Ukadaulo Wopanga Chip wa ARM wa Mafoni Anzeru
Kukula kwa mafoni amakono kumadalira kwambiri kupita patsogolo kwa ma processor (SoCs/System-on-Chip), omwe amagwira ntchito ngati "ubongo" wa chipangizocho. Ma SoC ambiri otchuka—monga Snapdragon, Dimensity, Exynos, komanso Apple Silicon—amagwiritsa ntchito kapangidwe ka ARM ngati maziko a malangizo ndi kapangidwe ka CPU yawo. Komabe, magwiridwe antchito ndi magwiridwe antchito zimatsimikiziridwa osati ndi kapangidwe kokha komanso ndi ukadaulo wopanga: njira yopangira ma semiconductor yomwe imasintha mapangidwe a ma circuit kukhala ma chips enieni pa ma silicon wafers. Nkhaniyi ikufotokoza momwe ukadaulo wopanga ma chip ochokera ku ARM wa mafoni a m'manja wasinthira, momwe njirayi imagwirira ntchito, komanso chifukwa chake ma node monga 7nm, 5nm, 4nm, ndi 3nm akhala ofunikira kwambiri.
1. ARM: Kapangidwe ka Nyumba vs "ARM Chip"
Choyamba, tiyeni tifotokoze bwino: ARM si wopanga ma chip. ARM (Arm Ltd.) makamaka imapanga ma instruction set architectures (ISAs) ndi ma IP cores monga Cortex-A (application CPUs), Cortex-X (high-performance), Cortex-R (real-time), ndi Mali GPUs (mu SoCs zina). Makampani monga Qualcomm, MediaTek, Samsung, ndi Apple panthawiyo:
- kapangidwe ka zilolezo za ARM,
- phatikizani ndi zigawo zina (GPU, ISP, NPU, modem, cache, interconnection),
- ndipo amapanga izi kudzera m'mafakitale monga TSMC kapena Samsung Foundry.
Choncho anthu akamanena kuti “chipu cha ARM,” nthawi zambiri amatanthauza foni ya SoC yomwe imagwiritsa ntchito ARM ISA, pomwe njira yopangira imachitika ndi fakitale yopanga zinthu za semiconductor.
2. N’chifukwa chiyani ukadaulo wopanga zinthu uli wofunika?
Ukadaulo wopanga zinthu, womwe nthawi zambiri umatchedwa process node (monga 7 nm, 5 nm, 3 nm), umakhudza zinthu zitatu zazikulu:
1. Magwiridwe antchito: ma transistors ang'onoang'ono nthawi zambiri amatha kusintha mwachangu.
2. Kugwiritsa ntchito bwino mphamvu: kutayikira ndi kufunika kwa magetsi kungachepe, ngakhale kuti nthawi zina sizingachepe molunjika.
3. Kuchulukana: ma transistors ambiri pa dera lililonse; kulola ma cache akuluakulu, ma CPU ovuta kwambiri, ma GPU akuluakulu, ndi ma accelerator amphamvu kwambiri a AI.
Komabe, nambala ya "nm" siimayimiranso kukula kwa transistor imodzi monga momwe inalili kale. Ndi dzina la node logwirizana ndi ukadaulo wa lithography, malamulo a kapangidwe, ndi mawonekedwe a kachulukidwe/kugwira ntchito bwino.
3. Magawo Aakulu Opangira Mafoni a SoC
Kawirikawiri, ulendo wochokera pakupanga ma chip kupita ku foni yam'manja umadutsa magawo angapo:
a) Kapangidwe ndi Kutsimikizira
Ogulitsa SoC amapanga ma IP blocks (CPU, GPU, NPU), kenako amachita simulation, functional verification, timing verification (STA), ndi physical sign-off (DRC/LVS). Kapangidwe kake kayenera kugwirizana ndi target node's process design kit (PDK).
b) Kutulutsa tepi
Kutulutsa tepi ndi pamene kapangidwe komaliza kamatumizidwa ku fakitale kuti kapangidwe ngati chigoba (photomask). Iyi ndi gawo lokwera mtengo komanso loopsa: kusintha kapangidwe kake pambuyo pa kutulutsa tepi kungatanthauze ndalama zambiri komanso kuchedwa kwa nthawi.
c) Kupanga Ma Wafer: Kutsogolo kwa Mzere (FEOL)
FEOL ndi kupangidwa kwa ma transistors pa wafer—kuyambira kugwiritsa ntchito mankhwala osokoneza bongo, kupangidwa kwa njira, kupangidwa kwa zipata, kudzipatula, ndi zina zotero. Mu nthawi yamakono, mapangidwe a transistors asintha kuchoka pa planar kupita ku FinFET (chipeto) ndipo akupita ku GAAFET (chipata-chozungulira).
d) Kulumikizana: Kumbuyo-Kumapeto kwa Mzere (BEOL)
Ma transistors akangosonkhanitsidwa, zigawo zachitsulo zoyikidwa (copper/low-k dielectric) zimawonjezedwa kuti zilumikize ma transistors mu circuit. Mu ma SoC amakono, chiwerengero cha zigawo zachitsulo chikhoza kukhala chachikulu kwambiri kuti chikwaniritse zosowa za deta yochuluka.
e) Kudula, Kuyika Mapaketi, ndi Kuyesa
Ma wafer amadulidwa kukhala ma dies kenako n’kupakidwa. Pa mafoni a m’manja, ma phukusi ayenera kukhala ndi:
- kukula kochepa,
- kutentha kotentha,
- kukhulupirika kwakukulu kwa chizindikiro,
- kugwiritsa ntchito mphamvu zochepa.
