Fasahar Ƙirƙirar Chip na ARM don Wayoyin Salula
Ci gaban wayoyin komai da ruwanka na zamani galibi yana faruwa ne sakamakon ci gaban na'urori masu sarrafawa (SoCs/System-on-Chips), waɗanda sune "kwakwalwar" na'urar. Yawancin shahararrun SoCs - kamar Snapdragon, Dimensity, Exynos, har ma da Apple Silicon - suna amfani da tsarin ARM a matsayin tushe don umarnin CPU da ƙira. Duk da haka, aiki da inganci ba wai kawai ana ƙaddara su ta hanyar gine-gine ba har ma ta hanyar fasahar ƙira: tsarin kera semiconductor wanda ke canza ƙirar da'ira zuwa kwakwalwan zahiri akan wafers na silicon. Wannan labarin ya tattauna yadda fasahar kera guntu ta ARM don wayoyin komai da ruwanka ta bunƙasa, yadda tsarin ke aiki, da kuma dalilin da yasa nodes kamar 7nm, 5nm, 4nm, da 3nm suka zama masu mahimmanci.
1. ARM: Tsarin gini vs "ARM Chip"
Da farko, bari mu fayyace: ARM ba kamfanin kera guntu ba ne. ARM (Arm Ltd.) galibi yana tsara tsarin tsara umarni (ISAs) da kuma tushen IP kamar Cortex-A (CPUs na aikace-aikace), Cortex-X (babban aiki), Cortex-R (ainihin lokaci), da kuma Mali GPUs (a wasu SoCs). Kamfanoni kamar Qualcomm, MediaTek, Samsung, da Apple sannan:
- lasisin gine-ginen ARM,
- haɗa shi da sauran abubuwan haɗin (GPU, ISP, NPU, modem, cache, haɗin gwiwa),
– kuma a samar da shi ta hanyar masana'antun masana'antu kamar TSMC ko Samsung Foundry.
Don haka idan mutane suka ce "guntu na ARM," yawanci suna nufin wayar salula mai suna SoC wacce ke amfani da ARM ISA, yayin da ake yin aikin ƙera ta hanyar wani kamfanin samar da sinadarai na semiconductor.
2. Me yasa Fasahar Ƙirƙira take da Muhimmanci?
Fasahar ƙera, wacce aka fi sani da node process (misali 7 nm, 5 nm, 3 nm), tana shafar manyan abubuwa uku:
1. Aiki: ƙananan transistor gabaɗaya suna iya canzawa da sauri.
2. Ingancin wutar lantarki: ana iya rage buƙatun ɓuɓɓuga da ƙarfin lantarki, kodayake ba koyaushe ake yin layi ba.
3. Yawan aiki: ƙarin transistors a kowane yanki na naúra; yana ba da damar manyan caches, CPUs masu rikitarwa, GPUs masu faɗi, da kuma ƙarin masu haɓaka AI masu ƙarfi.
Duk da haka, lambar "nm" ba ta sake wakiltar girman transistor na zahiri ɗaya kamar yadda ta yi a baya ba. Yana da alaƙa da tsarin fasahar lithography, ƙa'idodin ƙira, da halayen yawan aiki/inganci.
3. Manyan Matakai na Ƙirƙirar Wayar Salula ta SoC
Gabaɗaya, tafiya daga ƙirar guntu zuwa samfurin wayar hannu tana tafiya matakai da yawa:
a) Zane & Tabbatarwa
Masu sayar da SoC suna tsara tubalan IP (CPU, GPU, NPU), sannan su yi kwaikwayon, tabbatar da aiki, tabbatar da lokaci (STA), da kuma tabbatar da zahiri (DRC/LVS). Dole ne ƙirar ta dace da kayan aikin ƙirar tsari na maƙasudin (PDK).
b) Fitar da tef
Tef ɗin fitarwa shine lokacin da ake aika ƙirar ƙarshe zuwa masana'antar don a yi ta da abin rufe fuska (photomask). Wannan mataki ne mai tsada da haɗari: gyare-gyaren ƙira bayan cire tef ɗin na iya haifar da manyan kuɗaɗen da jinkiri a jadawalin.
c) Samar da Wafer: Gaba-gaba-ƙarshen Layi (FEOL)
FEOL shine samuwar transistor a kan wafer—daga doping, samuwar tashoshi, samuwar ƙofofi, warewa, da sauransu. A zamanin yau, tsarin transistor ya samo asali daga planar zuwa FinFET (fin) kuma yana tafiya zuwa GAAFET (ƙofa-kowane-around).
