Lub Luag Haujlwm ntawm Dawb Fused Alumina hauv Polishing Electronic Components
Nyob rau lub caij nyoog no uas muaj cov xov tooj ntse, khoos phis tawj, thiab ntau yam khoom siv ntse, qhov kev xav tau ntawm kev ua haujlwm rau cov khoom siv hluav taws xob pheej nce ntxiv. Lawv yuav tsum ceev, me me, thiab muaj zog heev. Tej zaum koj yuav tsis paub tias kev ua tiav cov no xav tau ib kauj ruam uas zoo li tsis tseem ceeb tab sis tseem ceeb heev - kev txhuam kom du. Thiab hauv daim teb no, muaj ib tug "kws ua haujlwm hnyav" uas ua tiav ntsiag to -dawb fused alumina.
Niaj hnub no, cia peb qhia txog qhov tsis paub meej ntawm tus "kws ua tes ua taw" no thiab tham txog nws ua lub luag haujlwm tseem ceeb li cas hauv lub ntiaj teb kev ua haujlwm ntawm cov khoom siv hluav taws xob.
I. Kev Paub Txog Tus Neeg Tseem Ceeb: Dab tsi yog White Fused Alumina?
Hais yooj yim xwb, alumina dawb fused yog ib hom corundum uas muaj cov khoom siv hluavtaws uas huv heev. Nws cov khoom tseem ceeb yog α-alumina (Al₂O₃). Koj tuaj yeem piv rau nws cov kwv tij: piv txwv li, alumina xim av fused muaj cov khoom tsis huv ntau me ntsis, yog li nws cov xim av; thaum alumina dawb fused, vim nws cov khoom siv raw huv dua, tsim cov siv lead dawb tom qab hlawv, nrog rau cov qauv "huv dua".
Ua li cas thiaj ua tau? Hais yooj yim xwb, nws yog ib qho txheej txheem ntawm "kev yug dua tshiab los ntawm hluav taws." Zoo heevalumina hmoovyog yaj, txias, thiab recrystallized hauv lub cub tawg hluav taws xob kub siab tshaj 2000 degrees Celsius. Thaum kawg, nws raug tsoo thiab sieved kom tau txais cov khoom siv alumina fused dawb ntawm ntau qhov loj me sib txawv.
Tsis txhob saib tsis taus cov txheej txheem no; nws muab cov alumina fused dawb nrog ntau yam khoom tseem ceeb, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev txhuam cov khoom siv hluav taws xob:
Qhov nyuaj siab, "ruaj khov" tiag tiag: Nws qhov nyuaj ntawm Mohs yog siab txog 9.0, thib ob tsuas yog pob zeb diamond thiab silicon carbide. Qhov no txhais tau tias kev txiav thiab sib tsoo lwm yam khoom yog ib daim ncuav mog qab zib, thiab nws tsis yooj yim hnav nws tus kheej.
Kev tawv nruab nrab, qhov sib npaug ntawm qhov tawv thiab kev ywj pheej: Tsuas yog tawv xwb tsis txaus; brittle dhau, zoo li cov iav tawg, nws tawg ntawm qhov kov me me thiab siv tsis tau. Dawb fused alumina muaj ob qho tib si hardness siab thiab zoo toughness. Nyob rau hauv kev nyuaj siab, nws tuaj yeem tawg mus rau qib nruab nrab, qhia cov npoo ntse tshiab, es tsis txhob hloov mus ua hmoov - qhov no hu ua "self-sharpening." Qhov no zoo li rab riam me me kho nws tus kheej, tas li tswj nws qhov ntse.
Nws cov tshuaj lom neeg ruaj khov zoo heev ua rau nws "nyob twj ywm" heev: Ntau yam kua qaub thiab alkaline polishing feem ntau siv rau hauv cov txheej txheem polishing. Dawb fused alumina yog tshuaj ruaj khov heev thiab tsis yooj yim cuam tshuam nrog cov tshuaj lom neeg no, kom ntseeg tau tias cov txheej txheem polishing tsis ua rau muaj kev sib kis tshuaj lom neeg tsis raug cai. Qhov no tseem ceeb heev hauv kev lag luam hluav taws xob, qhov twg kev huv huv yog qhov tseem ceeb.
