Yog vim li cas rau kev soj ntsuam los ntawm cov txheej txheem ntim

LED tuag teeb tshwm sim, cov neeg siv khoom xws li cov tuam txhab ntim khoom, cov khoom lag luam hauv qab mus rau chav nyob thiab cov neeg siv hauv kev siv yuav ntsib nws. Yog vim li cas yog tias muaj ob hom xwm txheej: Ua ntej, qhov xau tam sim no ntawm LED loj dhau los ua PN knot poob, yog li ntawd cov teeb ci LED tsis ci, thiab hom teeb meem feem ntau tsis cuam tshuam rau kev ua haujlwm ntawm lwm yam LED teeb; thib ob, LED, LED, LED Lub sab hauv kev sib txuas tus thawj coj ntawm lub teeb yog tawg los ua lub teeb tuag rau lub LED yam tsis muaj tam sim no dhau. Hom xwm txheej yuav cuam tshuam rau kev ua haujlwm dav dav ntawm lwm lub teeb LED. V —2.2V, xiav-ntsuab thiab dawb LED ua haujlwm voltage 2.8 —3.2V), feem ntau txuas nrog txoj hlua thiab sib txuas ua haujlwm sib txawv. Qhov ntau LED teeb txuas nrog, qhov cuam tshuam ntau dua. Lub zero-string LED lub teeb tsis ci, nws tuaj yeem pom tias qhov xwm txheej no hnyav dua li thawj hom xwm txheej. LED tuag teeb yog Guan Jian, uas cuam tshuam rau cov zis ntau thiab kev ntseeg tau. Yuav ua li cas txo thiab tshem tawm cov roj teeb tuag thiab ua kom cov zis ntim thiab kev ntseeg tau yog qhov teeb meem tseem ceeb uas yuav tsum tau ua los ntawm kev sib khi thiab siv cov lag luam. Cia peb ua qee qhov kev soj ntsuam thiab kev sib tham txog kev tsim cov teeb tuag. 1. Electrostatic kev puas tsuaj rau LED nti yog puas ua rau lub PN knot ntawm lub LED nti ploj, cov xau tam sim no raug tshem tawm, thiab nws dhau los ua ib hom kev tiv thaiv. Tsis tas li ntawd xwb. Kaum tawm lab nyiaj daus las ntawm kev lag luam poob. Yog li ntawd, cov khoom siv hluav taws xob ntawm cov khoom siv hluav taws xob tiv thaiv hluav taws xob yog ib txoj haujlwm tseem ceeb hauv kev lag luam hluav taws xob. Tsis txhob coj nws maj mam rau LED ntim thiab LED zaub tuam txhab. Yog tias muaj teeb meem nyob rau hauv ib qho kev sib txuas, nws yuav ua rau kev puas tsuaj rau LED, uas yuav ua rau LED kev ua haujlwm tsis zoo. Peb paub tias tib neeg lub cev (ESD) tuaj yeem ncav cuag peb txhiab volt sab laug sab laug, thiab ko taw tuaj yeem ua rau cov nti LED tawg los ntawm kev puas tsuaj. Nws yog ntim cov kab ntau lawm hauv LED. Seb qhov av tsis kam ntawm ntau yam khoom siv tuaj yeem ua tau raws li qhov yuav tsum tau ua. Tsis tas li ntawd xwb. Tsis tas li ntawd xwb, yuav tsum ceev faj li 4 ohms. Qhov kev puas tsuaj rau LED ntawm tib neeg lub cev kuj loj heev. Thaum ua haujlwm, hnav khaub ncaws tiv thaiv zoo li qub, nrog lub nplhaib hluav taws xob zoo li qub, lub nplhaib hluav taws xob zoo li qub yog qhov tsis zoo, thiab tsis muaj kev cuam tshuam zoo rau cov electrostatic ncig ntawm lub nplhaib electrostatic. Yog tias koj tsis siv cov khoom lag luam no, yog tias cov neeg ua haujlwm ua txhaum cov txheej txheem ua haujlwm, lawv yuav tsum tau txais kev ceeb toom ntau, thiab tib lub sijhawm, nws kuj txhawb kev siv lwm tus. Ntau