d) Haɗin kai: Ƙarshen Layi na Baya (BEOL)
Da zarar an haɗa transistors ɗin, ana ƙara layukan ƙarfe masu tarawa (jan ƙarfe/ƙananan-k dielectric) don haɗa transistors ɗin cikin da'ira. A cikin SoCs na zamani, adadin layukan ƙarfe na iya zama babba don biyan buƙatun hanyar sadarwa mai yawa.
e) Ragewa, Marufi, da Gwaji
Ana yanka wafer ɗin zuwa gawayi sannan a naɗe su. Ga wayoyin komai da ruwanka, marufi dole ne ya kasance yana ɗauke da waɗannan abubuwan:
- ƙaramin girman,
- zubar da zafi,
- ingantaccen siginar,
– ƙarancin amfani da wutar lantarki.
Ana yawan amfani da dabarun kamar su flip-chip, wafer-level packaging, da kuma PoP (Package-on-Package) hadewa.
4. Lithography: Mabuɗin Rage Transistors
Lithography tsari ne na "buga" tsarin da'ira a kan wafer ta amfani da haske da kuma photoresist. Ƙaramin fasalin da za a buga, haka tsarin zai yi wahala.
DUV vs EUV
– DUV (Deep Ultraviolet) yana amfani da tsawon tsayin nm 193. Ga ƙananan ƙwayoyin cuta, DUV yana buƙatar dabarun yin zane-zane masu rikitarwa da tsada (zane-zanen ninki biyu, uku, da huɗu).
– EUV (Extreme Ultraviolet) yana amfani da tsawon tsayin 13,5 nm. EUV yana sauƙaƙa buga ƙananan fasaloli, yana rage yawan matakai masu tsari da yawa, yana ƙara daidaito, kuma yana iya inganta yawan amfanin ƙasa—kodayake farashin kayan aiki yana da yawa sosai.
Nau'ikan farko na 7nm sun dogara sosai akan tsarin DUV mai yawa, yayin da 5nm da 3nm suka fi dogara da EUV a cikin mafi mahimmancin yadudduka.
5. Juyin Tsarin Transistor: Planar → FinFET → GAAFET
Tsarin
Transistors na planar sun fi rinjaye har zuwa kimanin nm 28–20 nm. Yayin da transistors suka ƙara ƙanƙanta, ikon ƙofofin tashar ya yi rauni kuma zubewar ta ƙaru.
FinFET
FinFETs suna gabatar da "fins" don haka ƙofar tana sarrafa tashar daga ɓangarori da yawa. Wannan yana inganta ikon sarrafa wutar lantarki kuma yana hana ɓuɓɓugar ruwa. Yawancin shahararrun wayoyin salula masu amfani da wutar lantarki a cikin kewayon 16/14 nm zuwa 4 nm har yanzu suna dogara ne akan FinFETs.
GAAFET (Kofar-All-kewaye)
GAAFETs suna rufe tashar gaba ɗaya (misali, nanosheets), suna ba da ingantaccen iko a ƙananan girma. Sauyawa zuwa GAAFETs muhimmin mataki ne ga ƙwayoyin halittar ƙarni na gaba yayin da FinFETs suka fara isa ga iyakokin girmansu.
Ga wayoyin salula na ARM, fa'idodin GAAFET za a ji su a cikin ingancin wutar lantarki - mahimmanci ga rayuwar batir - da kuma kwanciyar hankali a cikin aiki a ƙarƙashin nauyi mai yawa (wasanni, AI akan na'urar, rikodin bidiyo na 4K/8K).
6. Tsarin aiki akan wayar salula SoC
Duk da cewa bayanai sun bambanta tsakanin masana'antun samar da kayayyaki, yanayin gabaɗaya shine kamar haka:
7 nm da abubuwan da suka samo asali
Wannan kushin yana wakiltar babban tsalle a cikin yawan aiki da inganci idan aka kwatanta da 10nm/12nm. Yawancin SoCs na 7nm suna buɗe hanya don inganta aikin GPU da haɗakar modem mai rikitarwa.
5 nm / 4 nm
5nm ya fara ganin karɓuwa daga EUV ya zama ruwan dare. "4nm" sau da yawa yana nufin haɓakawa sama da 5nm tare da ingantaccen yawan aiki, aiki, ko inganta inganci. A wannan zamanin, na'urorin haɓaka NPU/AI suna ƙaruwa cikin sauri saboda buƙatar sarrafa kyamara ta kwamfuta da kuma AI mai sauƙi na samar da na'urori.
3 nm
3nm muhimmin ci gaba ne ga ingancin wutar lantarki da yawanta. Duk da haka, farashin masana'antu yana ƙaruwa, sarkakiyar ƙira tana ƙaruwa, kuma kula da zafi yana ƙara zama mahimmanci yayin da transistors masu yawa ke ƙara ƙalubalen zafi.
