Hauv cov txheej txheem sib dhos ntawm PCB, daim ntawv so stencil yog cov khoom siv huv uas siv ntau zaus ntawm chaw luam ntawv, tab sis nws kuj yog ib qho tseem ceeb uas cuam tshuam rau cov txiaj ntsig uas feem ntau tsis quav ntsej. Daim ntawv so ib txheej pheej yig muaj nyob rau hauv kev ua lag luam tsis muaj zog txaus ntawm cov fiber; thaum dipped hauv IPA cov tshuaj ntxuav kom so cov khoom seem ntawm cov tshuaj solder los ntawm sab hauv qab ntawm stencil, nws yooj yim heev rau kev poob cov khoom me me fiber. Cov fibers zoo heev no tuaj yeem nyob hauv qhov apertures ntawm cov stencils zoo-suab, ua rau muaj qhov apertures thaiv tom qab kev tsim khoom ntev. Qhov no ua rau muaj qhov tsis zoo xws li tsis txaus solder, bridging thiab solder pob. Kev nres ntau zaus rau kev ntxuav stencil txo qhov kev ua haujlwm tag nrho ntawm cov kab thiab ua rau lub tuam txhab cov nqi rau cov khoom siv thiab cov neeg ua haujlwm nce.
Kev daws qhov teeb meem thoob plaws kev lag luam ntawm kev tshem tawm cov fiber thiab stencil blockages, peb cov ntawv so spunlace stencil tshwj xeeb muaj cov qauv substrate zoo tshaj plaws, muab ntau yam txiaj ntsig zoo:
Ib txheej ob txheej spunlace composite, molded ua ib daim tsis muaj nplaum ntau dhau;
Tsis muaj hmoov av thiab tsis muaj plaub, nrog rau kev poob fiber tsawg kawg nkaus thaum lub sijhawm so;
Ib qho qauv porous muab kev nqus dej muaj zog thiab muaj peev xwm ntes cov kuab paug, ua kom zoo adsorbing solder paste thiab flux residues;
Muaj ntau qhov dav, nrog rau qhov loj me ntawm cov tub ntxhais uas tuaj yeem hloov kho kom haum rau cov tshuab luam ntawv tsis siv neeg xws li DEK thiab MPM;
Kev sib raug zoo ntawm cov tshuaj lom neeg zoo heev; tsis ua rau cov khoom tsis huv puas tsuaj txawm tias thaum sib cuag ntev nrog IPA thiab ntau yam tshuaj ntxuav.
Cov hmoov av tsawg thiab cov khoom tsis muaj lint yog cov yam ntxwv tseem ceeb uas sib txawv ntawm cov ntawv so SMT zoo thiab cov khoom ib txwm muaj. Cov khoom siv filament polyester ua ke nrog cov txheej txheem spunlace entanglement siv cov ntoo pulp tshiab, tsis siv cov tshuaj nplaum, ua kom cov fibers tseem khi nruj hauv ob qho tib si qhuav thiab ntub dej. Thaum so stencils, tsis muaj lint lossis cov khib nyiab tsim tawm; cov tin residues zoo thiab cov hmoov flux raug ntes hauv daim ntawv sab hauv pores, tiv thaiv cov khib nyiab kom tsis txhob nyob hauv cov stencil apertures lossis dispersing thoob plaws hauv chav huv. Haum rau Class 1,000 thiab Class 10,000 chav huv SMT kab ntau lawm, nws txo cov qhov tsis zoo ntawm qhov chaw los ntawm stencil blockages vim yog cov khib nyiab ntawv, txo qhov zaus ntawm downtime rau kev ntxuav, thiab tswj cov nqi tsim khoom.
Daim ntawv so plua plav no siv dav hauv cov kab ntau lawm rau cov khoom siv hluav taws xob, cov laug cam hluav taws xob tshiab thiab kev tso cov chips kom raug. Nws haum rau kev so tes ib nrab tsis siv neeg thiab kev so tas mus li ntawm cov tshuab luam ntawv tsis siv neeg. Cov kev daws teeb meem tshwj xeeb hauv ntau qhov ntau thiab tsawg tuaj yeem kho kom haum rau lub tuam txhab cov khoom siv uas twb muaj lawm, tshem tawm qhov xav tau hloov cov qauv tshuab, cov khoom siv lossis cov khoom siv ntxiv; cov khoom siv uas tiv taus cov kuab tshuaj yog cov khoom tsis yooj yim rhuav, muab lub zog ntxuav zoo dua nrog txhua qhov so thiab txo qhov zaus ntawm kev hloov khoom siv rau lub sijhawm ntev.
Rau cov chaw tsim khoom SMT, daim ntawv so stencil uas zoo li tsis muaj dab tsi tshwj xeeb muaj qhov cuam tshuam ncaj qha rau qhov tso tawm. Kev xaiv cov ntawv so ob txheej spunlace uas muaj hmoov av tsawg, nqus tau zoo tuaj yeem txo qhov teeb meem ntawm qhov txhaws ntawm stencil, yog li txhawb nqa kev tswj hwm kev huv hauv lub Hoobkas.
Lub sijhawm tshaj tawm: Lub Xya Hli-20-2026