Lub plasma hnyav nyob rau hauv lub semiconductor etch chamber strips silicon nrog ib tug npau taws ntawm reactive halogen gases -fluorine, chlorine, bromine. Cov pa tawm ntawm lub chamber no yog qhov kub, corrosive, thiab particle-laden kwj uas yuav tsum tau ua kom txias ua ntej nws tuaj yeem txhuam tau zoo. Lub tshav kub exchanger uas ua rau lub siab phem pem hauv ntej-kab cua txias yog tsis cuam tshuam nrog ib tug yooj yim, ib tug acid; nws yog da dej hauv chaotic, mix-halogen cocktail uas yuav devour tej hlau. Ib qho PTFE exchanger yog tshuaj tiv thaiv kab mob rau qhov kev pabcuam ntuj raug txim.

Plasma Etch Exhaust: Ib qho tshuaj lom neeg kwj

Hauv cov cuab yeej semiconductor plasma etch, reactive ions thiab nruab nrab radicals yog tsim los ntawm pub gases xws li CF₄, CHF₃, Cl₂, BCl₃, thiab HBr. Cov tsiaj no etch silicon dioxide, silicon nitride, los yog hlau txheej nrog siab anisotropy. Cov dej ntws tawm ntawm cov txheej txheem chamber yog:

Unreacted halogen gases:Chlorine (Cl₂), bromine (Br₂), fluorine (F₂), thiab interhalogen compounds.

Byproduct halides:SiCl₄, SiF₄, BCl₃, AlCl₃, thiab lwm yam hlau halides.

Solid particulate byproducts:Tsis-volatile residues xws li silicon oxides, aluminium fluoride, thiab photoresist tshauv.

Hydrogen halides:HCl, HBr, thiab HF tsim thaum muaj dej noo los yog thaum lub sij hawm ntxuav chamber.

Qhov tso cua sov feem ntau yog li ntawm 50℃mus rau qis dua 100 degree, nyob ntawm tus txheej txheem daim ntawv qhia thiab qhov taw tes ntawm kev ntsuas. Cov kwj deg feem ntau saturated nrog corrosive vapors thiab muaj cov nplaum nplaum, polymerized residues uas tuaj yeem ua rau cov pa hluav taws kub sib txawv. Txhua lub tshuab hluav taws xob hlau hluav taws xob yuav raug kev cuam tshuam nrawm nrawm, pitting, thiab kev ntxhov siab corrosion tawg nyob rau hauv ntau qhov chaw halogen no.

Lub PTFE Exchanger ua cov tshuaj tiv thaiv kab mob

A PTFE exchanger plasma etch tso cua txiasLub kaw lus feem ntau yog teeb tsa raws li lub plhaub-thiab-lub raj cua kub exchanger nrog cov pa kub, corrosive tso pa ntws los ntawm PTFE hlab thiab dej txias (chaw dej siv dej lossis dej txias) ntws ntawm lub plhaub sab. Qhov kev npaj no tso cov kwj dej hauv cov hlab ntsha, qhov twg cov khoom siv PTFE yog inert kiag li rau tag nrho cov halogens, halogenated byproducts, thiab mineral acids. Cov dej txias, uas tsis yog corrosive, hu rau sab nrauv ntawm PTFE hlab thiab lub plhaub hlau (feem ntau lined nrog PTFE los yog lwm yam fluoropolymer rau kev tiv thaiv ntxiv).

PTFE tube bundles muaj ntau yam tseem ceeb hauv qhov kev pabcuam no:

Universal tshuaj tiv thaiv:PTFE tsis raug cuam tshuam los ntawm fluorine, chlorine, bromine, hydrogen halides, thiab feem ntau fluorocarbon tebchaw. Nws tsis corrode, qhov, los yog leach hlau ions rau hauv cov kwj deg.

Smooth, non-stick nto:Lub zog qis ntawm PTFE tiv thaiv qhov adhesion ntawm nplaum, polymerized residues (xws li, fluorocarbon polymers lossis photoresist byproducts). Cov residues zoo li flake tawm ntau dua li sib sau ua ke, tswj kev hloov pauv hluav taws xob.

Flexible tube siv:PTFE raj muaj qee qhov yooj. Thaum raug kev co, thermal cycling, los yog gas pulsations, cov hlab flex me ntsis, uas yuav pab tshem tawm cov khoom uas tej zaum yuav tsis nyob rau saum npoo. Vertical orientation ntawm exchanger ntxiv txhim khu particle shedding los ntawm lub ntiajteb txawj nqus.

Tsis muaj hlau ion paug:Cov tshuab nqus dej hauv qab thiab lub tshuab nqus tsev yog tiv thaiv los ntawm cov hlau halide deposits uas tuaj yeem ua rau hnav lossis tsim cov khib nyiab pov tseg.