7. Yawan amfanin ƙasa, Kwandon ajiya, da kuma dalilin da yasa akwai nau'ikan guntu da yawa
A fannin samar da kayayyaki da yawa, ba duk mayukan da ke kan wafer ba ne suka cika. Yawan amfanin ƙasa shine kashi na guntu da ya wuce ƙa'idodi. Masu sayar da kayayyaki na Foundries da SoC suna yin haka:
- gwajin aiki da kuma tantance wafer,
- rukuni mai inganci (binning) bisa ga ƙarfin mita/ƙarfin lantarki,
- wani lokacin kashe wasu na'urori (misali wasu rukunin GPU) don sayar da bambance-bambancen daban-daban.
Wannan shine dalilin da yasa akwai nau'ikan SoCs da yawa a kasuwa waɗanda suke kama da juna amma suna da aiki daban-daban, ko kuma nau'ikan "Plus/Pro" waɗanda suka fito daga kwandon shara masu inganci.
8. Tasirin Ƙirƙira Kan Tsarin Gine-gine na ARM a cikin Wayoyin Salula
Fasahar ƙera kayayyaki tana tasiri ga yadda masu siyarwa ke tsara saitunan ARM core, kamar big.LITTLE ko DynamIQ: haɗuwa da manyan cores masu aiki da ƙananan cores masu ƙarfi. Tare da ƙarin ci gaba na nodes:
- manyan abubuwan wasan kwaikwayo na iya gudu da sauri akan irin wannan iko,
- ingantattun abubuwan tsakiya na iya zama mafi araha ga ayyukan sauƙi,
- ana iya faɗaɗa cache ɗin ba tare da faɗaɗa girman murfin ba,
- Ana iya ƙara masu haɓaka AI don sarrafa kyamara, murya, da fasalulluka na samarwa.
Amma ƙananan hanyoyi kuma suna kawo ƙalubale: zubewar ruwa a ƙarƙashin wasu yanayi, bambancin masana'antu, da kuma buƙatun ƙira na samar da wutar lantarki mai tsauri.
9. Marufi da Haɗawa: Ba wai kawai "nm" ba
Ci gaban wayoyin komai da ruwanka ba wai kawai ya dogara ne akan ƙananan transistor ba, har ma da haɗin tsarin:
– PoP (Fakitin-kan-Package) don tara DRAM a saman SoC don adana sarari.
- Marufi mai zurfi yana taimakawa wajen inganta hanyar sigina, bandwidth, da inganci.
- Tsarin wutar lantarki da zafi (ƙirƙirar wutar lantarki/zafin zafi) yana ƙayyade aiki mai dorewa, musamman don wasanni da rikodin bidiyo mai tsawo.
Duk da cewa ra'ayoyi kamar chiplets suna samun karbuwa a duniyar PC/server, aiwatar da su a wayoyin komai da ruwanka ya fi wahala saboda karancin sarari, karancin farashi, da kuma tsananin buƙatun wutar lantarki. Duk da haka, masana'antar ta kasance a bude ga hadewa mai hankali.
10. Kesimpulan
Fasahar ƙera ita ce ginshiƙin da ke ba da damar kwakwalwan kwamfuta masu tushen ARM a cikin wayoyin komai da ruwanka su zama masu sauri, masu inganci, da kuma wadataccen fasali. Daga DUV zuwa lithography na EUV, daga transistors na planar zuwa FinFET zuwa GAAFET, kowane tsalle-tsalle na tsari yana kawo manyan canje-canje ga ƙarfin SoC: aikin wasanni, ingancin kyamara ta kwamfuta, AI na kan na'ura, da ingancin baturi. Amma a bayan lambar "nm" akwai wata gaskiya mai rikitarwa - tsadar abin rufe fuska, ƙalubalen samar da kayayyaki, ƙirar zafi, da iyakokin kimiyyar transistor. Idan aka duba gaba, haɗakar ƙarin na'urori masu ci gaba, ƙirar gine-ginen ARM masu inganci, da sabbin abubuwan da aka ƙirƙira za su ci gaba da tsara ƙarni na gaba na wayoyin komai da ruwanka.
Idan kuna so, zan iya ƙara wani sashe na musamman wanda ke kwatanta rawar TSMC da Samsung Foundry, ko ƙirƙirar sigar fasaha ta labarin (tattaunawa game da BEOL, low-k, bambancin, raguwar IR, da kuma agogo/ƙarfin wutar lantarki) kamar yadda ake buƙata.
