Mfundo zazikuluzikulu za nkhaniyi
- BGA phukusi ndi yaying'ono mu kukula ndi mkulu pini kachulukidwe.
- M'maphukusi a BGA, kuphatikizika kwa siginecha chifukwa cha kusanja bwino kwa mpira kumatchedwa BGA crosstalk.
- BGA crosstalk imatengera komwe kuli siginecha yolowera ndi chizindikiro cha wozunzidwayo pamndandanda wamagulu a mpira.
Mu ma IC a zipata zambiri ndi ma pin-count, mulingo wophatikizika ukuwonjezeka kwambiri.Tchipisi izi zakhala zodalirika, zolimba, komanso zosavuta kugwiritsa ntchito chifukwa chopanga mapaketi amtundu wa mpira (BGA), omwe ndi ang'onoang'ono kukula ndi makulidwe komanso okulirapo pamapini.Komabe, BGA crosstalk imakhudza kwambiri kukhulupirika kwa siginecha, motero kumachepetsa kugwiritsa ntchito phukusi la BGA.Tiyeni tikambirane BGA ma CD ndi BGA crosstalk.
Mpira Grid Array Phukusi
Phukusi la BGA ndi phukusi lokwera pamwamba lomwe limagwiritsa ntchito timipira tating'onoting'ono tachitsulo kuti tiyike gawo lophatikizika.Mipira yachitsulo iyi imapanga gridi kapena chitsanzo cha matrix chomwe chimakonzedwa pansi pa chip ndikugwirizanitsa ndi bolodi losindikizidwa.
Phukusi la grid array (BGA).
Zipangizo zomwe zapakidwa mu BGAs zilibe mapini kapena otsogolera pamphepete mwa chip.M'malo mwake, gulu la gululi la mpira limayikidwa pansi pa chip.Magulu awa a gululi amatchedwa mipira ya solder ndipo amakhala ngati zolumikizira phukusi la BGA.
Ma Microprocessors, tchipisi ta WiFi, ndi ma FPGA nthawi zambiri amagwiritsa ntchito phukusi la BGA.Mu phukusi la BGA chip, mipira yogulitsira imalola kuti pakali pano kuyenda pakati pa PCB ndi phukusi.Mipira ya solder iyi imalumikizidwa mwakuthupi ndi gawo lapansi la semiconductor lamagetsi.Kulumikizana ndi lead kapena flip-chip kumagwiritsidwa ntchito kukhazikitsa kulumikizana kwamagetsi ku gawo lapansi ndikufa.Ma conductive alignments amapezeka mkati mwa gawo lapansi lolola kuti ma siginecha amagetsi aperekedwe kuchokera pamzere wapakati pa chip ndi gawo lapansi mpaka pamphambano pakati pa gawo lapansi ndi gululi la mpira.
Phukusi la BGA limagawira mayendedwe olumikizana pansi pa kufa mumtundu wa matrix.Kukonzekera kumeneku kumapereka chiwerengero chokulirapo cha zitsogozo mu phukusi la BGA kusiyana ndi phukusi lathyathyathya ndi mizere iwiri.Mu phukusi lotsogozedwa, zikhomo zimakonzedwa pamalire.pini iliyonse ya phukusi la BGA imanyamula mpira wa solder, womwe uli pamunsi pa chip.Kukonzekera kumeneku pamtunda kumapereka malo ochulukirapo, zomwe zimapangitsa kuti pakhale mapini ambiri, kutsekereza pang'ono, ndi zazifupi zotsogola zochepa.Mu phukusi la BGA, mipira yogulitsira imalumikizidwa kutali kwambiri kuposa phukusi lomwe lili ndi zitsogozo.
Ubwino wa phukusi la BGA
Phukusi la BGA lili ndi miyeso yaying'ono komanso kachulukidwe kakang'ono ka pini.phukusi la BGA lili ndi inductance yotsika, kulola kugwiritsa ntchito ma voltages otsika.Gulu la gululi la mpira ndi lotalikirana bwino, zomwe zimapangitsa kuti zikhale zosavuta kugwirizanitsa chipangizo cha BGA ndi PCB.
Ubwino wina wa phukusi la BGA ndi:
- Kutentha kwabwino kwa kutentha chifukwa cha kuchepa kwa kutentha kwa phukusi.