Njira monga flip-chip, wafer-level packaging, ndi PoP (Package-on-Package) integration zimagwiritsidwa ntchito nthawi zambiri.
4. Lithography: Chinsinsi cha Kuchepetsa Ma Transistors
Lithography ndi njira yosindikizira ma circuit pa wafer pogwiritsa ntchito kuwala ndi photoresist. Zinthu zosindikizidwa zikakhala zazing'ono, njirayo imakhala yovuta kwambiri.
DUV motsutsana ndi EUV
– DUV (Deep Ultraviolet) imagwiritsa ntchito kutalika kwa mafunde kwa 193 nm. Pa ma node ang'onoang'ono, DUV imafuna njira zovuta komanso zodula zopangira mapangidwe ambiri (mapangidwe awiri, atatu, anayi).
– EUV (Extreme Ultraviolet) imagwiritsa ntchito kutalika kwa mafunde kwa 13,5 nm. EUV imapangitsa kuti kusindikiza zinthu zazing'ono kwambiri kukhale kosavuta, imachepetsa kuchuluka kwa njira zopangira zinthu zambiri, imawonjezera kulondola, ndipo mwina imawonjezera phindu—ngakhale kuti mtengo wa zida ndi wokwera kwambiri.
Ma node oyambirira a 7nm ankadalira kwambiri DUV multipatterning, pomwe 5nm ndi 3nm zimadalira kwambiri EUV m'magawo ofunikira kwambiri.
5. Kusintha kwa Kapangidwe ka Transistor: Planar → FinFET → GAAFET
Planar
Ma transistors a Planar anali amphamvu kwambiri mpaka pafupifupi 28 nm–20 nm. Pamene ma transistors anali ang'onoang'ono, chiwongolero cha chipata cha njira chinachepa ndipo kutuluka kwa madzi kunawonjezeka.
FinFET
Ma FinFET amayambitsa "zipsepse" kotero chipata chimawongolera njira kuchokera mbali zosiyanasiyana. Izi zimathandizira kuwongolera kwa electrostatic ndikuletsa kutuluka kwa madzi. Ma SoC ambiri otchuka a mafoni a m'manja omwe ali pakati pa 16/14 nm ndi 4 nm akadali ozikidwa pa FinFETs.
GAAFET (Chipata Chozungulira Zonse)
Ma GAAFET amaphimba njira yonse (monga ma nanosheet), zomwe zimapereka ulamuliro wabwino pazing'onozing'ono kwambiri. Kusintha kupita ku ma GAAFET ndi sitepe yofunika kwambiri kwa ma node a m'badwo wotsatira pamene ma FinFET akuyamba kufika pamalire awo okulira.
Pa mafoni a ARM chips, ubwino wa GAAFET udzamveka bwino pogwiritsa ntchito mphamvu—chofunika kwambiri pa moyo wa batri—komanso kukhazikika kwa magwiridwe antchito pansi pa katundu wolemera (masewera, AI pa chipangizo, kujambula makanema a 4K/8K).
6. Njira Yogwirira Ntchito pa Smartphone SoC
Ngakhale kuti mfundo zimasiyana pakati pa mafakitale oyambira, zochitika zambiri ndi izi:
7 nm ndi zotumphukira zake
Node iyi ikuyimira kukwera kwakukulu mu kuchulukana ndi magwiridwe antchito poyerekeza ndi 10nm/12nm. Ma SoC ambiri a 7nm amatsegula njira yowonjezerera magwiridwe antchito a GPU komanso kuphatikiza modem kovuta.
5nm / 4nm
5nm ikuyamba kuona kugwiritsa ntchito EUV kukufalikira kwambiri. "4nm" nthawi zambiri imatanthauza kusintha kwa 5nm ndi kuchulukirachulukira kwa kachulukidwe, magwiridwe antchito, kapena magwiridwe antchito. Munthawi ino, ma accelerator a NPU/AI akuchulukirachulukira chifukwa cha kufunikira kwa makina owerengera makamera komanso kupanga ma AI opepuka pazida.
3 nm
3nm ndi gawo lofunika kwambiri pakugwiritsa ntchito bwino mphamvu komanso kuchulukana kwa magetsi. Komabe, ndalama zopangira zinthu zikukwera, zovuta pakupanga zikuwonjezeka, ndipo kasamalidwe ka kutentha kukukulirakulira pamene ma transistors okhuthala akuwonjezera mavuto pa kutentha.
