Iindaba - Zithini iWafer TTV, iBow, iWarp, kwaye Zilinganiswa Njani?

.Uluhlu lweeNcwadi

1. Iingcamango eziPhambili kunye neeMetriki

2. Iindlela zokulinganisa

3. Ukucutshungulwa kwedatha kunye neempazamo

4. Iimpembelelo zeNkqubo

Kwimveliso ye-semiconductor, ukufana kobukhulu kunye nokuthamba komphezulu we-wafers zizinto ezibalulekileyo ezichaphazela isivuno senkqubo. Iiparameter eziphambili ezifana ne-Total Thickness Variation (TTV), i-Bow (arcuate warpage), i-Warp (global warpage), kunye ne-Microwarp (nano-topography) zichaphazela ngokuthe ngqo ukuchaneka kunye nokuzinza kweenkqubo eziphambili ezifana nokugxila kwe-photolithography, i-chemical mechanical polishing (CMP), kunye ne-thin-film deposition.

Iingcamango eziPhambili kunye neeMetriki

I-TTV (Utshintsho loBukhulu obupheleleyo)

I-TTV ibhekisa kumahluko omkhulu wobukhulu kuyo yonke indawo ye-wafer ngaphakathi kwendawo yokulinganisa echaziweyo i-Ω (ngokuvamile ingabandakanyi iindawo zokukhupha umphetho kunye nemimandla ekufutshane neenotshi okanye iiflethi). Ngokwezibalo, i-TTV = max(t(x,y)) – min(t(x,y)). Igxila kubukhulu obufanayo be-substrate ye-wafer, eyahlukileyo kwi-surface roughness okanye i-thin-film uniformity.

Isaphetha

I-Bow ichaza ukuphambuka okuthe nkqo kwe-wafer center point ukusuka kwi-least-squares fitted reference plane. Amaxabiso amahle okanye angalunganga abonisa ukugoba okuphezulu okanye okusezantsi kwehlabathi.

I-Warp

I-Warp ilinganisa umahluko omkhulu phakathi kwe-peak-to-valley kuzo zonke iindawo zomphezulu ngokumalunga ne-reference plane, ivavanya ukuba i-wafer iyonke ithambile kangakanani kwimeko ekhululekileyo.

I-Microwarp

I-Microwarp (okanye i-nanotopography) ihlola ii-micro-undulations ezingaphezulu komhlaba ngaphakathi kweendawo ezithile ze-spatial wavelength ranges (umz., 0.5–20 mm). Nangona ii-amplitudes zincinci, ezi nguqu zichaphazela kakhulu ubunzulu be-lithography (DOF) kunye nokufana kwe-CMP.

Isakhelo seReferensi yoMlinganiselo

Zonke iimetrikhi zibalwa kusetyenziswa isiseko sejiyometri, ngesiqhelo iplane efakelwe izikwere ezincinci (iplane ye-LSQ). Ukulinganiswa kobukhulu kufuna ukulungelelaniswa kwedatha yomphezulu wangaphambili nowangasemva ngemiphetho ye-wafer, iinotshi, okanye iimpawu zokulungelelaniswa. Uhlalutyo lwe-microwarp lubandakanya ukuhluzwa kwendawo ukuze kukhutshwe izinto ezithile ezihambelana nobude be-wavelength.

Iindlela zokulinganisa

1. Iindlela zokulinganisa i-TTV

Iprofayili yoMphezulu oMbini
I-Fizeau Interferometry:Isebenzisa imiphetho yokuphazamisana phakathi kwendawo yokubhekisa kunye nomphezulu we-wafer. Ifanelekile kwiindawo ezigudileyo kodwa ithintelwe zii-wafer ezinkulu ezigobileyo.
I-White Light Scanning Interferometry (SWLI):Ilinganisa ubude obupheleleyo ngokusebenzisa ii-envelopes zokukhanya ezihambelana kancinci. Isebenza kakuhle kwiindawo ezifana nezitebhisi kodwa ithintelwa sisantya sokuskena ngoomatshini.
Iindlela zokuzifihla:Fumana isisombululo se-sub-micron ngemigaqo ye-pinhole okanye ye-dispersion. Ilungele iindawo ezirhabaxa okanye ezikhanyayo kodwa icotha ngenxa yokuskena kwenqaku ngenqaku.
Unxantathu weLaser:Impendulo ekhawulezayo kodwa enokubangelwa kukulahleka kokuchaneka ngenxa yokutshintsha kokukhanya komphezulu.

