Nyumba BGA-soldering kunyumba

khola masiku zamagetsi zamakono kuonetsetsa kuti unsembe umakhala ting'onoting'ono basi. Chifukwa cha ichi chinali kuonekera kwa housings BGA. Pike zochitika zimenezi kunyumba ndipo ife tidzakambirana pansi nkhaniyi.

zambiri

Poyamba izo munali mfundo zambiri pa thupi la Chip lapansi. Chifukwa cha ichi, iwo anayikidwa mu malo aang'ono. Zimenezi zimathandiza kusunga nthawi ndi kulenga zambiri zipangizo kakang'ono. Koma pamaso pa ngati njira mu kupanga akutembenukira anachitazi pa yokonza zipangizo zamagetsi mu phukusi BGA. Brazing mu nkhani iyi, ayenera kukhala molondola ndi ndendende anachita pa luso.

Kodi muyenera?

Muyenera M'sitolo on:

1. siteshoni Soldering, pamene pali kutentha mfuti.
2. Tweezers.
3. Solder phala.
4. Tepi.
5. Desoldering kuluka.
6. Kamwazi (makamaka paini).
7. Osindikizira (kutsatira solder phala pa Chip a) kapena spatula (koma bwino kukhala chimake choyamba).

Soldering BGA-Corps si nkhani zovuta. Koma kuti bwino zomwe zagwiridwa, m'pofunika kugwira ntchito yokonza m'dera ntchito. Komanso kuti n'kutheka kuti mawu a zochita anafotokoza m'nkhani kuuzidwa za mbali. Ndiye luso soldering tchipisi mu BGA phukusi sadzakhala ndi mavuto (ngati kamvedwe aliyense za ndondomeko).

Features

Ndikuwauza kuti luso ndi solder BGA phukusi, tisaiwale zinthu kubwerezabwereza mphamvu zonse. Kotero, icho chinali kugwiritsidwa ntchito Chinese zopangidwa stencils. peculiarity awo kuli tchipisi ingapo pamodzi chidutswa chimodzi chachikulu. Chifukwa izi pamene mkangano osindikizira akuyamba unakhota. The chachikulu cha gulu amatsogolera chakuti iye akufuna pamene Kutentha kwambiri kuchuluka kwa kutentha (ie, pali Redieta zochitika). Chifukwa cha ichi, muyenera nthawi zambiri kuti konzekera Chip (chomwe limakhudza anthu ntchito zake). Komanso, stencils amenewa amapangidwa ndi mankhwala etching. Choncho, phala umagwiritsidwa ntchito si mophweka monga zitsanzo yotentha ndi laser kudula. Chabwino, ngati inu nawo thermojunction. Izi kupewa kupinda stencils pa Kutentha awo. Ndipo potsiriza tisaiwale kuti mankhwala pogwiritsa ntchito laser kudula, amapereka mkulu molondola (zopatuka si upambana 5 microns). Ndipo chifukwa cha zimenezi zingakhale losavuta ndi yabwino ntchito pulani ya ntchito zina. Pa inalowa udzatha, ndi kufufuza zimene zili soldering BGA phukusi luso kunyumba.

maphunziro

Asanayambe otpaivat Chip, m'pofunika kuika chikunena liza m'mphepete mwa thupi lake. Izi zichitike, pakalibe yotchinga yosindikiza, amene amasonyeza pa udindo pakompyuta chigawo. Izi ziyenera kuchitika kuti magawowa chiphunzitso wotsatira wa Chip kubwerera ku gulu. Choumitsira ayenera kupanga mpweya ndi wachikondi mu 320-350 madigiri Celsius. Pankhaniyi mathamangidwe mpweya ayenera kukhala kochepa (mwinamwake idzasintha kumbuyo wabwino pafupi solder). Choumitsira asungike moti perpendicular kwa gulu. Preheat motere kwa mphindi imodzi. Ndiponso mpweya sayenera anatumiza kwa malo ndi wozungulira (m'mphepete) ya bolodi. Izi ndi zofunika pofuna kupewa kutenthedwa kwa galasi la. A makamaka tcheru ndi kukumbukira ichi. Otsatidwa ndi mbedza mphepete mmodzi wa Chip, ndi pamwamba pa bolodi. Munthu sayenera kuyesa kugwetsera mwakukhoza kwanga. Ndipotu, ngati solder sanali kwathunthu kusungunuka, ndiye pali chiopsezo kugwetsera njanji. Nthawi zina kutsatira kamwazi ndi kutentha solder akuyamba kututira mipira. kukula awo adzakhala m'goli. Ndipo soldering tchipisi mu BGA phukusi adzalephera.

