Ibikoresho bya Semiconductor na Epitaxy: Ishingiro rya tekiniki riri inyuma y'ibikoresho bya none by'amashanyarazi na RF

Iterambere mu ikoranabuhanga rya semiconductor rigenda risobanurwa cyane n'iterambere ryakozwe mu bice bibiri by'ingenzi:ibibanzanaibice bya epitaxialIbi bice bibiri bikorana kugira ngo bimenye imikorere y'amashanyarazi, ubushyuhe, n'ubwizerwe bw'ibikoresho bigezweho bikoreshwa mu modoka zikoresha amashanyarazi, sitasiyo za 5G, ibikoresho by'ikoranabuhanga bikoreshwa n'abaguzi, na sisitemu z'itumanaho zikoresha urumuri.

Nubwo substrate itanga urufatiro rufatika n'urutare, urwego rwa epitaxial rukora urwego rw'ibanze aho imikorere ya frequency nyinshi, ingufu nyinshi, cyangwa optoelectronic ikorwa. Guhuza kwabyo—guhuza kristale, kwagura ubushyuhe, n'imiterere y'amashanyarazi—ni ingenzi mu gukora ibikoresho bifite imikorere myiza, guhinduranya vuba, no kuzigama ingufu nyinshi.

Iyi nkuru isobanura uburyo substrates na epitaxial technologies bikora, impamvu bifite akamaro, n'uko bigira uruhare mu hazaza h'ibikoresho bya semiconductor nkaSi, GaN, GaAs, safiro, na SiC.

1. Ni ikiIgice cy'inyuma cya semiconductor?

Substrate ni "urubuga" rw'icyuma kimwe wubakiweho igikoresho. Gitanga inkunga y'imiterere, uburyo ubushyuhe bukwirakwira, n'icyitegererezo cya atome gikenewe kugira ngo epitaxial ikure neza.

Imirimo y'ingenzi y'ubutaka

• Inkunga ya mekanike:Bituma igikoresho gikomeza kuba gihamye mu miterere yacyo mu gihe cyo gutunganya no gukoresha.

• Icyitegererezo cya kristu:Iyobora urwego rwa epitaxial gukura hamwe n'utubumbe twa atome duhuye, ikagabanya inenge.

• Uruhare rw'amashanyarazi:Ishobora gutwara amashanyarazi (urugero, Si, SiC) cyangwa igakora nk'icyuma gikingira (urugero, safiro).

Ibikoresho bisanzwe byo munsi y'ubutaka

Uburyo Substrates zikorwa

1. Gusukura ibikoresho:Silikoni cyangwa ibindi bintu bitunganywa neza cyane.

2. Ikura ry'ikirahuri kimwe:

   • Czochralski (CZ)– uburyo bukunze gukoreshwa cyane kuri silikoni.

   • Agace ko mu mazi (FZ)– ikora kristu zifite ubuziranenge buhanitse cyane.

3. Gukata no gusiga irangi rya wafer:Boule zicibwamo wafer hanyuma zigasenwa neza kugeza ku buryo bworoshye bwa atome.

4. Isuku n'igenzura:Gukuraho imyanda no kugenzura ubucucike bw'inenge.

Imbogamizi za tekiniki

Ibikoresho bimwe na bimwe bigezweho—cyane cyane SiC—biragoye kubikora bitewe n’ikura rito cyane rya kristu (milimetero 0.3–0.5 gusa ku isaha), ibisabwa mu kugenzura ubushyuhe, ndetse no gutakaza byinshi mu gukata (igihombo cya SiC gishobora kugera kuri >70%). Ubu buryo bugoye ni imwe mu mpamvu zituma ibikoresho byo mu gisekuru cya gatatu bikomeza guhenda.

2. Urupapuro rwa Epitaxial ni iki?

Gutera urwego rwa epitaxial bivuze gushyira agace gato, gasukuye cyane, gafite ishusho imwe y'ikirahure ku gice cy'ubutaka gifite icyerekezo gihamye.

Urukuta rwa epitaxial rugenaimyitwarire y'amashanyarazicy'igikoresho cya nyuma.

Impamvu Epitaxy ari ingenzi

• Byongera ubuziranenge bwa kristu

• Ifasha porogaramu za doping zihariye

• Bigabanya ikwirakwira ry'ubusembwa mu butaka

• Ikora imiterere itandukanye y’imiterere nk’ingufu za quantum, HEMTs, na superlattices

Ikoranabuhanga Rikuru rya Epitaxy

Ibipimo by'ingenzi muri Epitaxy

• Ubunini bw'urutonde:Nanometero zo gukoresha amazi ya quantum, kugeza kuri μm 100 ku bikoresho by'amashanyarazi.

