Ubuchwepheshe Bokwenza Ama-Chip e-ARM Kwama-Smartphones
Ukuthuthukiswa kwama-smartphone anamuhla kunqunywa kakhulu yintuthuko yama-processor (ama-SoC/System-on-Chips), okuyizinto “ezingqondo” zedivayisi. Ama-SoC amaningi adumile—njenge-Snapdragon, i-Dimensity, i-Exynos, ngisho ne-Apple Silicon—asebenzisa ukwakheka kwe-ARM njengesisekelo semiyalelo yawo kanye nomklamo we-CPU. Kodwa-ke, ukusebenza kahle kanye nokusebenza kahle akunqunywa kuphela ukwakheka kodwa futhi nangobuchwepheshe bokukhiqiza: inqubo yokukhiqiza ye-semiconductor eguqula imiklamo yesekethe ibe ama-chip angokoqobo kuma-silicon wafers. Lesi sihloko sixoxa ngendlela ubuchwepheshe bokukhiqiza ama-chip asekelwe ku-ARM kuma-smartphones buthuthuke ngayo, indlela inqubo esebenza ngayo, nokuthi kungani ama-node afana ne-7nm, 5nm, 4nm, kanye ne-3nm abe abaluleke kangaka.
1. I-ARM: Ukwakhiwa Kwezakhiwo vs “I-ARM Chip”
Okokuqala, ake sicacise: I-ARM akuyona umkhiqizi wama-chip. I-ARM (Arm Ltd.) ngokuyinhloko iklama amasethi emiyalelo yokwakhiwa (ama-ISA) kanye nama-IP cores afana ne-Cortex-A (ama-application CPU), i-Cortex-X (ukusebenza okuphezulu), i-Cortex-R (isikhathi sangempela), kanye nama-Mali GPU (kwamanye ama-SoC). Izinkampani ezifana ne-Qualcomm, i-MediaTek, i-Samsung, kanye ne-Apple bese kuthi:
- ukwakhiwa kwe-ARM okunikeza ilayisense,
– hlanganisa nezinye izingxenye (i-GPU, i-ISP, i-NPU, i-modem, i-cache, ukuxhumana),
– futhi bayikhiqize ngezindawo zokukhiqiza ezifana ne-TSMC noma i-Samsung Foundry.
Ngakho-ke uma abantu bethi “i-chip ye-ARM,” bavame ukusho i-smartphone SoC esebenzisa i-ARM ISA, kuyilapho inqubo yokukhiqiza yenziwa yi-semiconductor foundry.
2. Kungani Ubuchwepheshe Bokukhiqiza Bubalulekile?
Ubuchwepheshe bokwenza, obuvame ukubizwa ngokuthi i-process node (isb. 7 nm, 5 nm, 3 nm), buthinta izinto ezintathu eziyinhloko:
1. Ukusebenza: ama-transistors amancane ngokuvamile angashintsha ngokushesha.
2. Ukusebenza kahle kwamandla: izidingo zokuvuza kanye ne-voltage zingancishiswa, nakuba kungenjalo njalo ngokulandelana.
3. Ubuningi: ama-transistors amaningi endaweni ngayinye; kuvumela ama-cache amakhulu, ama-CPU ayinkimbinkimbi kakhulu, ama-GPU abanzi, kanye nama-accelerator e-AI anamandla kakhulu.
Kodwa-ke, inombolo ethi "nm" ayisameleli usayizi owodwa we-transistor ebonakalayo njengoba yayenza esikhathini esidlule. Ifana kakhulu negama le-node elihlobene nesethi yobuchwepheshe be-lithography, imithetho yokuklama, kanye nezici zobuningi/ukusebenza kahle.
