Kuwonongeka Kwa Mabowo Pa PCB

Pikani Mabowo & Mabowo Pagulu Losindikizidwa Lozungulira

Mabowo a pini kapena mabowo owombera ndi chinthu chomwecho ndipo amayamba chifukwa cha kusindikizidwa kwa bolodi panthawi ya soldering.Kupanga mapini ndi kuwomba panthawi yowotchera mafunde nthawi zambiri kumalumikizidwa ndi makulidwe a plating yamkuwa.Chinyezi pa bolodi chimatuluka kudzera muzitsulo zopyapyala zamkuwa kapena zovunda.Kuyika mu bowo kuyenera kukhala osachepera 25um kuti chinyontho cha bolodi chisanduke kukhala nthunzi wamadzi ndikutulutsa mpweya kudzera pakhoma lamkuwa panthawi yowotchera.

Mawu akuti pin kapena blowhole nthawi zambiri amagwiritsidwa ntchito kutanthauza kukula kwa dzenje, pini kukhala yaying'ono.Kukula kumangodalira kuchuluka kwa nthunzi wamadzi womwe ukutuluka ndi pomwe solder imalimba.

Chithunzi 1: Blow Hole

Njira yokhayo yothetsera vutoli ndikuwongolera mawonekedwe a bolodi ndi 25um yamkuwa yopaka mkuwa pobowo.Kuphika nthawi zambiri kumagwiritsidwa ntchito kuthetsa mavuto a gassing poyanika bolodi.Kuphika bolodi kumatulutsa madzi mu bolodi, koma sikuthetsa chomwe chimayambitsa vutoli.

Chithunzi 2: Pin Hole

Kuwunika Kosawonongeka kwa Mabowo a PCB

Mayesowa amagwiritsidwa ntchito poyesa matabwa osindikizidwa omwe amakutidwa ndi mabowo otulutsa mpweya.Imawonetsa kuchuluka kwa zokutira zopyapyala kapena zotupa zomwe zimapezeka kudzera pamabowo.Itha kugwiritsidwa ntchito pa risiti ya katundu, panthawi yopanga kapena pamisonkhano yomaliza kuti mudziwe chomwe chimayambitsa ma voids muzitsulo za solder.Malingana ngati chisamaliro chimatengedwa poyesa matabwa angagwiritsidwe ntchito popanga pambuyo poyesedwa popanda kuwononga maonekedwe kapena kudalirika kwa mankhwala omaliza.

Zida Zoyesera

• Zitsanzo zosindikizidwa zama board kuti ziwunidwe
• Mafuta a Canada Bolson kapena njira ina yoyenera yomwe imawonekera bwino kuti iwunikenso ndipo imatha kuchotsedwa mosavuta mukayesedwa
• Sirinji ya Hypodermic yogwiritsira ntchito mafuta pabowo lililonse
• Pepala lopukuta kuti muchotse mafuta ochulukirapo
• Maikulosikopu okhala ndi kuyatsa pamwamba ndi pansi.Kapenanso, chithandizo choyenera chokulira pakati pa 5 mpaka 25x kukula ndi bokosi lowala.
• Soldering chitsulo ndi kutentha kulamulira

Njira Yoyesera

1. Tsamba lachitsanzo kapena gawo la bolodi limasankhidwa kuti liwunikenso.Pogwiritsa ntchito syringe ya hypodermic, lembani mabowo aliwonse kuti muwunike ndi mafuta owoneka bwino.Kuti mufufuze bwino, m'pofunika kuti mafuta apange meniscus concave pamwamba pa dzenje.Mawonekedwe a concave amalola mawonekedwe owoneka bwino athunthu atakutidwa ndi dzenje.Njira yosavuta yopangira meniscus ya concave pamwamba ndikuchotsa mafuta ochulukirapo ndikugwiritsa ntchito pepala lopukutira.Pankhani ya mpweya uliwonse womwe umakhalapo mu dzenje, mafuta owonjezera amagwiritsidwa ntchito mpaka mawonekedwe omveka bwino a mkati mwake akupezeka.
2. Tsamba lachitsanzo limayikidwa pamwamba pa gwero la kuwala;izi zimathandiza kuwunikira kwa plating kudzera mu dzenje.Bokosi losavuta lowala kapena siteji yowunikira pansi pa microscope ikhoza kupereka kuyatsa koyenera.Thandizo loyang'ana loyenera loyang'ana lidzafunika kuyang'ana dzenje panthawi ya mayeso.Pakuwunika kwanthawi zonse, kukulitsa kwa 5X kudzalola kuwonera kupangidwa kwa thovu;Kuti muwunikenso mwatsatanetsatane pobowo, kukulitsa kwa 25X kuyenera kugwiritsidwa ntchito.
3. Kenako, reflow the solder mu yokutidwa ndi mabowo.Izi zimatenthetsanso dera lozungulira.Njira yosavuta yochitira izi ndikuyika chitsulo chosungunuka bwino pamalo a pad pa bolodi kapena panjira yolumikizana ndi pad.Kutentha kwenikweni kumatha kukhala kosiyanasiyana, koma 500 ° F nthawi zambiri kumakhala kokhutiritsa.Bowolo liyenera kufufuzidwa nthawi imodzi panthawi yogwiritsira ntchito chitsulo chosungunuka.
4. Pakangotha ​​​​kanthawi kochepa malata atalowanso m'bowo, tinthu tating'ono ting'onoting'ono timaoneka tikutuluka m'dera lopyapyala kapena lopindika.Kutuluka kunja kumawoneka ngati mtsinje wokhazikika wa thovu, zomwe zimasonyeza mabowo a pini, ming'alu, voids kapena plating woonda.Kaŵirikaŵiri ngati kutulutsa mpweya kumawonedwa, kudzapitirira kwa nthawi ndithu;nthawi zambiri zimapitilira mpaka gwero la kutentha litachotsedwa.Izi zitha kupitilira kwa mphindi 1-2;muzochitika izi kutentha kungayambitse kusinthika kwa zinthu za bolodi.Nthawi zambiri, kuwunika kumatha kuchitika mkati mwa masekondi 30 kuchokera pakugwiritsa ntchito kutentha kwa dera.
5. Pambuyo poyesa, bolodi ikhoza kutsukidwa muzitsulo zoyenera kuchotsa mafuta omwe amagwiritsidwa ntchito poyesa.Mayesowa amalola kuwunika mwachangu komanso kothandiza pamwamba pa mkuwa kapena malata / lead plating.Mayeso atha kugwiritsidwa ntchito podutsa mabowo opanda malata / lead;muzochitika za zokutira zina za organic, kuphulika kulikonse chifukwa cha zokutira kumatha pakangopita masekondi angapo.Mayesowa amaperekanso mwayi wolembera zotsatira zonse pavidiyo kapena filimu kuti mudzakambirane mtsogolo.

Nkhani ndi zithunzi zochokera pa intaneti, ngati kuphwanya kulikonse pls lemberani kuti tifufute.
NeoDen imapereka mayankho athunthu a mzere wa SMT, kuphatikiza uvuni wa SMT reflow, makina osokera, makina osankha ndi malo, makina osindikizira a solder, PCB loader, PCB unloader, chip mounter, SMT AOI makina, makina a SMT SPI, makina a SMT X-Ray, Zida zopangira msonkhano wa SMT, Zida zopangira PCB SMT zida zosinthira, ndi zina zilizonse makina a SMT omwe mungafune, chonde titumizireni kuti mumve zambiri:

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