LED chips yog lub plawv ntawm LED khoom. Lub luag haujlwm tseem ceeb yog hloov hluav taws xob rau hauv lub teeb lub zog. Nyob rau hauv tus txheej txheem ntawm kev siv, LED zaub chips kuj yuav muaj ntau yam teeb meem. Tam sim no cia peb saib cov xwm txheej tshwm sim ntawm LED chips. Rau nqe lus nug!
01. Forward voltage txo, tsaus teeb
(1) Ib qho yog tias cov khoom siv hluav taws xob thiab cov khoom siv luminescent yog nyob rau hauv ohmic kev sib cuag, tab sis kev tiv thaiv kev tiv thaiv yog qhov loj, uas feem ntau tshwm sim los ntawm qhov tsis tshua muaj siab ntawm cov khoom siv substrate lossis cov khoom siv hluav taws xob tsis zoo.
(2) Ib qho yog tias cov khoom siv hluav taws xob thiab cov khoom siv nyob rau hauv kev sib cuag tsis yog ohmic, uas feem ntau tshwm sim thaum cov txheej txheem ntawm evaporating thawj txheej ntawm electrode nyob rau hauv cov txheej txheem chip electrode.
Tsis tas li ntawd, qhov hluav taws xob rau pem hauv ntej kuj tseem yuav raug txo thaum lub sij hawm ntim khoom. Cov laj thawj tseem ceeb yog tias cov kua nplaum nyiaj tsis kho tag nrho, thiab cov bracket lossis chip electrodes yog stained, uas ua rau muaj kev tiv thaiv siab lossis kev tiv thaiv tsis ruaj khov.
Thaum lub nti nrog txo qis rau pem hauv ntej yog kuaj ntawm qhov ntsuas hluav taws xob ruaj khov, qhov tam sim no dhau los ntawm cov nti me me, yog li qhia qhov tsaus me ntsis. Kuj tseem muaj qhov tshwm sim tsaus nti uas lub nti nws tus kheej muaj qhov ua haujlwm qis luminous thiab ib txwm muaj zog rau pem hauv ntej poob.
02. Nyuaj siab vuam
(1) Tsis-stick: feem ntau yog vim cov electrode nto yog oxidized los yog glued
(2) Kev sib cuag nrog cov khoom siv luminescent tsis muaj zog thiab cov txheej tuab ntawm cov hlau tsis muaj zog, cov txheej txheej thickened ntog.
(3) Piercing electrodes: feem ntau muaj feem xyuam nrog cov ntaub ntawv nti, cov khoom siv nrog cov khoom siv nkig thiab tsis muaj zog yog yooj yim rau nkag mus rau electrodes. Feem ntau, GAALAS cov ntaub ntawv (xws li cov liab siab, cov chips infrared) yooj yim rau nkag mus rau electrodes dua li GAP cov ntaub ntawv.
(4) Siab vuam debugging yuav tsum tau kho los ntawm vuam kub, ultrasonic zog, ultrasonic lub sij hawm, siab, kub pob loj, bracket positioning, thiab lwm yam.
03. Qhov sib txawv ntawm cov xim luminous
(1) Qhov sib txawv pom tseeb hauv cov xim luminous ntawm tib lub nti yog vim qhov teeb meem ntawm cov khoom siv epitaxial wafer. ALGAINP cov khoom siv plaub-txheej txheem siv cov qauv quantum nyias nyias, thiab nws yog ib qho nyuaj los xyuas kom meej tias cov khoom ntawm txhua cheeb tsam zoo ib yam thaum loj hlob. (Cov khoom sib xyaw txiav txim siab qhov sib txawv ntawm qhov sib txawv, thiab qhov sib txawv band txiav txim siab lub wavelength).
(2) Rau GAP daj-ntsuab chips, lub teeb-emitting wavelength yuav tsis txawv heev, tab sis vim hais tias tib neeg lub qhov muag yog rhiab heev rau cov xim ntawm cov band no, nws yog ib qho yooj yim mus ntes yellowish thiab greenish. Txij li thaum lub wavelength yog txiav txim los ntawm cov khoom siv epitaxial wafer, qhov chaw me me, lub tswv yim me me ntawm cov xim sib txawv, yog li muaj ib qho kev xaiv nyob sib ze hauv M / T ua haujlwm.
(3) Qee lub teeb-emitting xim ntawm GAP liab nti yog txiv kab ntxwv-daj, uas yog vim tsis ncaj qha mus rau hauv nws lub teeb-emitting mechanism. Kev cuam tshuam los ntawm impurity concentration, thaum qhov ceev tam sim no nce, impurity zog theem hloov thiab luminescence saturation yooj yim tshwm sim, thiab luminescence pib tig txiv kab ntxwv-daj.
04. Thyristor nyhuv
(1) Lub teeb-emitting diode tsis tuaj yeem tig rau hauv qhov qub voltage. Thaum qhov voltage nce mus rau ib qho twg, tam sim no yuav hloov sai sai.
