Cov Khoom Siv Ua Kom Thinning Wafer Rau 4 Nti-12 Nti Sapphire/SiC/Si Wafers Processing
Txoj Cai Ua Haujlwm
Cov txheej txheem thinning wafer ua haujlwm los ntawm peb theem:
Kev Sib Tsoo Tsis Ruaj: Lub log pob zeb diamond (qhov loj ntawm cov xuab zeb 200–500 μm) tshem tawm 50–150 μm ntawm cov khoom ntawm 3000–5000 rpm kom txo qhov tuab sai.
Kev Sib Tsoo Zoo: Lub log zoo dua (qhov loj ntawm cov xuab zeb 1–50 μm) txo qhov tuab mus rau 20–50 μm ntawm <1 μm/s kom txo qis kev puas tsuaj hauv qab av.
Kev Txhuam (CMP): Cov tshuaj lom neeg-mechanical slurry tshem tawm cov kev puas tsuaj seem, ua tiav Ra <0.1 nm.
Cov Khoom Siv Sib Xws
Silicon (Si): Tus qauv rau CMOS wafers, thinned mus rau 25 μm rau 3D stacking.
Silicon Carbide (SiC): Yuav tsum muaj cov log pob zeb diamond tshwj xeeb (80% pob zeb diamond concentration) rau kev ruaj khov thermal.
Sapphire (Al₂O₃): Nyias mus rau 50 μm rau kev siv UV LED.
Cov Cheebtsam Tseem Ceeb ntawm Lub Cev
1. Lub Tshuab Sib Tsoo
Lub Tshuab Sib Tsoo Ob Txoj Kab: Muab kev sib tsoo ntxhib/zoo sib xyaw ua ke hauv ib lub platform, txo lub sijhawm ua haujlwm los ntawm 40%.
Aerostatic Spindle: 0–6000 rpm ceev nrog <0.5 μm radial runout.
2. Lub Tshuab Ua Haujlwm Wafer
Lub Tshuab Nqus Tsev Chuck: >50 N tuav lub zog nrog ±0.1 μm qhov tseeb.
Caj Npab Neeg Hlau: Thauj cov wafers 4–12-nti ntawm 100 mm/s.
3. Lub kaw lus tswj hwm
Laser Interferometry: Kev soj ntsuam tuab tiag tiag (kev daws teeb meem 0.01 μm).
AI-Driven Feedforward: Kwv yees qhov hnav ntawm lub log thiab kho cov kev teeb tsa tau yam tsis tas siv neeg.
4. Kev Txias thiab Kev Ntxuav
Kev Ntxuav Ultrasonic: Tshem tawm cov khoom me me > 0.5 μm nrog 99.9% kev ua haujlwm zoo.
Dej Deionized: Txias lub wafer kom <5°C saum toj no ib puag ncig.
Cov txiaj ntsig tseem ceeb
1. Kev Ntsuas Siab Tshaj Plaws: TTV (Kev Hloov Pauv Thickness Tag Nrho) <0.5 μm, WTW (Kev Hloov Pauv Thickness Hauv Wafer) <1 μm.
2. Kev Sib Koom Ua Ke Ntau Txheej Txheem: Muab kev sib tsoo, CMP, thiab plasma etching ua ke hauv ib lub tshuab.
3. Kev Sib Piv ntawm Cov Khoom Siv:
Silicon: Txo qhov tuab ntawm 775 μm mus rau 25 μm.
SiC: Ua tiav <2 μm TTV rau RF daim ntawv thov.
Cov Wafers Doped: Cov wafers InP uas muaj phosphorus doped nrog <5% resistivity drift.