Ukudibanisa uThumelo/uBuchule
IiSensors zeCapacitance ezineeNtloko ezimbini: Ukubekwa kweesensors ngokulinganayo kumacala omabini kulinganisa ubukhulu njengo-T = L – d₁ – d₂ (L = umgama osisiseko). Ikhawuleza kodwa inovelwano kwiimpawu zezinto.
I-Ellipsometry/Spectroscopic Reflectometry: Ihlalutya ukusebenzisana kwezinto ezikhanyayo ukuze kufunyanwe ubukhulu befilimu encinci kodwa ayifanelekanga kwi-bulk TTV.

2. Umlinganiselo weSaw kunye neWarp

Ii-Multi-Probe Capacitance Arrays: Bamba idatha yobude obupheleleyo kwinqanaba elinomoya ukuze kwakhiwe ngokutsha ngokukhawuleza kwe-3D.
Iprojekthi yokukhanya okucwangcisiweyo: Iprofayili ye-3D ekhawulezayo kusetyenziswa ukubumba okubonakalayo.
I-Interferometry esezantsi: Imephu yomphezulu enesisombululo esiphezulu kodwa inovakalelo lokungcangcazela.

3. Umlinganiselo weMicrowarp

Uhlalutyo lweSapho lweSapho:

Fumana i-topography yomphezulu enesisombululo esiphezulu.
Ukubala uxinano lwamandla e-spectral (PSD) nge-2D FFT.
Faka izihluzi ze-bandpass (umz., 0.5–20 mm) ukuze wahlukanise ubude be-wavelengths obubalulekileyo.
Bala amaxabiso e-RMS okanye e-PV kwidatha ehluziweyo.

Ukulinganisa iVacuum Chuck:Iziphumo zokulinganisa ihlabathi lokwenyani ngexesha le-lithography.

Ukucutshungulwa kwedatha kunye nemithombo yeempazamo

Ukucubungula Indlela Yokusebenza

I-TTV:Lungelelanisa ii-coordinates zomphezulu ongaphambili/ongasemva, bala umahluko wobukhulu, kwaye uthabathe iimpazamo zenkqubo (umz., ukushukuma kobushushu).
.Isaphetha/I-Warp:Faka idatha ye-LSQ plane kubude; I-Bow = intsalela yenqaku eliphakathi, i-Warp = intsalela yencochoyi ukuya entlanjeni.
.I-Microwarp:Hlunga amaza omoya, ubale izibalo (RMS/PV).

Imithombo yeempazamo eziphambili

Izinto eziphathelele indalo:Ukungcangcazela (kubalulekile kwi-interferometry), ukuxinana komoya, ukushukuma kobushushu.
Imida yeSensor:Ingxolo yesigaba (i-interferometry), iimpazamo zokulinganisa ubude bomda (i-confocal), iimpendulo ezixhomekeke kwizinto (umthamo).
Ukuphathwa kweWafer:Ukungalingani komgca, ukungachaneki kwesigaba sokushukuma xa uthunga.

Impembelelo kwiNgxaki yeNkqubo

I-Lithography:I-microwarp yendawo inciphisa i-DOF, nto leyo ebangela utshintsho lwe-CD kunye neempazamo ze-overlay.
I-CMP:Ukungalingani kokuqala kwe-TTV kukhokelela kuxinzelelo lokupholisha olungalinganiyo.
Uhlalutyo loxinzelelo:Ukuguquka kweBow/Warp kubonisa indlela yokuziphatha koxinzelelo lobushushu/loomatshini.
Ukupakisha:I-TTV egqithisileyo idala izithuba kwiindawo zokudibanisa.

I-wafer yeSapphire ye-XKH

Ixesha leposi: Sep-28-2025

Zithini i-Wafer TTV, i-Bow, i-Warp, kwaye zilinganiswa njani?