
2. inkangeleko yentsimbi yemesh: umphezulu womnatha ngaphandle kwamanqaku omkrwelo, akukho qhuma.
3. Ngaphambi kokuveliswa kwe-mesh entsha yensimbi, faka ngokufanelekileyo i-mesh yensimbi kumatshini wokushicilela, kwaye uzame ukuprinta iiplati ezi-2 ~ 5 ukuqinisekisa umphumo wokushicilela.
4. Emva kokuba ukuveliswa kwesilingo kudluliselwe, bhala ixesha lokuvelisa kumaxwebhu afanelekileyo olawulo lwegridi yensimbi.
III.Iimfuno zokushicilela ifomathi ye-SMT mesh yensimbi
1. Xa ibhodi enye kunye nenetha enye, indawo yegrafu yokuvula kufuneka igxininiswe.
2. Xa iibhodi ezimbini zePCB ezahlukeneyo zivulwa kumnatha ofanayo wentsimbi, kufuneka ukuba imiphetho yeebhodi ezimbini ihlulwe nge-30mm.
3. Xa iiPCB ezimbini ezifanayo zivulwa kumnatha wentsimbi, isithuba phakathi kwamacwecwe amabini endibano ye-180 ° kufuneka ibe yi-30mm.
Ixesha lokuposa: Jun-10-2021