4. Kev Siv Tshuab Ntse: Kev koom ua ke ntawm MES txo qhov yuam kev ntawm tib neeg los ntawm 70%.
5. Kev Siv Hluav Taws Xob Zoo: Siv hluav taws xob tsawg dua 30% los ntawm kev nres tsheb rov qab.
Cov Ntawv Thov Tseem Ceeb
1. Kev Ntim Khoom Zoo Tshaj Plaws
• 3D ICs: Kev ua kom nyias nyias ntawm Wafer ua rau muaj kev sib sau ua ke ntawm cov logic/memory chips (piv txwv li, HBM stacks), ua tiav 10 × bandwidth siab dua thiab 50% txo kev siv hluav taws xob piv rau 2.5D cov kev daws teeb meem. Cov khoom siv txhawb nqa kev sib txuas sib xyaw thiab TSV (Through-Silicon Via) kev koom ua ke, qhov tseem ceeb rau AI/ML processors uas xav tau <10 μm interconnect pitch. Piv txwv li, 12-nti wafers nyias nyias mus rau 25 μm tso cai rau kev sib sau ua ke 8+ txheej thaum tswj hwm <1.5% warpage, qhov tseem ceeb rau cov kab ke LiDAR hauv tsheb.
• Kev Ntim Khoom Siv Cua Ntxuam: Los ntawm kev txo cov tuab ntawm wafer mus rau 30 μm, qhov ntev ntawm kev sib txuas luv dua 50%, txo qhov qeeb ntawm lub teeb liab (<0.2 ps/mm) thiab ua kom cov chiplets nyias nyias 0.4 hli rau cov SoCs txawb. Cov txheej txheem siv cov txheej txheem sib tsoo uas muaj kev ntxhov siab los tiv thaiv kev sib tsoo (>50 μm TTV tswj), ua kom ntseeg tau tias muaj kev ntseeg siab hauv cov ntawv thov RF zaus siab.
2. Cov Khoom Siv Hluav Taws Xob
• IGBT Modules: Kev nyias mus rau 50 μm txo qhov kev tiv thaiv thermal rau <0.5 ° C / W, ua rau 1200V SiC MOSFETs ua haujlwm ntawm 200 ° C qhov kub sib txuas. Peb cov khoom siv ntau theem sib tsoo (ntxhib: 46 μm grit → zoo: 4 μm grit) kom tshem tawm kev puas tsuaj hauv av, ua tiav >10,000 lub voj voog ntawm kev ntseeg siab thermal cycling. Qhov no yog qhov tseem ceeb rau EV inverters, qhov twg 10 μm-tuab SiC wafers txhim kho qhov hloov pauv ceev los ntawm 30%.
• Cov Khoom Siv Fais Fab GaN-on-SiC: Wafer thinning mus rau 80 μm txhim kho kev txav mus los ntawm hluav taws xob (μ > 2000 cm²/V·s) rau 650V GaN HEMTs, txo qhov poob ntawm kev sib txuas lus los ntawm 18%. Cov txheej txheem siv laser-assisted dicing los tiv thaiv kev tawg thaum lub sijhawm thinning, ua tiav <5 μm ntug chipping rau RF fais fab amplifiers.
3. Optoelectronics
• GaN-on-SiC LEDs: 50 μm sapphire substrates txhim kho kev ua haujlwm ntawm lub teeb (LEE) mus rau 85% (vs. 65% rau 150 μm wafers) los ntawm kev txo qis photon trapping. Peb cov khoom siv ultra-low TTV tswj (<0.3 μm) ua kom muaj kev sib npaug ntawm LED emission thoob plaws 12-nti wafers, qhov tseem ceeb rau Micro-LED zaub xav tau <100nm wavelength uniformity.
• Silicon Photonics: 25μm-tuab silicon wafers ua rau 3 dB/cm qis dua qhov poob ntawm kev nthuav dav hauv waveguides, qhov tseem ceeb rau 1.6 Tbps optical transceivers. Cov txheej txheem sib xyaw ua ke CMP smoothing los txo qhov roughness ntawm qhov chaw rau Ra <0.1 nm, txhim kho kev sib txuas ua ke los ntawm 40%.