Lub PTFE cooler yog ib qho yooj yim, chemically inert ntsws ntsws, ua pa kub, lom, thiab abrasive ua tsis taus pa ntawm lub plasma etch, thiab ua pa tawm ib tug txias, huv si kwj uas muaj kev nyab xeeb los ntawm downstream scrubbing system.

Tsim cov yam ntxwv rau kev ua haujlwm ntseeg tau

Vertical Orientation rau Particle Shedding

Feem ntau PTFE exchangers siv nyob rau hauv plasma etch tso cua txias yog oriented vertically, nrog cov roj kub nkag rau saum lossis hauv qab. Lub plhaub ntsug-thiab-lub raj tsim tso cai rau lub ntiajteb txawj nqus los pab tshem tawm cov khoom seem. Cov khoom uas nyob rau ntawm qhov chaw sab hauv ntawm PTFE cov hlab yuav poob qis, tshwj xeeb tshaj yog thaum cov roj ntws tsis sib xws los yog thaum lub tshuab hloov pauv tau purged nrog nitrogen thaum lub sij hawm tu. Kab rov tav tsim raug zam vim tias lawv tso cai rau cov khoom sib sau ua ke hauv qhov qis ntawm cov raj, thaum kawg thaiv cov roj ntws thiab txo qhov ua haujlwm txias.

Gas-Side Configuration

Cov pa corrosive feem ntau yog dhau los ntawm lub raj sab, thaum cov dej txias ntws los ntawm lub plhaub sab. Qhov kev xaiv no yog txhob txwm tshaj tawm:

Tube sab tu:PTFE raj tuaj yeem ntxuav tau mechanically (piv txwv li, los ntawm pigging lossis flushing) los yog tshuaj lom neeg (xws li, los ntawm lub sij hawm dilute acid recirculation) yam tsis tau nthuav tawm cov khoom siv plhaub rau cov neeg ua phem.

Pressure Containment:Cov PTFE hlab tsis yog lub siab-cov kabmob zoo ib yam li cov raj hlau. Txawm li cas los xij, lub plhaub (feem ntau yog cov hlau tsis muaj fluoropolymer hauv ob sab phlu) muaj cov dej txias txias, uas feem ntau yog nruab nrab (3-5 bar). Cov pa tso pa feem ntau nyob ze ntawm huab cua lossis qhov tsis zoo me ntsis (lub tshuab nqus tsev los ntawm cov twj tso kua mis qis).

Compact footprint

Semiconductor fabs yog qhov chaw txwv. PTFE exchangers rau daim ntawv thov no yog tsim los nrog high tube ceev (me me txoj kab uas hla, feem ntau 4-10 mm ID) kom ua kom kub hloov mus rau hauv ib tug tsawg ntim. Finned PTFE hlab yog qee zaum siv los txhim kho cov roj-sab tshav kub hloov pauv coefficient, uas yog qhov tsis tshua muaj vim tsis muaj thermal conductivity ntawm PTFE thiab cov roj-theem ntws.

Daim Ntawv Ceeb Toom Txog Kev Nyab Xeeb: Kev Tiv Thaiv Kev Tiv Thaiv thiab Kev Tshawb Fawb

Cov pa tawm los ntawm cov cuab yeej plasma etch yog tshuaj lom heev thiab feem ntau pyrophoric thaum qee cov hlau hydrides (xws li, silane) muaj nyob rau hauv cov kauj ruam tu chamber. Yog li ntawd, txhua tus PTFE exchanger siv nyob rau hauv qhov kev pab cuam no yuav tsum tau raws li nruj me ntsis kev ruaj ntseg cov cai:

Secondary Containment:Lub exchanger yuav tsum tau ntsia nyob rau hauv ib tug ventilated, leak-containment enclosure. Yog tias lub raj PTFE tsis ua haujlwm (tsis tshua muaj, tab sis ua tau vim yog kev puas tsuaj los yog kub dhau), cov roj corrosive tuaj yeem nkag mus rau hauv lub voj voog dej txias lossis ib puag ncig ib puag ncig. Ib lub plhaub thib ob lossis ob-walled kev tsim kho nrog kev saib xyuas interstitial yog pom zoo. Rau kev teeb tsa tseem ceeb tsawg dua, lub ntsuas hluav taws xob xau (xws li, lub tshuab hluav taws xob halogen) tau muab tso rau hauv lub hood uas kaw qhov sib pauv.