3. Izigaba Eziyinhloko Zokwenziwa Kwe-Smartphone SoC
Ngokuvamile, uhambo oluvela ekwakhiweni kwama-chip kuya kumkhiqizo we-smartphone ludlula ezigabeni eziningana:
a) Umklamo Nokuqinisekiswa
Abathengisi be-SoC baklama amabhlogo e-IP (i-CPU, i-GPU, i-NPU), bese benza ukulingisa, ukuqinisekiswa kokusebenza, ukuqinisekiswa kwesikhathi (i-STA), kanye nokusayina ngokomzimba (i-DRC/LVS). Umklamo kumele uhambisane nekhithi yokuklama inqubo ye-node eqondiwe (i-PDK).
b) I-tape-out
I-tape-out yiphuzu lapho umklamo wokugcina uthunyelwa khona endaweni yokusungula ukuze wenziwe isethi yemaski (i-photomask). Lesi yisigaba esibizayo nesiyingozi: ukulungiswa komklamo ngemva kwe-tape-out kungasho izindleko ezinkulu kanye nokubambezeleka kweshejuli.
c) Ukukhiqizwa kwe-Wafer: Ngaphambili-Ekupheleni Komugqa (FEOL)
I-FEOL ukwakheka kwama-transistors ku-wafer—kusukela ekusebenziseni izidakamizwa, ukwakheka kwesiteshi, ukwakheka kwesango, ukuhlukaniswa, njalo njalo. Enkathini yanamuhla, izakhiwo ze-transistor zishintshe kusukela ku-planar kuya ku-FinFET (fin) futhi ziya ku-GAAFET (isango elizungezile).
d) Ukuxhumana: I-Back-End-of-Line (BEOL)
Uma ama-transistor esehlanganisiwe, izendlalelo zensimbi ezihlanganisiwe (i-dielectric yethusi/low-k) ziyangezwa ukuxhuma ama-transistor kwisekethe. Kuma-SoC anamuhla, inani lezingqimba zensimbi lingaba likhulu kakhulu ukuze kuhlangatshezwane nezidingo zokuhambisa idatha eningi.
e) Ukusika, Ukupakishwa, Nokuhlolwa
Ama-wafer asikwa abe ama-dies bese epakishwa. Kuma-smartphone, ukupakishwa kumele kusekele:
- usayizi omncane,
- ukushabalalisa ukushisa,
- ubuqotho besignali obuphezulu,
– ukusetshenziswa kwamandla okuphansi.
Izindlela ezifana ne-flip-chip, ukupakisha okusezingeni le-wafer, kanye nokuhlanganiswa kwe-PoP (Package-on-Package) zivame ukusetshenziswa.
4. I-Lithography: Isihluthulelo Sokunciphisa Ama-Transistors
I-Lithography inqubo "yokuphrinta" amaphethini wesekethe ku-wafer kusetshenziswa ukukhanya kanye ne-photoresist. Uma izici ezizophrintwa zincane, inqubo iba nzima kakhulu.
I-DUV vs i-EUV
– I-DUV (Deep Ultraviolet) isebenzisa ubude be-wavelength obungu-193 nm. Kuma-node amancane, i-DUV idinga amasu okusebenzisa amaphethini amaningi ayinkimbinkimbi futhi abizayo (ukwenza amaphethini kabili, kathathu, kane).
– I-EUV (Extreme Ultraviolet) isebenzisa ubude be-wavelength obungu-13,5 nm. I-EUV yenza kube lula ukuphrinta izici ezincane kakhulu, inciphisa inani lezinyathelo zokuphindaphinda, yandisa ukunemba, futhi ingase ithuthukise isivuno—yize izindleko zemishini ziphezulu kakhulu.
Ama-node okuqala e-7nm athembele kakhulu ekuphindaphindeni kwe-DUV, kuyilapho ama-5nm kanye ne-3nm ethembele kakhulu ku-EUV ezingqimbeni ezibaluleke kakhulu.