4. MEMS Sensors
• Cov ntsuas kev nrawm: 25 μm silicon wafers ua tiav SNR >85 dB (vs. 75 dB rau 50 μm wafers) los ntawm kev nce qhov rhiab heev ntawm cov pov thawj-pawg hloov chaw. Peb lub tshuab sib tsoo ob-axis them rau cov kev ntxhov siab, kom ntseeg tau tias <0.5% qhov rhiab heev ntawm -40 ° C txog 125 ° C. Cov ntawv thov suav nrog kev kuaj pom kev sib tsoo hauv tsheb thiab kev taug qab AR / VR.
• Cov Sensors Siab: Kev nyias mus txog 40 μm ua rau muaj qhov ntsuas tau 0–300 bar nrog <0.1% FS hysteresis. Siv kev sib txuas ib ntus (iav nqa khoom), cov txheej txheem no zam kev tawg ntawm wafer thaum lub sijhawm etching sab nraub qaum, ua tiav qhov kev kam rau siab dhau <1 μm rau cov sensors IoT hauv kev lag luam.
• Kev Sib Koom Tes Txog Kev Siv Tshuab: Peb cov khoom siv wafer thinning sib koom ua ke kev sib tsoo tshuab, CMP, thiab plasma etching los daws cov teeb meem ntawm ntau yam khoom siv (Si, SiC, Sapphire). Piv txwv li, GaN-on-SiC xav tau kev sib tsoo sib xyaw (lub log pob zeb diamond + plasma) los sib npaug qhov nyuaj thiab kev nthuav dav thermal, thaum MEMS sensors xav tau qhov roughness ntawm qhov chaw qis dua 5 nm los ntawm CMP polishing.
• Kev Cuam Tshuam Hauv Kev Lag Luam: Los ntawm kev ua kom cov wafers nyias dua, ua tau zoo dua, cov thev naus laus zis no tsav cov kev tsim kho tshiab hauv AI chips, 5G mmWave modules, thiab cov khoom siv hluav taws xob yooj ywm, nrog TTV kev kam rau siab <0.1 μm rau cov zaub uas quav tau thiab <0.5 μm rau cov sensors LiDAR hauv tsheb.
Cov Kev Pabcuam ntawm XKH
1. Kev daws teeb meem tshwj xeeb
Cov Kev Teeb Tsa Uas Nthuav Tau: Cov qauv tsim chav 4–12-nti nrog kev thauj khoom/tso tawm tsis siv neeg.
Kev Txhawb Nqa Doping: Cov zaub mov txawv rau Er/Yb-doped crystals thiab InP/GaAs wafers.
2. Kev Txhawb Nqa Txhua Qhov Chaw
Kev Txhim Kho Cov Txheej Txheem: Kev sim dawb khiav nrog kev ua kom zoo dua.
Kev Kawm Thoob Ntiaj Teb: Cov kev cob qhia txog kev txawj txhua xyoo txog kev saib xyuas thiab kev daws teeb meem.
3. Kev Ua Khoom Siv Ntau Yam
SiC: Wafer thinning mus rau 100 μm nrog Ra <0.1 nm.
Sapphire: tuab 50μm rau UV laser qhov rais (transmittance > 92% @ 200 nm).
4. Cov Kev Pabcuam Ntxiv
Cov Khoom Siv Tau: Cov log pob zeb diamond (2000+ wafers/lub neej) thiab CMP slurries.
Xaus lus
Cov khoom siv wafer thinning no muab kev ua haujlwm raug, kev siv tau ntau yam khoom, thiab kev siv tshuab ntse, ua rau nws tseem ceeb rau kev sib koom ua ke 3D thiab cov khoom siv hluav taws xob. XKH cov kev pabcuam dav dav - txij li kev hloov kho mus rau kev ua tiav tom qab - xyuas kom cov neeg siv khoom ua tiav kev siv nyiaj tsawg thiab kev ua tau zoo hauv kev tsim khoom semiconductor.
