Taw qhia rau Solder Mask

Lub ncoo tiv thaiv yog soldermask, uas yog hais txog ib feem ntawm lub rooj tsav xwm Circuit Court yuav tsum tau pleev xim rau cov roj ntsuab. Qhov tseeb, lub npog ntsej muag no siv cov khoom tsis zoo, yog li tom qab cov duab ntawm lub ntsej muag lub ntsej muag tau kos rau ntawm lub rooj tsavxwm, lub npog ntsej muag tsis yog pleev xim rau cov roj ntsuab, tab sis cov tawv tooj liab raug pom. Feem ntau nyob rau hauv thiaj li yuav nce cov tuab ntawm cov tawv nqaij tooj liab, cov ntaub npog ntsej muag kom muab cov roj ntsuab, thiab tom qab ntawd yas ntxiv kom ua kom tuab ntawm lub tooj liab tooj liab.

Qhov yuav tsum tau muaj rau solder daim npog qhov ncauj

Lub npog ntsej muag yog qhov tseem ceeb heev hauv kev tswj xyuas qhov tsis xws luag hauv kev rov ua dua. Cov neeg tsim qauv PCB yuav tsum txo qis qhov sib nrug lossis huab cua nyob ib puag ncig ntawm cov ntaub qhwv.

Txawm hais tias ntau tus txheej txheem engineers xav cais tag nrho cov ncoo nta ntawm lub rooj tsavxwm nrog lub npog ntsej muag, qhov sib nrug ntawm tus pin thiab lub ncoo loj ntawm cov khoom zoo-pitch yuav xav tau kev txiav txim siab tshwj xeeb. Txawm hais tias lub qhov ncauj qhov ntswg qhib lossis qhov rais uas tsis nyob rau ntawm plaub sab ntawm qfp tuaj yeem ua tau, nws yuav nyuaj dua los tswj cov txuas txuas ntawm cov khoom sib txuas. Rau lub npog ntsej muag ntawm bga, ntau lub tuam txhab muab lub npog ntsej muag uas tsis kov cov ntaub qhwv, tab sis npog txhua yam ntawm cov ntaub qhwv los tiv thaiv cov txuas hniav. Feem ntau cov mount PCBs yog them nrog lub npog ntsej muag, tab sis yog tias qhov tuab ntawm lub npog ntsej muag yog ntau dua 0.04mm, nws yuav cuam tshuam rau daim ntawv thov ntawm cov tshuaj txhuam hniav. Nto mount PCBs, tshwj xeeb tshaj yog cov uas siv cov khoom zoo-pitch, yuav tsum muaj lub npog ntsej muag uas tsis tshua muaj duab.

Ua haujlwm ntau lawm

Cov ntaub ntawv npog ntsej muag yuav tsum tau siv los ntawm cov txheej txheem ntub dej lossis cov yeeb yaj kiab qhuav. Qhuav zaj duab xis solder daim npog qhov ncauj cov ntaub ntawv yog muab nyob rau hauv ib tug tuab ntawm 0.07-0.1mm, uas yuav haum rau tej nto mount khoom, tab sis cov khoom no tsis pom zoo rau cov ntaub ntawv kaw. Ob peb lub tuam txhab muab cov yeeb yaj kiab qhuav uas nyias nyias kom tau raws li cov qauv zoo, tab sis muaj ob peb lub tuam txhab uas tuaj yeem muab cov ntaub ntawv ua kua photosensitive solder daim npog qhov ncauj. Feem ntau, lub qhov ncauj qhov ntswg qhib yuav tsum yog 0.15mm loj dua lub ncoo. Qhov no tso cai rau qhov sib txawv ntawm 0.07mm ntawm ntug ntawm lub ncoo. Low-profile kua photosensitive solder daim npog qhov ncauj cov ntaub ntawv yog kev lag luam thiab feem ntau yog teev rau saum npoo daim ntaub ntawv los muab qhov tseeb qhov ntau thiab tsawg thiab qhov khoob.

Taw qhia rau txheej txheej soldering

Cov txheej txheej yog siv rau SMD ntim thiab sib haum rau cov ntaub qhwv ntawm SMD cov khoom. Hauv kev ua SMT, feem ntau yog siv cov phaj hlau, thiab PCB sib raug rau cov ntaub qhwv cov khoom yog xuas nrig ntaus, thiab tom qab ntawd muab tshuaj txhuam muab tso rau ntawm cov phaj hlau. Thaum lub PCB nyob rau hauv cov hlau phaj, cov tshuaj txhuam cov tshuaj txhuam tawm, thiab nws tsuas yog nyob rau hauv txhua lub ncoo Nws tuaj yeem stained nrog solder, yog li feem ntau lub npog ntsej muag yuav tsum tsis txhob loj dua li qhov loj ntawm lub ncoo, nyiam dua tsawg dua los yog sib npaug. qhov tseeb pad loj.

Cov qib yuav tsum yog yuav luag zoo ib yam li cov khoom siv saum npoo av, thiab cov ntsiab lus tseem ceeb yog raws li hauv qab no:

1. BeginLayer: ThermalRelief thiab AnTIPad yog 0.5 hli loj dua qhov loj ntawm lub ncoo li niaj zaus

2. EndLayer: ThermalRelief thiab AnTIPad yog 0.5 hli loj dua qhov loj ntawm lub ncoo li niaj zaus

3. DEFAULTINTERNAL: nruab nrab txheej

Lub luag hauj lwm ntawm solder mask thiab flux txheej

Lub npog ntsej muag lub ntsej muag feem ntau tiv thaiv cov ntawv ci tooj liab ntawm lub rooj tsav xwm hluav taws xob los ntawm kev raug ncaj qha rau huab cua thiab ua lub luag haujlwm tiv thaiv.

Cov txheej txheem soldering yog siv los ua cov hlau mesh rau lub Hoobkas steel mesh, thiab cov hlau mesh tuaj yeem raug muab tso rau hauv cov ntaub qhwv cov ntaub so ntswg uas yuav tsum tau soldered thaum tinning.

Qhov txawv ntawm PCB soldering txheej thiab solder daim npog qhov ncauj

Ob txheej yog siv rau soldering. Nws tsis txhais hais tias ib tug yog soldered thiab lwm yam yog ntsuab roj; tab sis:

1. Lub npog ntsej muag lub ntsej muag txhais tau tias qhib lub qhov rais ntawm cov roj ntsuab ntawm tag nrho cov npog ntsej muag, lub hom phiaj yog tso cai rau vuam;

2. Los ntawm lub neej ntawd, thaj chaw uas tsis muaj lub npog ntsej muag yuav tsum tau pleev xim rau cov roj ntsuab;

3. Cov txheej txheem soldering yog siv rau SMD ntim.