Kev ntsuam xyuas dej tsis zoo:Ua ntej kev teeb tsa thiab ntawm lub sijhawm teem sijhawm (xws li, ib xyoos ib zaug lossis ib txoj cai tswjfwm kev nyab xeeb), cov khoom sib hloov yuav tsum tau kuaj xyuas. Qhov kev xeem feem ntau muaj xws li:

Pressurizing lub raj sab nrog nitrogen mus rau qhov ntsuas siab (piv txwv li, 1.1 × kev khiav hauj lwm siab).

Submerging the tube bundle (or using a soap solution) to detect bubbles, or using a mass spectrometer helium leak test for high‑sensitivity detection.

Kuaj lub plhaub sab zoo ib yam tom qab kev teeb tsa.

Khoom siv traceability:Tag nrho PTFE Cheebtsam (tube, raj ntawv, gaskets) yuav tsum tau ntawv pov thawj raws li PTFE nkauj xwb uas tsis muaj fillers los yog regrind, vim hais tias tej impurity yuav ua tau ib tug tsis ua hauj lwm taw tes nyob rau hauv lub xub ntiag ntawm reactive halogens.

Kev saib xyuas kev ua haujlwm:Cov dej txias qhov hluav taws xob feem ntau saib xyuas pH lossis conductivity. Tam sim ntawd poob rau hauv pH los yog nce nyob rau hauv conductivity qhia tau hais tias ib tug ua txhaum ntawm PTFE raj phab ntsa, tso cai rau acidic pa nkag mus rau hauv lub txias voj voog. Thaum kuaj pom, lub cuab yeej tau txais kev cuam tshuam los nres kev ua haujlwm thiab tshem tawm cov kab tso pa tawm.

Cov txiaj ntsig hauv qab: Tiv thaiv lub tshuab nqus tsev twj thiab Scrubbers

PTFE exchanger yog ib qho tseem ceeb, muaj zog, thiab txhim khu kev qha tiv thaiv lub tshuab nqus tsev twj tso kua mis thiab ib puag ncig. Yog tsis muaj cua txias, cov pa kub nkag mus rau hauv lub tshuab ntxhua khaub ncaws tuaj yeem ua rau:

Thermal puas rau scrubber internals:Ntau cov ntaub ntub dej siv cov khoom siv polypropylene lossis PVC uas soften saum 60 degree.

Txo kev txhuam kom zoo:Halogen gases yog soluble ntau dua hauv dej txias. Txias cov pa tawm mus rau 30-40℃nce qhov kev tshem tawm ntawm HCl, Cl₂, thiab HF.

Pump tsis ua haujlwm:Lub tshuab nqus tsev qhuav siv hauv cov khoom siv hluav taws xob semiconductor (piv txwv li, cov twj tso kua mis, cov twj tso kua mis) muaj cov kev tshem tawm sab hauv. Kub, reactive gases yuav ua rau corrosion thiab deposit tsim nyob rau hauv lub twj tso kua mis, ua rau qaug dab peg los yog paug ntawm lub twj tso kua mis roj.

Los ntawm kev tso cua txias rau qhov kub thiab txias (feem ntau qis dua 50 degree), PTFE exchanger xyuas kom meej tias cov twj tso kua mis qis qis thiab lub tshuab nqus tsev ua haujlwm nyob rau hauv lawv cov kev txwv tsim, txo cov zaus txij nkawm thiab tiv thaiv tsis tau teem sijhawm.

Xaus: Lub Indispensable Chemically Immune Workhorse

PTFE heat exchanger yog qhov tseem ceeb, cov tshuaj tiv thaiv kab mob ua haujlwm uas ua rau muaj kev txhoj puab heev, ntau lub halogen tso pa tawm ntawm cov cuab yeej plasma etch. Nws ua hauj lwm nyob rau hauv ib qho ntawm cov chemically nyuaj kwj nyob rau hauv tag nrho cov semiconductor fabrication facility, txias kub, corrosive gases laden nrog khoom particulates thiab nplaum residues, tag nrho cov thaum tiv thaiv tawm tsam los ntawm fluorine, chlorine, bromine, thiab lawv byproducts. Kev tsim qauv ntsug, PTFE tube siv, thiab cov txheej txheem kev soj ntsuam nruj nruj kom ntseeg tau tias kev ua haujlwm ruaj ntseg. Kev tsim cov chips siab tshaj plaws - tsim cov processors, nco chips, thiab cov khoom siv fais fab- yog kev tiv thaiv los ntawm cov khoom siv tshuaj tsis zoo tshaj plaws. Lub PTFE exchanger tsis yog ib feem; Nws yog ib qho tseem ceeb ntawm kev nyab xeeb thiab ib puag ncig tus neeg saib xyuas, ua kom cov ntshav etching thaum ua kom cov fab huv si, nyab xeeb, thiab tsim khoom.