(2) Yog vim li cas rau qhov tshwm sim thyristor yog tias muaj qhov rov qab interlayer thaum lub epitaxial wafer ntawm cov khoom luminescent loj hlob. Lub LED nrog qhov tshwm sim no tau zais rau pem hauv ntej voltage poob thaum kuaj ntawm IF=20MA. Thaum siv cov txheej txheem, qhov voltage ntawm ob tug ncej tsis txaus. Yog tias nws loj, nws tsis pom qhov kaj. Koj tuaj yeem siv cov ntaub ntawv ntsuas ntsuas los ntsuas qhov nkhaus ntawm daim ntawv qhia transistor, lossis koj tuaj yeem pom los ntawm kev poob qis rau pem hauv ntej hauv qab me me tam sim no IF=10UA. Lub pem hauv ntej voltage poob nyob rau hauv me me tam sim no yog obviously loj heev. yog tshwm sim los ntawm qhov teeb meem no.
05. Rov qab xau tam sim no IR
Nyob rau hauv cov xwm txheej tsis tshua muaj, qhov rov qab xau tam sim no yog cov yam ntxwv ntawm lub diode. Raws li cov kev cai yav dhau los ntawm LED, nws hais txog qhov rov qab xau tam sim no thaum qhov rov qab voltage yog 5V. Nrog rau kev txhim kho cov kev ua tau zoo ntawm lub teeb-emitting diodes, qhov rov qab xau tam sim no yuav ua me me thiab me. Qhov me me ntawm IR, qhov zoo dua, thiab qhov ua rau yog qhov tsis sib xws ntawm cov khoom siv hluav taws xob.
(1) Yog vim li cas rau qhov teeb meem zoo ntawm lub nti nws tus kheej yuav tshwm sim los ntawm kev txawv txav ntawm lub nti nws tus kheej.
(2) Cov kua nplaum nyiaj ntau dhau yuav ua rau luv luv hauv cov xwm txheej hnyav. Qhov thim rov qab los ntawm epitaxy feem ntau yog tshwm sim los ntawm cov txheej txheem sab hauv ntawm PN kev sib tshuam. Thaum lub sij hawm tsim cov txheej txheem nti, sab corrosion tsis txaus los yog muaj cov kua nplaum nyiaj txuas rau qhov ntsuas qhov chaw. Nws yog txwv tsis pub siv cov tshuaj organic los npaj cov kua nplaum nyiaj. Txhawm rau tiv thaiv cov kua nplaum nyiaj los ntawm kev nce mus rau qhov chaw sib tshuam los ntawm qhov tshwm sim ntawm capillary.
(3) Static puas. Rau cov khoom siv epitaxial, chip fabrication, ntim khoom, thiab kev sim, qhov rov qab xau tam sim no feem ntau yog 10UA hauv qab 5V, thiab qhov hluav taws xob thim rov qab tuaj yeem kuaj tau raws li qhov ntsuas rov qab tam sim no. Cov yam ntxwv rov qab ntawm ntau hom LEDs yog qhov sib txawv heev: qhov rov qab tawg ntawm cov xim ntsuab thiab cov daj daj tuaj yeem ncav cuag ntau tshaj li ib puas volts, thaum cov chips liab feem ntau nyob nruab nrab ntawm kaum thiab nees nkaum volts.
(4) Kev tswj tsis raug ntawm kev sib txuas ntawm cov hlau nplaum, ua rau cov nti tawg thiab nce IR.
daws
(1) Qhov nyiaj ntawm cov kua nplaum yuav tsum tau tswj ntawm 1/3 mus rau 1/2 ntawm qhov siab ntawm wafer;
(2) Cov hluav taws xob zoo li qub ntawm tib neeg lub cev thiab lub tshuab yuav tsum tau tswj qis dua 50V;
(3) Lub siab ntawm thawj taw tes ntawm vuam hlau yuav tsum tau tswj ntawm 30 thiab 45g.
06. Teeb meem tuag
(1) Cov dej xau tam sim no ntawm LED loj dhau, ua rau PN kev sib tshuam tsis ua haujlwm, kom lub teeb ci LED tsis teeb. Qhov xwm txheej no feem ntau tsis cuam tshuam rau kev ua haujlwm ntawm lwm lub teeb LED.
(2) Cov kev sib txuas sab hauv ntawm lub teeb ci LED raug txiav, ua rau LED tsis muaj tam sim no dhau los thiab ua rau lub teeb tuag. Qhov xwm txheej no yuav cuam tshuam rau kev ua haujlwm li qub ntawm lwm lub teeb LED. 1.8v-2.2v, xiav-ntsuab-dawb LED ua haujlwm voltage 2.8-3.2v), feem ntau txuas nrog hauv series thiab sib npaug kom hloov mus rau qhov sib txawv ua haujlwm voltages, ntau lub teeb LED hauv series, kev cuam tshuam ntau dua. Tsuav yog ib qho ntawm cov teeb ci LED muaj qhov qhib Circuit Court, tag nrho cov hlua ntawm LED teeb nyob rau hauv series Circuit Court yuav tsis teeb. Nws tuaj yeem pom tias qhov xwm txheej no hnyav dua li thawj qhov xwm txheej.
