SMT Short Circuit Zvikonzero uye Mhinduro

Sarudza uye isa muchinauye mimwe michina yeSMT mukugadzira uye kugadzirisa ichaonekwa yakawanda yakaipa zviitiko, senge monument, bhiriji, virtual welding, fake welding, bhora remazambiringa, tin bead zvichingodaro.SMT SMT kugadzirisa dunhu diki rinonyanya kuwanda mukufamba kwakanaka pakati peIC pini, inowanzoitika mu 0.5mm uye pazasi nzvimbo pakati peI IC pini, nekuda kwenzvimbo yayo diki, isina kukodzera template dhizaini kana kudhinda kuri nyore kuburitsa kushoma kusiiwa.

Zvinokonzera uye mhinduro:

Chikonzero 1:Stencil template

Solution:

Iyo gomba madziro esimbi mesh yakatsetseka, uye iyo electropolishing kurapwa inodiwa mukugadzira maitiro.Kuvhura kwemambure kunofanirwa kuita 0.01mm kana 0.02mm yakafara pane kuvhurwa kwemesh.Iyo yekuvhura inotenderedzwa conical, iyo inobatsira kuburitswa kunoshanda kwerata paste pasi perata, uye inogona kuderedza nguva dzekuchenesa mesh ndiro.

Chikonzero 2: solder paste

Solution:

0.5mm uye pasi pepitch yeIC solder paste inofanira kusarudzwa muhukuru hwe20 ~ 45um, viscosity mu800 ~ 1200pa.S

Chikonzero 3: Solder paste printerkudhinda

Solution:

1. Rudzi rwe scraper: iyo scraper ine marudzi maviri epurasitiki scraper uye steel scraper.Iyo 0.5 IC kudhinda inofanira kusarudza simbi scraper, iyo inobatsira kune solder paste inoumba mushure mekudhinda.

2. Kudhinda kukurumidza: iyo solder paste ichaenderera mberi pane template pasi pekusundira kwe scraper.Iko kukurumidza kudhinda kumhanya kunobatsira kune springback ye template, asi inodzivisa iyo solder paste leakage;Asi kumhanya kunonoka, iyo solder paste haitenderere patemplate, zvichikonzera kusagadziriswa kweiyo solder paste yakadhindwa pane solder pad.Kazhinji, iyo yekumhanyisa yekudhinda yepakati yakanaka ndeye 10 ~ 20mm/s

3 kudhinda mode: parizvino iyo inonyanya kudhinda modhi yakakamurwa kuita "contact printing" uye "non-contact kudhinda".
Pane mukaha pakati pe template uye PCB yekudhinda mode ndeye "isina-contact kudhinda", iyo general gap kukosha ndeye 0.5 ~ 1.0mm, mukana wayo wakakodzera akasiyana viscosity solder paste.

Hapana mukaha pakati pe template nePCB kudhinda kunonzi "contact printing".Zvinoda kugadzikana kwechimiro chese, chakakodzera kudhinda yakakwirira chaiyo tin template uye PCB kuchengetedza yakanyatso bata, mushure mekudhinda uye kuparadzaniswa kwePCB, saka iyi nzira yekuzadzisa kudhinda kwakanyanya, kunyanya yakakodzera nzvimbo yakanaka, yekupedzisira-yakanaka. spacing of solder paste kudhinda.

Chikonzero 4: SMT muchinagomo refu

Solution:

Kune 0.5mm IC mukuiswa kunofanirwa kushandiswa 0 chinhambwe kana 0 ~ 0.1mm inokwira kureba, kuitira kudzivirira nekuda kwekukwira kwekukwirira kwakadzikira zvekuti solder paste kuumba kudonha, zvichikonzera reflux pfupi dunhu.