- Kutalika kotsogola mu phukusi la BGA ndi lalifupi kuposa mapaketi okhala ndi zitsogozo.Kuchuluka kwa otsogolera kuphatikizidwa ndi kukula kocheperako kumapangitsa phukusi la BGA kukhala labwino kwambiri, motero kuwongolera magwiridwe antchito.
- Phukusi la BGA limapereka magwiridwe antchito apamwamba pa liwiro lalitali poyerekeza ndi mapaketi athyathyathya komanso mapaketi apamizere awiri.
- Liwiro ndi zokolola za kupanga PCB kumawonjezeka mukamagwiritsa ntchito zida za BGA.Njira yowotchera imakhala yosavuta komanso yosavuta, ndipo ma phukusi a BGA amatha kukonzedwanso mosavuta.
BGA Crosstalk
Maphukusi a BGA ali ndi zovuta zina: mipira ya solder singakhoze kupindika, kuyang'ana kumakhala kovuta chifukwa cha kachulukidwe kakang'ono ka phukusi, ndi kupanga voliyumu yapamwamba kumafuna kugwiritsa ntchito zipangizo zogulitsira zodula.
Kuti muchepetse BGA crosstalk, dongosolo lotsika la BGA ndilofunika kwambiri.
Maphukusi a BGA nthawi zambiri amagwiritsidwa ntchito pazida zambiri za I/O.Zizindikiro zofalitsidwa ndi kulandiridwa ndi chip chophatikizika mu phukusi la BGA zitha kusokonezedwa ndi kulumikizidwa kwa mphamvu yazizindikiro kuchokera kutsogolo kupita kwina.Signal crosstalk yoyambitsidwa ndi kusanja bwino kwa mipira yogulitsira mu phukusi la BGA imatchedwa BGA crosstalk.Kukhazikika kocheperako pakati pa magulu amagulu a mpira ndi chimodzi mwazomwe zimayambitsa ma crosstalk pamaphukusi a BGA.Pamene ma transients amakono a I / O (zizindikiro zolowera) zimachitika pamatsogoleredwe a phukusi la BGA, kuwongolera komaliza pakati pa magulu amagulu a mpira omwe amagwirizana ndi chizindikiro ndi zikhomo zobwerera kumapangitsa kusokoneza kwamagetsi pagawo la chip.Kusokoneza kwamagetsi kumeneku kumayambitsa kuphulika kwa siginecha komwe kumatulutsidwa kuchokera mu phukusi la BGA ngati phokoso, zomwe zimapangitsa kuti pakhale phokoso.
M'mapulogalamu monga makina ochezera a pa Intaneti okhala ndi ma PCB okhuthala omwe amagwiritsa ntchito mabowo, BGA crosstalk ikhoza kukhala yofala ngati palibe njira zomwe zimatengedwa kuteteza mabowo.M'mabwalo oterowo, kutalika kwa mabowo oyikidwa pansi pa BGA kumatha kuyambitsa kulumikizana kwakukulu ndikupanga kusokoneza kowonekera.
BGA crosstalk imatengera komwe kuli siginecha yolowera ndi chizindikiro cha wozunzidwa mu gululi la mpira.Kuti muchepetse BGA crosstalk, makonzedwe otsika a BGA phukusi ndiofunikira.Ndi pulogalamu ya Cadence Allegro Package Designer Plus, opanga amatha kukhathamiritsa zovuta za single-die and multi-die wirebond ndi flip-chip mapangidwe;mayendedwe a radial, aang'ono-athunthu kuti athane ndi zovuta zapadera zamapangidwe agawo la BGA/LGA.ndi macheke achindunji a DRC/DFA kuti apeze njira zolondola komanso zoyenera.Macheke achindunji a DRC/DFM/DFA amaonetsetsa kuti mapangidwe a BGA/LGA apambana pakadutsa kamodzi.Kutulutsa mwatsatanetsatane kolumikizirana, kufananiza kwa phukusi la 3D, kukhulupirika kwa ma siginecha ndi kusanthula kwamafuta okhala ndi tanthauzo lamagetsi amaperekedwanso.
Nthawi yotumiza: Mar-28-2023