npaum li cas tib neeg lub cev muaj hluav taws xob zoo li qub, cov khaub ncaws sib txawv ntawm cov neeg hnav, thiab qhov ntim ntawm txhua tus neeg, thaum lub caij nplooj zeeg thiab lub caij ntuj no, peb nyuaj rau pom qhov paug ntawm cov khaub ncaws. Qhov no. Tus nqi ESD ntawm silicon-based chip tsuas yog 1100 volts, thiab ESD tus nqi ntawm sapphire puag nti yog qis dua, tsuav yog 500 —600 volt. Ib lub nti zoo lossis LED, yog tias peb coj nws nrog peb txhais tes (lub cev tsis siv kev tiv thaiv), cov txiaj ntsig tuaj yeem xav txog tias cov nti lossis LED yuav puas tsuaj rau qhov sib txawv. Ob txhais tes zoo kawg nkaus uas yog qhov zoo heev uas yog qhov hluav taws xob zoo li qub. Yog tias lub tuam txhab ntim khoom tsis ua haujlwm nruj me ntsis raws li cov cai hauv av, nws yog lub tuam txhab nws tus kheej uas yuav txo qis kev tsim nyog ntawm cov khoom thiab txo cov kev lag luam kev lag luam. Yog tias cov cuab yeej siv thiab cov neeg ua haujlwm uas siv LEDs tsis yog hauv av Nws yog qhov kev zam. Raws li qhov yuav tsum tau ua ntawm LED tus qauv phau ntawv qhia, LED qhov kev ncua deb colloid tsis tsawg dua 3 —Lawv nrhiav li 5 mm, lossis tej pab coob tsis ua li ntawd, tiamsis tsuas muaj phau PCB (≤2 mm) Tsis tas li ntawd xwb, tej uas yuav ua rau tej LED tswj. Vim tias qhov kub ntawm vuam ntau dhau yuav cuam tshuam rau cov nti, nws yuav degenerate cov yam ntxwv ntawm cov nti thiab txo cov teeb pom kev zoo, yog li qhov tshwm sim tsis tshua muaj tshwm sim. Tsis muaj kev lag luam me siv phau ntawv welding, siv 40 wattipaton soldering hlau, vuam kub tsis tuaj yeem tswj tau, thiab cov hlau soldering kub yog 300 —Tshaj li 400 C, qhov kub thiab txias heev kuj tseem yuav ua rau lub teeb tuag. LED txhuas yog ob peb zaug siab dua qhov o coefficient ntawm 150 C ntawm qhov kub thiab txias. Txias shrinking lub vuam taw tes qhib, tsim ib tug tuag teeb phenomenon. 2. Yog vim li cas rau qhov tshwm sim ntawm qhov tshwm sim ntawm lub teeb nyob rau hauv lub internal kev twb kev txuas welding ntawm LeD teeb. 2.1 Kev soj ntsuam ntawm qhov tshwm sim ntawm cov teeb tuag 2.1 Cov txheej txheem tsim khoom ntawm lub tuam txhab ntim khoom tsis tiav, thiab cov txheej txheem tshuaj xyuas yog rov qab. Cov kab kaw yog ua los ntawm tooj liab lossis hlau hlau cov ntaub ntawv los ntawm precision pwm. Vim cov khoom siv tooj liab kim dua, tus nqi yog ib txwm siab. Vim yog kev lag luam hnyav, cov yam ntxwv cuam tshuam. Lawv nrhiav tau lub LED. Cov hlau kaw ntawm cov hlau yuav tsum yog nyiaj-plated. Cov nyiaj plating tsis muaj ob qhov teebmeem. Ib qho yog los tiv thaiv moxibustion thiab xeb. Lwm qhov yog kom yooj yim vuam. Nws muaj feem xyuam rau lub neej ntawm LED. Ua ntej electroplating, kev ua haujlwm yuav tsum tau ua nruj me ntsis raws li cov cai, thiab cov txheej txheem ntawm kev tshem tawm, tshem tawm roj, thiab phosphorusization yuav tsum ua kom tiav. , Cov txheej yog tuab heev thiab tus nqi siab heev, nyias nyias los cuam