Ukufakwa okunembile kwezingxenye zokuhlanganiswa kwendawo endaweni egxilile ye-PCB kuyinjongo eyinhloko yokucubungula isichibi se-SMT, enqubweni yokucubungula isichibi kuzovela nakanjani izinkinga zenqubo ezithinta ikhwalithi yesichibi, njengokugudluzwa kwezingxenye.
Ngokuvamile, uma inqubo yokucutshungulwa kwe-patch, uma kukhona ukushintshwa kwezingxenye, kuyinkinga edinga ukunakwa, futhi ukubukeka kwayo kungase kusho ukuthi kunezinye izinkinga eziningana ohlelweni lwe-welding. Ngakho-ke siyini isizathu sokususwa kwezingxenye ekucutshungulweni kwe-chip?
Izimbangela ezivamile zezimbangela ezahlukene zokushintsha iphakheji
(1) Isivinini somoya se-reflow welding welding sikhulu kakhulu (ikakhulukazi senzeka esithandweni se-BTU, izingxenye ezincane neziphakeme kulula ukuzishintsha).
(2) Ukudlidliza kukaloliwe wokuqondisa kagesi, kanye nesenzo sokudlulisa isikhweli (izingxenye ezisinda kakhulu)
(3) Idizayini yephedi i-asymmetrical.
(4) Ukuphakama kwephedi yosayizi omkhulu (SOT143).
(5) Izingxenye ezinamaphini ambalwa nezipani ezinkulu kulula ukudonselwa eceleni yi-solder surface tension. Ukubekezelela izingxenye ezinjalo, njengamakhadi e-SIM, amaphedi noma i-steel mesh I-Windows kufanele ibe ngaphansi kobubanzi bephinikhodi yengxenye kanye no-0.3mm.
(6) Ubukhulu bazo zombili iziphetho zezingxenye buhlukile.
(7) Amandla angalingani ezingxenyeni ezithile, njengephakeji lokududula okunqanda ukumanzisa, imbobo yokubeka noma i-slot card yokufaka.
(8) Eduze kwezingxenye ezijwayele ukukhipha umoya, njengama-tantalum capacitor.
(9) Ngokuvamile, i-solder paste enomsebenzi oqinile akulula ukuyishintsha.
(10)Noma iyiphi into engabangela ikhadi elimile izodala ukususwa.
Bhekana nezizathu ezithile
Ngenxa ye-reflow welding, ingxenye ibonisa isimo sokuntanta. Uma kudingeka ukuma okunembile, umsebenzi olandelayo kufanele wenziwe:
(1)Ukuphrinta kwe-solder paste kufanele kunembile futhi usayizi wewindi lemeshi lensimbi akufanele libe ngaphezu kuka-0.1mm ububanzi kunophini wengxenye.
(2) Dala ngokunengqondo iphedi nendawo yokufaka ukuze izingxenye zikwazi ukulinganisa ngokuzenzakalelayo.
(1) Lapho uklama, igebe phakathi kwezingxenye zesakhiwo kufanele likhuliswe ngendlela efanele.
Okungenhla yisici esidala ukugudluzwa kwezingxenye ekucutshungulweni kwesichibi, futhi ngithemba ukukunikeza ireferensi ~
Isikhathi sokuthumela: Nov-24-2023