II. Alumina dawb fused "qhia tawm" li cas hauv kev txhuam cov khoom siv hluav taws xob?
Kev txhuam cov khoom siv hluav taws xob tsis yooj yim li tsuas yog so ib yam dab tsi ci ntsa iab xwb. Nws yog ib qho "kev kos duab" ua nyob rau hauv lub ntiaj teb me me, lub hom phiaj yog kom ua tiav qhov chaw tiaj tus, du thiab tsis puas tsuaj ntawm nanometer lossis txawm tias atomic level.Dawb fused aluminayog lub zog tseem ceeb hauv kev ua tiav qhov kev kos duab no.
1. Txoj haujlwm "leveling foundation" rau silicon wafers
Cov chips yog tsim los ntawm silicon wafers. Koj tuaj yeem xav tias yog tias lub hauv paus rau lub tsev tsis sib npaug, lub tsev yuav tsis tuaj yeem tsim tau, thiab cov xov hluav taws xob yuav raug khi tsis zoo. Lub hauv paus ntsiab lus tib yam siv rau kev tsim cov chips. Cov khaubncaws sab nraud povtseg raug teeb tsa ib txheej rau saum ib txheej. Yog tias muaj txheej twg tsis sib npaug, tom qab ntawd photolithography yuav poob qhov kev tsom mus rau, ua rau muaj kev sib txuas luv luv lossis qhib circuits.
Qhov no yog qhov uas CMP (Chemical Mechanical Polishing) thev naus laus zis los txog, thiab cov khoom me me ntawm alumina fused feem ntau ua lub luag haujlwm tseem ceeb hauv "kev ua haujlwm kho tshuab." Hauv cov slurry polishing, ntau cov khoom me me ntawm alumina fused dawb, zoo li ntau lab tus kws ua haujlwm me me, ua cov txiav me me thiab sib xws ntawm qhov chaw silicon wafer nyob rau hauv kev siab thiab kev tig. Lawv maj mam zom cov nplaim "peaks," thaum tseem khaws cov hav, thaum kawg ua tiav qhov tiaj tiaj. Qhov nyuaj thiab tus kheej-sharpening zog ntawm alumina fused dawb ua kom ntseeg tau tias cov txheej txheem no ua haujlwm tau zoo thiab sib xws.
2. Kev Ua Kom Tiav Ntawm Cov Khoom Siv Semiconductor
Sab hauv ib lub chip, ntxiv rau silicon, muaj cov hlau (xws li tooj liab thiab tungsten) siv rau cov kab hluav taws xob thiab cov txheej rwb thaiv tsev (xws li silicon dioxide) rau kev cais tawm. Cov ntaub ntawv sib txawv no muaj qhov nyuaj thiab qhov nrawm tshem tawm sib txawv. Thaum lub sijhawm polishing, cov hlau ntau dhau yuav tsum tau tshem tawm yam tsis ua rau cov txheej rwb thaiv tsev hauv qab puas tsuaj; qhov no hu ua "kev xaiv siab."
Cov hmoov av dawb fused alumina ua lub luag haujlwm tseem ceeb heev ntawm no. Los ntawm kev kho cov tshuaj lom neeg ntawm cov tshuaj polishing slurry (qhov "tshuaj lom neeg") thiab ua haujlwm synergistically nrog cov alumina dawb fused (qhov "mechanical"), nws ua tau kom tshem tawm cov khoom siv (xws li tooj liab) tau zoo heev thaum tsis tshua kov lwm yam khoom siv (xws li silicon dioxide). Qhov kev ntsuas qhov tseeb no yog qhov tseem ceeb rau kev ua kom cov chip yield.