7. Yield, Bin, ndi Chifukwa Chake Pali Mitundu Yambiri ya Chip
Pakupanga zinthu zambiri, si mitundu yonse ya ufa yomwe imapangidwa pa wafer yomwe ndi yangwiro. Kuchuluka kwa tchipisi ndi kuchuluka kwa tchipisi komwe kumakwaniritsa zofunikira. Makampani opanga zinthu ndi ogulitsa SoC amachita izi:
- kuyesa kwa mtundu wa wafer ndi magwiridwe antchito,
- kugawa bwino magulu (kusunga) kutengera mphamvu ya ma frequency/voltage,
- nthawi zina zimaletsa mayunitsi ena (monga magulu ena a GPU) kuti agulitse mitundu yosiyanasiyana.
Ichi ndichifukwa chake pali mitundu ingapo ya ma SoC pamsika omwe ali ofanana koma ali ndi magwiridwe antchito osiyanasiyana, kapena mitundu ya "Plus/Pro" yomwe imachokera ku zitini zapamwamba kwambiri.
8. Zotsatira za Kupanga pa Kapangidwe ka Mapangidwe a ARM mu Mafoni Anzeru
Ukadaulo wopanga umakhudza momwe ogulitsa amapangira ma core configurations a ARM, monga big.LITTLE kapena DynamIQ: kuphatikiza ma core ogwira ntchito kwambiri ndi ma core amphamvu ochepa. Ndi ma node apamwamba kwambiri:
- ma cores amphamvu kwambiri amatha kugwira ntchito mwachangu pa mphamvu yomweyo,
- ma cores ogwira ntchito bwino akhoza kukhala otchipa kwambiri pa ntchito zopepuka,
- cache ikhoza kukulitsidwa popanda kukulitsa die mopitirira muyeso,
- Ma accelerator a AI akhoza kuwonjezeredwa kuti agwiritsidwe ntchito pokonza kamera, mawu, komanso zinthu zina zopangira.
Koma ma node ang'onoang'ono amabweretsanso mavuto: kutayikira kwa madzi pansi pa mikhalidwe ina, kusiyanasiyana kwa kupanga, ndi zofunikira zolimba kwambiri pakupanga mphamvu.
9. Kuyika ndi Kuphatikiza: Osati “nm” yokha
Kupita patsogolo kwa mafoni a m'manja sikudalira kokha ma transistors ang'onoang'ono, komanso kuphatikiza kwa makina:
- PoP (Package-on-Package) kuti muyike DRAM pamwamba pa SoC kuti musunge malo.
- Ma phukusi apamwamba amathandiza kukonza njira ya chizindikiro, bandwidth, komanso magwiridwe antchito.
- Kapangidwe ka mphamvu ndi kutentha (kapangidwe ka mphamvu/kutentha) kumatsimikiza magwiridwe antchito okhazikika, makamaka pamasewera ndi kujambula makanema kwa nthawi yayitali.
Ngakhale kuti malingaliro monga ma chiplets akutchuka kwambiri padziko lonse la PC/server, kugwiritsa ntchito kwawo mafoni a m'manja n'kovuta kwambiri chifukwa cha kuchepa kwa malo, kuchepa kwa ndalama, komanso kufunikira kwa mphamvu zochepa. Komabe, makampaniwa akadali otseguka kuti agwirizane ndi zinthu mwanzeru kwambiri.
10. Kesimpulan
Ukadaulo wopanga zinthu ndi maziko omwe amalola ma chips ochokera ku ARM mu mafoni a m'manja kukhala othamanga kwambiri, ogwira ntchito bwino, komanso okhala ndi zinthu zambiri. Kuchokera ku DUV mpaka ku EUV lithography, kuchokera ku ma transistors opangidwa ndi pulaneti mpaka ku FinFET mpaka ku GAAFET, kusintha kulikonse kwa njira kumabweretsa kusintha kwakukulu ku mphamvu za SoC: magwiridwe antchito amasewera, khalidwe la kamera yowerengera, AI pa chipangizo, ndi magwiridwe antchito a batri. Koma kumbuyo kwa nambala ya "nm" kuli zenizeni zovuta - mtengo wokwera wa chigoba, zovuta zokolola, kapangidwe ka kutentha, ndi zofooka za fizikisi ya transistor. Poyang'ana mtsogolo, kuphatikiza kwa ma node apamwamba kwambiri, mapangidwe a zomangamanga za ARM ogwira ntchito bwino, ndi zatsopano zoyika zinthu zidzapitiliza kupanga mbadwo wotsatira wa mafoni a m'manja.
Ngati mukufuna, nditha kuwonjezera gawo lodziyimira loyerekeza ntchito za TSMC ndi Samsung Foundry, kapena kupanga mtundu waukadaulo wa nkhaniyi (kukambirana za BEOL, low-k, kusinthasintha, IR drop, ndi clock/power gating) ngati pakufunika.