kuyeretsa

Ikani spirtokanifol, konzekera ndi kupeza zinyalala Akusonkhanitsa. Pankhaniyi, dziwani kuti njira zofanana sangathe Mulimonsemo ntchito pamene akugwira soldering. Ichi ndi chifukwa koyefishienti zochepa. Otsatidwa ndi kuyeretsa malo ntchito, ndipo adzakhala malo abwino. Ndiye, kuyendera chikhalidwe cha anapezazo ndi n'kuona ngati n'zotheka kukhazikitsa iwo pa malo akale. Ndi yankho zoipa ayenera m'malo. Choncho ndikofunikira kuti muchotse bolodi ndi tchipisi wa solder akale. Palinso kuthekera kuti adzadulidwa "khobiri" pa bolodi (ntchito kuluka). Pankhaniyi, chabwino chingathandize soldering chitsulo yosavuta. Ngakhale kuti anthu ena ntchito ndi kuluka ndi tsitsi dryers. Pamene akuchita mwai ayenera kuwunika umphumphu wa solder chigoba. Ngati chawonongeka, ndiye solder rastechotsya pamodzi njira. Ndiyeno BGA-soldering sadzapambana.

Knurled mipira yatsopano

Mukhoza kugwiritsa ntchito mawu amene akusowekapo kale kukonzekera. Iwo ali mu Zikatero, inu muyenera kuthetsa kudzera ziyangoyango kusungunula. Koma ichi ndi abwino okha ochepa apeza (kuona ndi Chip ndi 250 "mapazi"?). Choncho, ngati njira yosavuta pounika luso ntchito. Zikomo ntchito imeneyi ikuchitika mofulumira ndi khalidwe lomwelo. Ofunika pano ndi ntchito apamwamba solder phala. Adzakhululukidwa yomweyo lidzasinthidwa wanzeru yosalala mpira. Low-khalidwe buku la omwewo apasuke mu ambiri ozungulira "makombo" ang'ono. Ndipo mu nkhani iyi, ngakhale mfundo kuti Kutentha kwa madigiri 400 kutentha ndi kuyanjana ndi kamwazi angakuthandizeni. Pakuti mayiko Chip pa chili mu osindikizira lapansi. Kenako, ntchito spatula kutsatira solder phala (ngakhale mungagwiritse ntchito chala chanu). Ndiye, pokhalabe osindikizira tweezers, m'pofunika kusungunula phala. choumitsira kutentha sayenera upambana madigiri 300 Celsius. Pankhaniyi chipangizo ayenera perpendicular kwa phala ndi. The osindikizira ayenera anakhalabe mpaka solder ikamauma kwathunthu. Pambuyo kuti mukhoza kuchotsa tepi yolusa ndi zokutira zitsulo choumitsira, mpweya umene preheated 150 madigiri Celsius, mokoma kutenthetsa izo mpaka izo zimayamba kusungunula kamwazi. Ndiye mukhoza kusagwirizana kwa Chip osindikizira. Zotsatira zake zopezera mipira yosalala. Chip ndilo kwathunthu okonzeka kukhazikitsa pa bolodi. Monga mukuonera, soldering BGA-zipolopolo si ovuta kunyumba.

fasteners

Poyamba, izo tikulimbikitsidwa kuti chikunena kuwamaliza. Ngati malangizo amenewa, pamalo sanali n'komwe ayenera idzachitika motere:

1. Mungaimitse Chip kuti zinali tanthauzo lake.
2. Angagwirizanitse kwa dimes m'mphepete kotero kuti lifanane ndi mipira.
3. Ife kukonza, amene ayenera kukhala Chip m'mphepete (kwa zimakhalapo kameneka ndi singano ingagwiritsidwe).
4. Chili, poyamba njira imodzi kenako perpendicular kwa izo. Choncho, udzakhala wokwanira zimakhalapo awiri.
5. Timaika Chip pa mayina ndi kuyesera kuti andipeze mipira kukhudza pyataks pa msinkhu pazipita.
6. M'pofunika konzekera m'dera ntchito mpaka solder ndi mu mkhalidwe chosungunula. Ngati njira pamwambazi anachita ndendende Chip sayenera vuto mpando wake. Izi zidzathandiza mphamvu yake ya mavuto padziko, amene ali solder. M'pofunika kuika pang'ono ndithu a kamwazi.

Pomaliza

Apa ndi onse amatchedwa "luso tchipisi soldering mu BGA phukusi." Tikumbukenso apa kuti ntchito osati bwino kuti kwambiri Amateurs wailesi soldering chitsulo ndi chowumitsira tsitsi. Koma ngakhale izi, BGA-soldering zikusonyeza zotsatira zabwino. Choncho, akupitiriza kusangalala ndi kuchita izo bwinobwino kwambiri. Ngakhale watsopano nthawi zonse mantha ambiri, koma ndi nawo ntchitoyo njira imeneyi kwayamba kufala chida.