Xov Xwm - Wafer TTV, Bow, Warp, thiab Lawv Ntsuas Li Cas?

Cov Npe

1. Cov Ntsiab Lus Tseem Ceeb thiab Cov Ntsuas

2. Cov Txheej Txheem Ntsuas

3. Kev Ua Cov Ntaub Ntawv thiab Yuam Kev

4. Cov Kev Cuam Tshuam ntawm Cov Txheej Txheem

Hauv kev tsim khoom semiconductor, qhov tuab sib xws thiab qhov tiaj tiaj ntawm cov wafers yog cov yam tseem ceeb uas cuam tshuam rau cov txheej txheem tsim tawm. Cov yam ntxwv tseem ceeb xws li Total Thickness Variation (TTV), Bow (arcuate warpage), Warp (global warpage), thiab Microwarp (nano-topography) cuam tshuam ncaj qha rau qhov tseeb thiab kev ruaj khov ntawm cov txheej txheem tseem ceeb xws li photolithography focus, chemical mechanical polishing (CMP), thiab thin-film deposition.

Cov Ntsiab Lus Tseem Ceeb thiab Cov Ntsuas

TTV (Tag Nrho Thickness Variation)

TTV yog hais txog qhov sib txawv ntawm qhov tuab tshaj plaws thoob plaws tag nrho cov nplaim wafer hauv thaj chaw ntsuas Ω (feem ntau tsis suav nrog cov cheeb tsam tsis suav nrog ntug thiab thaj chaw ze ntawm notches lossis flats). Hauv lej, TTV = max(t(x,y)) - min(t(x,y)). Nws tsom mus rau qhov sib npaug ntawm cov tuab ntawm cov substrate wafer, sib txawv ntawm qhov roughness ntawm qhov chaw lossis cov yeeb yaj kiab nyias.

Lub pob

Bow piav qhia txog qhov sib txawv ntawm qhov chaw nruab nrab ntawm lub wafer los ntawm lub dav hlau siv tsawg kawg nkaus. Cov nqi zoo lossis tsis zoo qhia txog qhov nkhaus thoob ntiaj teb nce lossis nqis.

Ua kom nkhaus

Warp ntsuas qhov sib txawv ntawm qhov siab tshaj plaws ntawm lub ncov mus rau hav dej hla txhua qhov chaw nto piv rau lub dav hlau siv, ntsuas qhov tiaj tiaj ntawm lub wafer hauv lub xeev dawb.

Microwarp

Microwarp (lossis nanotopography) tshuaj xyuas qhov chaw me me ntawm cov duab hauv qhov chaw tshwj xeeb (piv txwv li, 0.5–20 hli). Txawm hais tias muaj qhov loj me me, cov kev hloov pauv no cuam tshuam rau qhov tob ntawm kev tsom mus rau lithography (DOF) thiab CMP kev sib xws.

Kev Ntsuas Cov Qauv Siv

Txhua qhov kev ntsuas raug suav los ntawm kev siv lub geometric baseline, feem ntau yog lub least-squares fitted plane (LSQ plane). Kev ntsuas tuab yuav tsum tau sib phim cov ntaub ntawv ntawm pem hauv ntej thiab nraub qaum los ntawm cov npoo wafer, notches, lossis cov cim sib phim. Kev tshuaj xyuas Microwarp suav nrog kev lim dej kom rho tawm cov khoom tshwj xeeb ntawm wavelength.

Cov txheej txheem ntsuas

1. Cov Txheej Txheem Ntsuas TTV

Kev ntsuas qhov chaw ob sab
Fizeau Interferometry:Siv cov ciam teb cuam tshuam ntawm lub dav hlau siv thiab qhov chaw ntawm lub wafer. Haum rau cov chaw du tab sis txwv los ntawm cov wafer loj-curvature.
Kev Ntsuas Lub Teeb Dawb (SWLI):Ntsuas qhov siab kawg nkaus los ntawm kev siv lub teeb ci qis qis. Siv tau zoo rau cov nto zoo li kauj ruam tab sis raug txwv los ntawm kev ceev ntawm kev luam theej duab.
Cov Txheej Txheem Confocal:Ua tiav qhov kev daws teeb meem sub-micron los ntawm kev siv cov txheej txheem pinhole lossis dispersion. Zoo tagnrho rau cov chaw ntxhib lossis pob tshab tab sis qeeb vim yog kev luam theej taw tes.
Kev ntsuas peb sab ntawm laser:Cov lus teb sai tab sis nws yooj yim poob qhov tseeb los ntawm kev hloov pauv ntawm qhov chaw.

