SMT reflow ovenichinhu chakakosha chekugadzira midziyo muSMT process, inova musanganiswa wehovhoni yekubikira.Basa rayo guru nderekurega paste solder muvheni reflow, iyo solder ichanyungudutswa pakupisa kwakanyanya mushure mekunge solder inogona kuita zvikamu zveSMD uye mabhodhi ematunhu pamwe chete mumudziyo welding.Pasina SMT reflow soldering midziyo SMT maitiro haagone kupedzisa kuitira kuti zvemagetsi zvikamu uye redunhu bhodhi soldering basa.Uye SMT pamusoro petireyi yeovheni ndiyo inonyanya kukosha chishandiso kana chigadzirwa chiri pamusoro peiyo reflow soldering, ona pano unogona kunge uine mimwe mibvunzo: SMT pamusoro petirayi yeovheni chii?Chii chinangwa chekushandisa SMT overbake trays kana overbake vatakuri?Heano tarisa kuti SMT overbake tray chii chaizvo.
1. Chii chinonzi SMT overbake tray?
Iyo inonzi SMT over-burner tray kana over-burner carrier, chokwadi, inoshandiswa kubata PCB uye wozoitora kuseri kune solder choto tireyi kana mutakuri.Tray mutakuri anowanzo ane positioning column inoshandiswa kugadzirisa PCB kudzivirira kuti isashande kana deformation, mamwe epamusoro tireyi anotakura anowedzerawo chivharo, kazhinji cheFPC, uye kuisa magineti pa, dhawunirodha chishandiso kana mukombe wekusveta uchisunga. ne, saka SMT chip processing plant inogona kudzivirira PCB deformation.
2. Kushandiswa kweSMT pamusoro pevheti yevheni kana pamusoro pechinangwa chekutakura kwevheni
Kugadzirwa kweSMT paunenge uchishandisa pamusoro petirayi yehovhoni ndiko kuderedza PCB deformation uye kudzivirira kuwanda kwezvikamu kudonha, zvese zviri zviviri zvine hukama neSMT kudzokera kunzvimbo yepamusoro yekupisa kwechoto, kune huwandu hwakawanda hwezvigadzirwa zvino uchishandisa lead-isina maitiro. , lead-isina SAC305 solder paste yakanyungudutswa tini tembiricha ye 217 ℃, uye SAC0307 solder paste yakanyungudutswa tini tembiricha inowira anenge 217 ℃ ~ 225 ℃, tembiricha yepamusoro kudzoka kune solder inokurudzirwa pakati pe240 ~ 250 ℃ , isu tinowanzo sarudza iyo FR4 ndiro yeTg150 pamusoro.Kureva kuti, kana PCB ichipinda munzvimbo yepamusoro yekupisa yechoto chemoto, chokwadi, yakapfuura tembiricha yayo yekuchinjisa girazi munzvimbo yerabha, iyo rubber mamiriro ePCB anozoremara chete kuratidza hunhu hwayo. rudyi.
Yakabatana nekutetepa kwebhodhi ukobvu, kubva pakukora kwe1.6mm zvichidzika kusvika 0.8mm, uye kunyangwe 0.4mm PCB, bhodhi rakatetepa rakadai mukubhabhatidzwa kwekupisa kwepamusoro mushure mechoto chekunyungudika, zviri nyore nekuda kwepamusoro. tembiricha uye bhodhi deformation dambudziko.
SMT pamusoro petireyi yeovheni kana pamusoro pemutakuri wehovhoni ndiko kukunda PCB deformation uye zvikamu zvinodonha matambudziko uye kuoneka, kazhinji inoshandisa mbiru yekumisikidza kugadzirisa iyo PCB yekumisikidza gomba, mundiro yakakwira tembiricha deformation kuchengetedza zvinobudirira chimiro chePCB. kuderedza deformation yeplate, hongu, panofanirawo kuva nemamwe mbariro yekubatsira nzvimbo yepakati yeplate nekuda kwekukanganisa kwegiravhiti kunogona kukotamisa dambudziko rekunyura.
Uye zvakare, iwe unogona zvakare kushandisa iyo yakawandisa inotakura hazvisi nyore kukanganisa dhizaini yembabvu kana mapoinzi ekutsigira pazasi pezvikamu zvinorema kuti ive nechokwadi chekuti zvikamu hazvidonhe padambudziko, asi dhizaini yemutakuri uyu inofanira kunge yakanyanya. chenjerera kuti udzivise yakawandisa tsigiro mapoinzi kusimudza zvikamu zvakakonzerwa nerutivi rwechipiri rwekusakwana kweiyo solder paste kudhinda dambudziko kunoitika.
Nguva yekutumira: Kubvumbi-06-2022