tshuam rau tus nqi. Vim hais tias cov tuam txhab ntim khoom lag luam zoo tib yam LED tsis muaj peev xwm txheeb xyuas qhov nyiaj ntawm cov hluav taws xob plating, nws muab qee cov lag luam electroplating tsis muaj qhov khoob kom txo tau cov nyiaj-plated txheej ntawm cov electroplating, txo cov nyiaj tau los. Txoj kev kuaj tsis muaj, thiab tsis muaj qhov ntsuas nrog lub thickness thiab ceev ntawm straton plating txheej. Kuv tau pom tias kuv tau pom ob peb lub hlis hauv lub tsev khaws khoom thiab xeb tom qab ob peb lub hlis. Cov khoom tsim nrog xws li kaw kab yog twv yuav raug hu tsis ntev, tsis txhob hais 3 —50,000 teev, 10,000 teev yog qhov teeb meem. Qhov laj thawj yog yooj yim heev txhua txhua xyoo tsis muaj lub sijhawm. Cov huab cua thiab cov av noo ntawm huab cua yog siab, thiab nws yog ib qho nyuaj rau tsim ib qho txawv electroplating hlau qhov chaw. Txawm tias lub encapsulated LED yuav nyias dhau lawm thiab cov nyiaj-plated txheej yog nyias dhau lawm, thiab cov vuam pob qij txha yuav raug muab tshem tawm los ua qhov tshwm sim ntawm lub teeb tuag. Ntawd yog, lub teeb peb tau ntsib tsis tau qhib, tab sis qhov tseeb, cov pob qij txha sab hauv raug tshem tawm ntawm lub txee. 2.2 Txhua txheej txheem sab nraud ntawm cov txheej txheem ntim khoom yuav tsum tau ua raws li qhov tsis zoo. Yog vim li cas rau qhov tsis saib xyuas ntawm ib qho txuas yog tsim lub teeb tuag. Cov kua nplaum yuav rov qab mus rau lub chip kub ncoo los ua ib qho luv luv, thiab cov nti yuav tsis nplaum. Ib yam yog qhov tseeb ntawm dual welded nti taw tes rwb thaiv tsev cov pos hniav. Yog tias koj xaj ntau cov kua nplaum insulating, koj yuav rov qab mus rau lub ncoo kub ntawm cov nti los tsim cov txiv hmab txiv ntoo virtual thaum lub sij hawm vuam. Muaj cov chips tsawg dua thiab tsis tuaj yeem ruaj khov, yog li cov kav dej yuav tsum yog txoj cai. Cov txheej txheem vuam kuj tseem ceeb heev. Kev sib koom ua ke ntawm lub siab, lub sijhawm, qhov kub thiab txias, thiab lub zog ntawm lub tshuab kub hlau vuam yuav tsum yog txoj cai. Tsuas yog lub sijhawm kho, lwm qhov peb tsis tuaj yeem kho tau. Dacong nyuaj rau crush lub nti, me me heev, nws nyuaj rau welding. Qhov kub ntawm qhov vuam feem ntau yog 280 C. Lub zog txias yog hais txog lub zog ultrasonic. Tsis tas li ntawd xwb. Lawv nrhiav kev nyuaj siab. Txhua xyoo, qhov tsis sib xws ntawm lub pob kub vuam tshuab raug kuaj pom thiab tiv thaiv kom ntseeg tau tias cov vuam tsis zoo nyob rau hauv daim ntawv zoo tshaj plaws. Tsis tas li ntawd, lub arc ntawm txoj kab vuam tsis tas yuav tsum tau. Lub arc qhov siab ntawm ib qho vuam taw tes nti yog 1.5-2 nti tuab, thiab qhov siab arc ntawm ob lub vuam sib txuas nti yog 2-3 daim tuab. Lub arc qhov siab yog tsawg dhau los ua lub teeb tuag thaum vuam. 3. Cov txheej txheem ntawm kev txheeb xyuas lub tshuab hluav taws xob tuag lub teeb yuav ua kom sov lub teeb tsis muaj teeb pom kev zoo nrog lub teeb ci kom sov lub LED coj mus rau 200-300 