Kev Sib Txuas Lus / Kev Xav
Cov Sensors Capacitance Ob Lub Taub Hau: Kev tso cov sensors sib npaug ntawm ob sab ntsuas qhov tuab li T = L – d₁ – d₂ (L = qhov deb ntawm qhov pib). Ceev tab sis rhiab rau cov khoom siv.
Ellipsometry/Spectroscopic Reflectometry: Tshuaj xyuas kev sib cuam tshuam ntawm lub teeb thiab cov khoom rau qhov tuab ntawm zaj duab xis nyias tab sis tsis haum rau kev siv TTV ntau.

2. Kev Ntsuas Hneev thiab Warp

Cov Arrays Capacitance Arrays ntau-Probe: Sau cov ntaub ntawv qhov siab tag nrho ntawm theem cua rau kev tsim kho 3D sai.
Kev Tsim Lub Teeb Pom Kev: Kev tsim cov duab 3D ceev ceev siv kev tsim kho qhov muag.
Low-NA Interferometry: Kev kos duab ntawm qhov chaw muaj kev daws teeb meem siab tab sis rhiab heev rau kev co.

3. Kev Ntsuas Microwarp

Kev Tshawb Fawb Txog Qhov Chaw Zaus:

Tau txais qhov kev daws teeb meem siab ntawm qhov chaw saum npoo av.
Xam lub zog spectral density (PSD) ntawm 2D FFT.
Siv cov lim dej bandpass (piv txwv li, 0.5–20 hli) los cais cov wavelengths tseem ceeb.
Xam cov nqi RMS lossis PV los ntawm cov ntaub ntawv lim.

Kev Simulation ntawm Lub Tshuab Nqus Tsev:Ua raws li cov teebmeem clamping hauv ntiaj teb tiag tiag thaum lub sijhawm lithography.

Kev Ua Cov Ntaub Ntawv thiab Qhov Yuam Kev

Kev ua haujlwm ua haujlwm

TTV:Sib phim cov kev sib koom ua ke ntawm qhov chaw pem hauv ntej/tom qab, xam qhov sib txawv ntawm tuab, thiab rho tawm cov kev ua yuam kev tsis tu ncua (piv txwv li, kev hloov pauv ntawm cua sov).
Hneev/Warp:Haum LSQ lub dav hlau rau cov ntaub ntawv qhov siab; Bow = qhov chaw nruab nrab seem, Warp = qhov seem ntawm lub ncov mus rau hav.
Microwarp:Lim cov zaus ntawm qhov chaw, suav cov ntaub ntawv txheeb cais (RMS/PV).

Cov Qhov Yuam Kev Tseem Ceeb

Cov yam ntxwv ib puag ncig:Kev co (qhov tseem ceeb rau kev cuam tshuam), cua turbulence, thermal drift.
Cov Kev Txwv ntawm Sensor:Suab nrov theem (interferometry), qhov yuam kev calibration wavelength (confocal), cov lus teb nyob ntawm cov khoom siv (capacitance).
Kev Tswj Xyuas Wafer:Kev tsis sib haum ntawm ntug kev tshem tawm, qhov tsis raug ntawm theem kev txav mus los hauv kev xaws.

Kev cuam tshuam rau qhov tseem ceeb ntawm cov txheej txheem

Lithography:Kev sib txuas ntawm lub microwarp hauv zos txo DOF, ua rau CD hloov pauv thiab qhov yuam kev overlay.
CMP:Thaum pib TTV tsis sib npaug ua rau muaj kev sib txhuam tsis sib xws.
Kev Tshawb Fawb Txog Kev Nyuaj Siab:Kev hloov pauv ntawm Bow/Warp qhia txog tus cwj pwm kev ntxhov siab thermal/mechanical.
Ntim:TTV ntau dhau ua rau muaj qhov tsis sib xws hauv cov interfaces sib txuas.

XKH lub Sapphire Wafer

Lub sijhawm tshaj tawm: Cuaj hlis-28-2025

Wafer TTV, Bow, Warp, thiab lawv ntsuas li cas?