3. Lub "Lub Hnub Qub Zoo Nkauj" ntawm Lwm Cov Khoom Siv Hluav Taws Xob
Ntxiv rau cov chips muaj qhov tseeb siab, ntau yam khoom siv hluav taws xob uas peb ntsib txhua hnub kuj vam khom rau kev ua kom dawb fused alumina polishing.
Cov Khoom Siv LED Sapphire: Ntau lub LEDs ci ntsa iab siv sapphire ua lawv cov khoom siv. Sapphire nws tus kheej muaj qhov nyuaj heev, xav tau alumina dawb fused - cov khoom siv "nyuaj-rau-nyuaj" - rau kev txhuam kom ua tiav qhov chaw du zoo li daim iav, ua kom lub teeb ci ntsa iab tshaj plaws thiab ua rau LED ci dua.
Quartz Crystal Resonators: Cov no yog cov khoom "lub plawv dhia" uas muab cov cim moos rau cov circuits. Lawv qhov kev xav tau ntawm qhov zaus ruaj khov yog siab heev, thiab lawv qhov zoo thiab tuab ntawm qhov chaw yuav tsum tau tswj hwm kom meej; kev txhuam hniav dawb fused alumina yog qhov zoo tshaj plaws rau txoj haujlwm no. Cov ntaub ntawv sib nqus, cov khoom siv iav, thiab lwm yam ntaub ntawv kuj xav taudawb fused aluminathaum lub sijhawm ua tiav kom ua tiav qhov kawg du thiab ci ntsa iab.
III. Vim li cas thiaj siv White Fused Alumina? - Kev piav qhia luv luv txog nws cov txiaj ntsig tshwj xeeb
Saib rov qab, ntawm ntau cov khoom siv abrasives, vim li cas kev lag luam hluav taws xob thiaj nyiam alumina fused dawb?
Kev Tswj Xyuas Qhov Tseeb: Nws cov khoom me me tuaj yeem ua kom zoo heev thiab sib xws (mus txog rau theem micrometer) nrog cov duab tsis tu ncua. Qhov no ua kom ntseeg tau tias qhov tshwm sim polishing kwv yees tau thiab sib xws, tiv thaiv kev khawb ntawm qhov chaw los ntawm qhov loj me ntawm cov khoom me me tsis sib xws.
Kev Ua Phem Tsawg Kawg Nkaus: Kev dawb huv siab txhais tau tias nws tsim cov hlau tsis huv me ntsis thaum lub sijhawm txhuam, ua tau raws li qhov yuav tsum tau ua kom huv ntawm kev lag luam semiconductor.
Kev Sib Npaug ntawm Kev Ua Haujlwm Zoo thiab Zoo: Nws tsis "nyuaj" thiab kim npaum li pob zeb diamond, thiab tsis ua haujlwm zoo npaum li cov khoom siv mos mos. Nws ua tiav qhov sib npaug zoo meej ntawm qhov nyuaj, kev tawv, thiab tus nqi, ua rau nws yog qhov kev xaiv uas pheej yig heev.
Yog li ntawd, lub sijhawm tom ntej koj khaws koj lub xov tooj thiab paub txog nws txoj kev ua haujlwm zoo thiab muaj zog, xav txog qhov no: sab hauv cov chips me me thiab cov khoom me me, ib qho "kev hloov pauv ntawm qhov chaw" uas ntsiag to thiab meej uas muaj ntau lub microparticles dawb fused alumina tau tshwm sim. Nws yog tus "craftsman hardcore," nrog nws qhov nyuaj thiab purity, uas tau tshem tawm qhov kawg nanometer-level barrier rau qhov tsis muaj kev cuam tshuam ntawm lub ntiaj teb hluav taws xob. Nws yuav tsis sawv hauv qhov chaw pom kev, tab sis nws yog ib tug hero tseem ceeb tom qab qhov xwm txheej. Kev nce qib ntawm thev naus laus zis feem ntau zais rau hauv cov ntsiab lus me me no, ci ntsa iab nrog qhov yooj yim tshaj plaws tab sis ntxim nyiam ntawm cov ntaub ntawv science.