Kodi BGA Assembly ndi chiyani?
Kusonkhana kwa BGA kumatanthauza njira yoyika Ball Grid Array (BGA) pa PCB pogwiritsa ntchito njira yosinthira magetsi. BGA ndi gawo lokwezedwa pamwamba lomwe limagwiritsa ntchito mipira yosiyanasiyana yosinthira magetsi. Pamene bolodi la dera likudutsa mu uvuni wosinthira magetsi, mipira iyi yosinthira magetsi imasungunuka, ndikupanga maulumikizidwe amagetsi.
Tanthauzo la BGA
BGA: Mzere wa Gridi ya Mpira
Kugawa kwa BGA
PBGA: pulasitiki BGA pulasitiki yophimbidwa ndi BGA
CBGA: BGA yopangira ma CD a ceramic BGA
CCGA: Chipilala cha ceramic cha BGA ceramic
BGA yokonzedwa bwino
TBGA: tepi ya BGA yokhala ndi gridi ya mpira
Masitepe a Kukhazikitsa BGA
Njira yosonkhanitsira BGA nthawi zambiri imakhala ndi njira zotsatirazi:
Kukonzekera kwa PCB: PCB imakonzedwa poika solder phala pa mapepala pomwe BGA idzayikidwe. Solder phala ndi chisakanizo cha tinthu ta solder alloy ndi flux, zomwe zimathandiza pa njira yosolder.
Kuyika kwa BGAs: Ma BGAs, omwe amakhala ndi chip yolumikizirana yokhala ndi mipira yosokera pansi, amayikidwa pa PCB yokonzedwa. Izi nthawi zambiri zimachitika pogwiritsa ntchito makina odzipangira okha kapena zida zina zosonkhanitsira.
Kusungunulanso: PCB yosonkhanitsidwa pamodzi ndi ma BGA omwe aikidwa imadutsa mu uvuni wosungunulanso. Uvuni wosungunulanso umatenthetsa PCB kufika kutentha komwe kumasungunula phala la solder, zomwe zimapangitsa kuti mipira ya solder ya ma BGA isungunukenso ndikukhazikitsa kulumikizana kwamagetsi ndi ma PCB pads.
Kuziziritsa ndi Kuyang'anira: Pambuyo pa njira yobwezeretsanso solder, PCB imaziziritsidwa kuti ilimbikitse malo olumikizira solder. Kenako imafufuzidwa ngati pali zolakwika zilizonse, monga kusakhazikika bwino, ma shorts, kapena ma connection otseguka. Kuyang'anira kwa otomatiki (AOI) kapena X-ray kungagwiritsidwe ntchito pa izi.
Njira Zachiwiri: Kutengera ndi zofunikira zenizeni, njira zina monga kuyeretsa, kuyesa, ndi kuphimba kofanana zitha kuchitika pambuyo pa kusonkhana kwa BGA kuti zitsimikizire kudalirika ndi mtundu wa chinthu chomalizidwa.
Ubwino wa BGA Assembly
BGA Ball Grid Array
EBGA 680L
LBGA 160L
PBGA 217L Pulasitiki Mpira Grid Array
SBGA 192L
TSBGA 680L
CLCC
CNR
CPGA Ceramic Pin Grid Array
Phukusi la DIP la Inline Dual
DIP-tab
FBGA
1. Malo ochepa opondapo
Ma phukusi a BGA ali ndi chip, maulumikizidwe, substrate yopyapyala, ndi chivundikiro chozungulira. Pali zigawo zochepa zowonekera ndipo phukusili lili ndi mapini ochepa. Kutalika konse kwa chip pa PCB kumatha kukhala kotsika mpaka mamilimita 1.2.
2. Kulimba
Mapaketi a BGA ndi olimba kwambiri. Mosiyana ndi QFP yokhala ndi pitch ya 20mil, BGA ilibe ma pini omwe amatha kupindika kapena kusweka. Nthawi zambiri, kuchotsa BGA kumafuna kugwiritsa ntchito siteshoni yokonzanso BGA kutentha kwambiri.
3. Kutsika kwa mphamvu ya parasitic inductance ndi capacitance
Ndi mapini afupiafupi komanso kutalika kochepa kwa makonzedwe, ma phukusi a BGA amawonetsa kutsika kwa mphamvu ya parasitic komanso mphamvu zochepa, zomwe zimapangitsa kuti magetsi azigwira bwino ntchito.
4. Malo osungira zinthu ambiri
Poyerekeza ndi mitundu ina ya ma CD, ma CD a BGA ali ndi gawo limodzi mwa magawo atatu okha a ma CD ndipo pafupifupi nthawi 1.2 kuposa malo a chip. Zinthu zokumbukira ndi zogwirira ntchito pogwiritsa ntchito ma CD a BGA zimatha kuwonjezera mphamvu yosungiramo zinthu komanso liwiro la ntchito mopitirira 2.1.
5. Kukhazikika kwakukulu
Chifukwa cha kutambasuka kwa mapini kuchokera pakati pa chip mu phukusi la BGA, njira zotumizira ma siginecha osiyanasiyana zimafupikitsidwa bwino, zomwe zimachepetsa kuchepa kwa ma siginecha ndikuwonjezera liwiro la mayankho komanso kuthekera koletsa kusokoneza. Izi zimawonjezera kukhazikika kwa chinthucho.
6. Kutaya kutentha bwino
BGA imapereka mphamvu yabwino kwambiri yochotsera kutentha, pomwe kutentha kwa chip kumayandikira kutentha kozungulira panthawi yogwira ntchito.
7. Yosavuta kuikonzanso
Mapini a BGA amakonzedwa bwino pansi, zomwe zimapangitsa kuti zikhale zosavuta kupeza malo owonongeka kuti achotsedwe. Izi zimathandiza kukonzanso ma chips a BGA.
8. Kupewa chisokonezo cha mawaya
Kuyika ma power pins ambiri ndi ma ground pins pakati, ndi ma I/O pins omwe ali m'mphepete mwa msewu. Kukonza njira yoyendetsera galimoto kungachitike pa BGA substrate, kupewa mawaya osokonezeka a I/O pins.
Mphamvu Zopangira Kusonkhana kwa RichPCBA BGA
RICHPCBA ndi kampani yodziwika bwino padziko lonse lapansi yopanga ma PCB ndi ma PCB. Utumiki wopangira ma BGA ndi umodzi mwa mitundu yambiri yautumiki yomwe timapereka. PCBWay ingakupatseni BGA yabwino komanso yotsika mtengo yopangira ma PCB anu. Kutsika kochepa kwa BGA komwe tingathe kukulunga ndi 0.25mm 0.3mm.
Monga wopereka chithandizo cha PCB wokhala ndi zaka 20 akugwira ntchito yopanga, kupanga ndi kulumikiza ma PCB, RICHPCBA ili ndi mbiri yabwino kwambiri. Ngati mukufuna kulumikiza ma PCB, chonde musazengereze kutilankhulana nafe!