5. Ukuvela Kwesakhiwo Se-Transistor: I-Planar → I-FinFET → I-GAAFET
Iplanethi
Ama-transistor e-Planar ayenamandla afinyelela cishe ku-28 nm–20 nm. Njengoba ama-transistor ayeba mancane, ukulawulwa kwesango lesiteshi kwaba buthaka futhi ukuvuza kwanda.
I-FinFET
Ama-FinFET aletha "amaphiko" ngakho isango lilawula isiteshi kusuka ezinhlangothini eziningi. Lokhu kuthuthukisa ukulawulwa kwe-electrostatic futhi kuvimbela ukuvuza. Ama-SoC amaningi e-smartphone adumile ebangeni le-16/14 nm kuya ku-4 nm asasekelwe kuma-FinFET.
I-GAAFET (Gate-All-Around)
Ama-GAAFET amboza isiteshi ngokuphelele (isb., ama-nanosheet), anikeza ukulawula okungcono ngobukhulu obuncane kakhulu. Ukushintshela kuma-GAAFET kuyisinyathelo esibalulekile sama-node esizukulwane esilandelayo njengoba ama-FinFET eqala ukufinyelela imikhawulo yawo yokulinganisa.
Kuma-chip e-ARM e-smartphone, izinzuzo ze-GAAFET zizozwakala ekusebenzeni kahle kwamandla—okubalulekile empilweni yebhethri—kanye nokuzinza kokusebenza ngaphansi kwemithwalo esindayo (ukudlala imidlalo, i-AI kudivayisi, ukuqoshwa kwevidiyo kwe-4K/8K).
6. I-Process Node ku-Smartphone SoC
Nakuba imininingwane ihluka phakathi kwezindawo zokusekela, izitayela ezijwayelekile zimi kanje:
I-7 nm kanye nezinto eziphuma kuyo
Le node imele ukwenyuka okukhulu kobuningi nokusebenza kahle uma kuqhathaniswa ne-10nm/12nm. Ama-SoC amaningi e-7nm avula indlela yokusebenza kwe-GPU okuthuthukisiwe kanye nokuhlanganiswa kwemodemu okuyinkimbinkimbi.
5nm / 4nm
I-5nm isiqala ukubona ukwamukelwa kwe-EUV kusabalala kakhulu. I-"4nm" ivame ukubhekisela ekuthuthukisweni okungaphezu kwe-5nm ngokuthuthukiswa kobuningi, ukusebenza, noma ukulungiswa kokusebenza kahle. Kulesi sikhathi, izisheshisi ze-NPU/AI zikhula ngokushesha ngenxa yesidingo sokucutshungulwa kwamakhamera ekhompyutha kanye ne-AI elula ekhiqiza kudivayisi.
I-3 nm
I-3nm iyingqophamlando ebalulekile ekusebenzeni kahle kwamandla kanye nokuminyana kwawo. Kodwa-ke, izindleko zokukhiqiza ziyakhuphuka, ubunzima bokuklama buyanda, futhi ukuphathwa kokushisa kuya ngokuya kuba bucayi njengoba ama-transistor aqinile andisa izinselele zokushisa.
7. Isivuno, Ibhini, nokuthi Kungani Kunezinhlobo Eziningi Zama-Chip
Ekukhiqizweni ngobuningi, akuwona wonke ama-die ku-wafer aphelele. Isivuno yiphesenti lama-chips adlula izimfuneko. Abathengisi be-Foundries kanye ne-SoC benza okulandelayo:
- ukuhlolwa kohlobo lwe-wafer kanye nokusebenza kahle,
– ukuqoqwa kwekhwalithi (ukubopha) ngokusekelwe emandleni okuphindaphinda/i-voltage,
– ngezinye izikhathi khubaza amanye amayunithi (isb. amaqoqo athile e-GPU) ukuze kudayiswe izinhlobo ezahlukene.
Yingakho kunezinhlobo eziningana zama-SoC emakethe ezifanayo kodwa zisebenza ngendlela ehlukile, noma izinhlobo ze-“Plus/Pro” ezivela ezitsheni zekhwalithi ephezulu.
