Zeziphi iziKhokelo zokuHlaziya uMbane?

1. Isiseko sokuphinda sisebenze kwakhona: ukuphinda kusebenze kwakhona akukho maxwebhu oyilo kunye nemimiselo, engavunywanga ngokuhambelana nemimiselo echaphazelekayo, akukho ziprothokholi zenkqubo yokuvuselela ngokutsha.

2. Inani le-rework evumelekileyo kwi-joint ye-solder nganye: ukulungiswa kwakhona kuvunyelwe kwi-solder enesiphene, kwaye inani lokuphinda lisebenze kwi-solder ngalinye aliyi kudlula amaxesha amathathu, ngaphandle koko inxalenye ye-solder yonakaliswe.

3. Ukusetyenziswa kwamacandelo asusiweyo: amacandelo asusiweyo ngokomgaqo akufanele aphinde asetyenziswe kwakhona, ukuba ufuna ukuwasebenzisa, kufuneka ahambelane neempawu zokuqala zombane zamacandelo kunye novavanyo lokuhlola ukusebenza kwenkqubo, ukuhlangabezana neemfuno ngaphambi kokuvumela ukufakwa.

4. Inani le-desoldering kwiphedi nganye: iphedi nganye eprintiweyo kufuneka ibe ngumsebenzi wokudiliza (oko kukuthi, ukuvumela kuphela ukutshintshwa kwezinto enye), i-solder joint intermetallic compound (IMC) ubukhulu be-1.5 ukuya kwi-3.5µm, ubukhulu buya kukhula. emva kokunyibilika, ukuya kuthi ga kwi-50µm, ijoyinti ye-solder iba brittle, amandla e-welding ayehla, kukho ubungozi bokuthembeka obunzulu phantsi kweemeko zokungcangcazela;kunye nokunyibilikisa i-IMC kufuna ubushushu obuphezulu, kungenjalo akunakwenzeka ukususa i-IMC.Umaleko wobhedu ekuphumeni komngxuma wokutyhutyha yeyona thinnest, kwaye iphedi ithanda ukuphuka ukusuka apha emva kokunyibilika kwakhona;kunye nokwandiswa kwe-thermal ye-axis ye-Z, i-copper layer deforms, kunye ne-pad iyahlukana ngenxa yokuphazamiseka kwe-lead-tin solder joint.Ityala elingenalo i-lead liya kutsala i-pad yonke: i-PCB ngenxa yefiber yeglasi kunye ne-epoxy resin enomphunga wamanzi, emva kokutshatyalaliswa kobushushu: i-welding ezininzi, i-pad kulula ukuyibopha, kunye nokwahlukana kwe-substrate.

5. Umphezulu wokunyuka kunye nofakelo oluxubileyo lwe-PCBA indibano emva kweemfuno ze-welding zokugoba kunye nokugqwethwa: ukukhwela komphezulu kunye nofakelo oluxubeneyo lwendibano yePCBA emva kokuthoba ukugoba kunye nokugqwetha okungaphantsi kwe-0.75% yeemfuno

6. Inani elipheleleyo lokulungiswa kwendibano ye-PCB: inani elipheleleyo lokulungiswa kwendibano ye-PCB lilinganiselwe kwi-6, ukuphinda kusebenze kwakhona kunye nokuguqulwa kuchaphazela ukuthembeka.