C, tshem tawm lub teeb, thiab txuas lub LED nrog 3 volt roj teeb thiab qhov tsis zoo electrode. Lub teeb, tab sis lub teeb LED raug txo los ntawm lub teeb kom tsis txhob nyob nrog qhov kub thiab txias, tom qab ntawd nws ua pov thawj tias LED lub teeb yog vuam virtual. Yog vim li cas rau cov cua sov tuaj yeem teeb pom kev yog siv cov hlau thermal contraction thiab contraction. Tus thawj coj LED tau nthuav dav thiab txuas ntxiv mus rau cov pob qij txha sab hauv thaum cua sov. Kev kos duab cog lus rau daim ntawv ntsuas kub ib txwm, disconnect qhov taw tes sab hauv, lub teeb LED tsis teeb, hom kev rov sim dua yog sab ntsuj plig. Vuam ob-welded teeb ntawm hom kev vuam virtual yog nyob rau ntawm cov hlau sawb, tsau nrog cov kua qaub sulfuric acid kom yaj lub LED sab nraud colloid, thiab cov colloid yog yaj thiab tshem tawm. Koj tuaj yeem pom qhov teeb meem ntawm seb nws yog thawj vuam lossis ob - vuam. Yog qhov parameter ntawm kub silk pob welding tshuab tsis raug, lossis lwm yam laj thawj los txhim kho cov txheej txheem thiab txheej txheem. Cov neeg siv cov khoom siv LED kuj yuav ntsib qhov tshwm sim ntawm cov teeb tuag, uas yog, tom qab cov khoom siv LED siv rau lub sijhawm, qhov tshwm sim ntawm lub teeb tuag tshwm sim. Tsis muaj ob qho laj thawj rau lub teeb tuag. Tsis muaj teeb meem nrog tus nqi ntawm electroplating, thiab cov xau tam sim no ntawm LED nti kuj tseem tsim lub teeb ci LED yuav tsis teeb. Tam sim no hais tias ntau cov khoom siv LED raug tiv thaiv los ntawm tsis ntxiv kev tiv thaiv hluav taws xob tiv thaiv kom txo tau cov nqi, yog li nws yog qhov nyuaj rau kev nkag siab zoo li cov chips puas. Nws yog ib qho nyuaj rau kev qhia cov khoom siv hluav taws xob hauv cov hnub los nag raws li cov hluav taws xob hluav taws xob hluav taws xob siab, thiab lub siab pulse ntawm cov khoom siv hluav taws xob sib txuas, uas yuav ua rau cov khoom siv hluav taws xob puas tsuaj mus rau qhov sib txawv. Tsis muaj ntau qhov laj thawj rau lub teeb tuag. Nws tsis tuaj yeem sau ib qho los ntawm ib qho. Los ntawm kev ntim khoom, kev siv, thiab kev siv ntau yam kev sib txuas, nws tsis tuaj yeem pom cov teeb tuag. Yuav ua li cas nce cov khoom ntawm LED yog tias lub tuam txhab demolition thiab kev siv lub lag luam yuav tsum tau pom zoo heev. Thiab qhov teeb meem ntawm kev tshawb fawb kev tshawb fawb, los ntawm chips thiab khib xaiv, mus rau LED ntim xoom txheej txheem txheej txheem, raws li ISO2000 qhov system kom muaj nuj nqis. Ntev npaum li qhov tso zis ntawm LED tuaj yeem ua tiav ntau dua, nws tuaj yeem ua lub neej ntev, siab thiab txhim khu kev qha. Nyob rau hauv cov nqe lus ntawm circuits uas siv, xaiv voltage -sensitive kuj thiab PPTC Cheebtsam los txhim kho cov kev tiv thaiv Circuit Court, ntxiv rau parallel tus naj npawb ntawm parallel txoj kev, thiab siv cov tam sim no switching tam sim no. Kev tiv thaiv kub hnyiab yog qhov ntsuas tsis raug los txhim kho kev ntseeg tau ntawm cov khoom siv LED.