8. Umthelela Wokwenziwa Komklamo Wezakhiwo ze-ARM kuma-Smartphones
Ubuchwepheshe bokwenza buthonya indlela abathengisi abaklama ngayo ukucushwa kwe-ARM core, njenge-big.LITTLE noma i-DynamIQ: inhlanganisela yama-core asebenza kahle kakhulu nama-core anamandla aphansi. Ngama-node athuthukile kakhulu:
– ama-cores asebenza kahle kakhulu angasebenza ngokushesha ngamandla afanayo,
- ama-core asebenza kahle angonga kakhulu emisebenzini elula,
– i-cache ingandiswa ngaphandle kokukhulisa idayi ngokweqile,
- Ama-accelerator e-AI angangezwa ukuze kucutshungulwe ikhamera, izwi, kanye nezici zokukhiqiza.
Kodwa ama-node amancane nawo aletha izinselele: ukuvuza ngaphansi kwezimo ezithile, ukuhlukahluka kokukhiqiza, kanye nezidingo zomklamo wokulethwa kwamandla eziqinile.
9. Ukupakisha Nokuhlanganisa: Hhayi “nm” kuphela
Intuthuko yama-smartphone ayixhomekile kuma-transistors amancane kuphela, kodwa futhi nasekuhlanganisweni kwesistimu:
– I-PoP (Iphakheji Ephaketheni) yokufaka i-DRAM phezu kwe-SoC ukuze wonge isikhala.
- Ukupakisha okuthuthukisiwe kusiza ukuthuthukisa indlela yesiginali, i-bandwidth, kanye nokusebenza kahle.
– Umklamo wamandla kanye nokushisa (umklamo wamandla/ukushisa) kunquma ukusebenza okuqhubekayo, ikakhulukazi kwezemidlalo kanye nokuqoshwa kwevidiyo okude.
Nakuba imiqondo efana nama-chiplet ithola ukuthandwa emhlabeni we-PC/server, ukusetshenziswa kwayo kuma-smartphone kuyinselele kakhulu ngenxa yemikhawulo yesikhala, imikhawulo yezindleko, kanye nezidingo zamandla eziqinile. Noma kunjalo, imboni isavulekele ukuhlanganiswa okuhlakaniphile ngokwengeziwe.
10. Isiphetho
Ubuchwepheshe bokwenza buyisisekelo esivumela ama-chip asekelwe ku-ARM kuma-smartphones ukuthi asheshe, asebenzise kahle amandla, futhi acebe ngezici. Kusukela ku-DUV kuya ku-EUV lithography, kusukela kuma-transistors e-planar kuya ku-FinFET kuya ku-GAAFET, inqubekela phambili ngayinye yenqubo iletha izinguquko ezibalulekile kumakhono e-SoC: ukusebenza kwemidlalo, ikhwalithi yekhamera yokubala, i-AI kudivayisi, kanye nokusebenza kahle kwebhethri. Kodwa ngemuva kwenombolo "ye-nm" kulele iqiniso eliyinkimbinkimbi—izindleko eziphezulu zemaski, izinselele zokukhiqiza, ukwakheka kokushisa, kanye nemikhawulo yefiziksi ye-transistor. Uma sibheka phambili, inhlanganisela yama-node athuthukile, imiklamo yokwakha ye-ARM esebenza kahle kakhulu, kanye nokusungula izinto ezintsha zokupakisha kuzoqhubeka nokubumba isizukulwane esilandelayo sama-smartphones.
Uma ungathanda, ngingangeza isigaba esikhethekile esiqhathanisa izindima ze-TSMC vs Samsung Foundry, noma ngidale inguqulo yobuchwepheshe kakhulu yalesi sihloko (ngixoxa nge-BEOL, i-low-k, ukuguquguquka, ukwehla kwe-IR, kanye ne-clock/power gating) njengoba kudingeka.