• Gukoresha imiti igabanya ubukana bw'ibiyobyabwenge:Ihindura ingano y'ibinyabiziga binyuze mu kwinjiza neza imyanda.

• Ubwiza bw'aho ukorera:Bigomba kugabanya kwimuka no guhangayika bituruka ku kudahuza neza kw'urukuta.

Imbogamizi muri Heteroepitaxy

• Kutahuza neza kw'amadirishya:Urugero, GaN na safiro ntibihuye na ~ 13%.

• Ubudasa bwo kwagura ubushyuhe:Bishobora gutera gucikagurika mu gihe cyo gukonjesha.

• Kugenzura neza inenge:Bisaba imiterere y'uturemangingo, imiterere y'uturemangingo, cyangwa imiterere y'uturemangingo.

3. Uburyo Substrate na Epitaxy bikora hamwe: Ingero zo mu buzima busanzwe

GaN LED kuri Safiro

• Safiro irahendutse kandi irinda ubushyuhe.

• Ibice by'ubushyuhe (AlN cyangwa GaN ifite ubushyuhe buke) bigabanya kudahuza kw'urukiramende.

• Amasumo menshi (InGaN/GaN) agize agace gatanga urumuri.

• Igera ku bucucike bw'inenge buri munsi ya cm⁻² 10 kandi ikagira urumuri rwinshi.

SiC Power MOSFET

• Ikoresha substrates za 4H-SiC zifite ubushobozi bwo kwangirika cyane.

• Ibice bya epitaxial drift (10–100 μm) bigena igipimo cy'amashanyarazi.

• Itanga igihombo kiri hasi cya ~90% cy'ingufu z'amashanyarazi ugereranyije n'ibikoresho by'amashanyarazi bya silikoni.

Ibikoresho bya GaN-on-Silicon RF

• Substrates za silicon zigabanya ikiguzi kandi zemerera guhuzwa na CMOS.

• Uduce twa nucleation ya AlN hamwe n'udupira twabugenewe bigenzura uburemere bw'imitsi.

• Ikoreshwa kuri chips za 5G PA zikora kuri frequencies za milimetero-wave.

4. Substrate vs. Epitaxy: Itandukaniro ry'ingenzi

5. Aho izi koranabuhanga zigana

Ingano nini z'amakaroni

• Si yimukira kuri santimetero 12

• SiC iva kuri santimetero 6 ijya kuri santimetero 8 (igabanuka rikomeye ry'ikiguzi)

• Ubunini bw'umurambararo butuma umusaruro usohoka kandi bugagabanya ikiguzi cy'igikoresho

Heteroepitaxy ihendutse

GaN-on-Si na GaN-on-safiro bikomeje kwiyongera nk'ibindi bisimbura ibikomoka kuri GaN bisanzwe bihenze.

Uburyo bwo Gukata no Gukura Buhanitse

• Gukata uduce dukonje bishobora kugabanya igihombo cya SiC kerf kuva kuri ~ 75% kugeza kuri ~ 50%.

• Imiterere myiza y'itanura yongera umusaruro wa SiC n'uburyo ikoreshwa.

Guhuza Imikorere ya Optical, Power, na RF

Epitaxy ituma amazi ya quantum, superlattice, n'ibice byashyizwemo ingufu bikenerwa mu gukora fotoniki zihujwe mu gihe kizaza ndetse n'ibikoresho by'ikoranabuhanga bikoresha ingufu nyinshi.

Umwanzuro

Substrates na epitaxy bigize urufatiro rw'ikoranabuhanga rwa semiconductors zigezweho. Substrate ishyiraho fondasiyo ifatika, ubushyuhe, na crystalline, mu gihe epitaxial layer igaragaza imikorere y'amashanyarazi ituma igikoresho gikora neza.

Uko icyifuzo kigenda cyiyongera kuriingufu nyinshi, inshuro nyinshi, n'imikorere myiza cyanesisitemu—kuva ku binyabiziga bikoresha amashanyarazi kugeza ku bigo by’amakuru—izi koranabuhanga zombi zizakomeza gutera imbere hamwe. Udushya mu bunini bwa wafer, kugenzura inenge, heteroepitaxy, no gukura kwa kristu bizahindura imiterere y’ibikoresho bya semiconductor n’imiterere y’ibikoresho bya semiconductor.