Yuav ua li cas los xyuas kom meej lub neej ntev thiab kev cia siab ntawm diodes siv nyob rau hauv kev kho mob cov cuab yeej?

1, Khoom thiab txheej txheem innovation: tso lub hauv paus rau kev ntseeg tau
Lub neej ntev thiab kev ntseeg siab ntawm diodes thawj zaug nyob ntawm kev xaiv cov khoom siv thiab cov txheej txheem tsim khoom. Txawm hais tias ib txwm silicon-raws li diodes muaj cov nqi qis dua, lawv muaj feem cuam tshuam rau kev ua haujlwm tsis zoo hauv qhov kub thiab txias ib puag ncig. Nyob rau hauv xyoo tas los no, dav bandgap semiconductor cov ntaub ntawv xws li silicon carbide (SiC) thiab gallium nitride (GaN) tau maj mam dhau los ua qhov kev xaiv zoo tshaj plaws rau cov khoom siv kho mob diodes vim lawv cov thermal conductivity, siab tawg voltage, thiab tsis tshua muaj thim rov qab cov yam ntxwv tam sim no. Piv txwv li, hauv X-ray detector ntawm CT imaging cov cuab yeej, SiC photodiodes tuaj yeem ua haujlwm ruaj khov ntawm qhov kub ntawm 125 degree, nrog rau qhov kev ua haujlwm ntawm quantum decay tus nqi txo los ntawm 60% piv rau silicon-cov khoom siv raws li, thiab lub neej ntev ntev mus txog 100000 teev.

Lub precision ntawm manufacturing txheej txheem yog qhov tseem ceeb sib npaug. Siv Shenzhen Shihuagao Semiconductor Co., Ltd. ua piv txwv, nws qib kev kho mob photodiodes siv atomic txheej deposition (ALD) thev naus laus zis los tsim cov txheej txheem nano qib passivation ntawm cov nti saum npoo, zoo cais dej vapor thiab ion kuab paug, ua kom lub cuab yeej tswj kev ua haujlwm ruaj khov txawm tias nyob hauv 85% av noo ib puag ncig. Tsis tas li ntawd, cov tshuab ntim kev ntxhov siab tsawg (xws li ceramic co firing ntim) tuaj yeem txo qhov kev pheej hmoo ntawm tus pin breakage los ntawm thermal expansion coefficient mismatch, ntxiv kev txhim kho txhua yam kev ntseeg tau.

2, Kev soj ntsuam nruj nruj: tshuaj xyuas cov cuab yeej muaj kev ntseeg siab
Cov kev xav tau ntawm kev ntseeg siab rau diodes hauv cov khoom siv kho mob muaj ntau dua li cov neeg siv khoom siv hluav taws xob, thiab lawv thaj tsam kev ua haujlwm yuav tsum raug txheeb xyuas los ntawm kev sim ntau yam. Cov txheej txheem kuaj ib txwm muaj xws li:

Accelerated Life Test (ALT): Ua 2000 teev kev laus ntawm lub cuab yeej nyob rau hauv qhov kub thiab txias (125 degree) thiab siab rov qab voltage (ob npaug ntawm tus nqi ntsuas) cov xwm txheej, simulating 10- xyoo kev siv tiag tiag scenario. Ntsuas cov cuab yeej siv lub neej kev faib tawm los ntawm qhov tsis xws li quantum efficiency decay rate thiab kev loj hlob tam sim no tsaus. Piv txwv li, ib qho qauv ntawm APD (avalanche photodiode) qhia tom qab ALT tias 95% ntawm cov khoom siv muaj lub neej ntev tshaj li 15 xyoo, ua tau raws li qhov xav tau kev siv mus sij hawm ntev ntawm cov khoom siv kho mob.
Kev ntsuas kub ntawm kev caij tsheb kauj vab: Ua 1000 lub voj voog nyob rau hauv thaj tsam ntawm -40℃txog 85℃txhawm rau kuaj lub zog qaug zog ntawm cov cuab yeej nyob rau hauv qhov kub hloov pauv. Lub TO-18 ntim cov diode feem ntau siv hauv cov khoom siv kho mob tuaj yeem txo qhov thermal cycling tsis ua haujlwm ntawm 0.5% mus rau 0.02% los ntawm kev ua kom zoo dua cov txheej txheem ntawm cov pins thiab chips.
Electromagnetic compatibility (EMC) testing: Muaj ntau qhov kev cuam tshuam ntawm electromagnetic cuam tshuam nyob rau hauv ib puag ncig kev kho mob, xws li cov hlau nplaum muaj zog los ntawm cov cuab yeej MRI thiab siab - lub suab nrov ntawm cov riam hluav taws xob. Lub diode yuav tsum dhau IEC 60601-1-2 tus qauv xeem kom paub meej tias nws muaj peev xwm tiv thaiv kev cuam tshuam raws li tus qauv hauv ntau zaus ntawm 150kHz txog 30MHz. Piv txwv li, ib qho oximeter siv photodiodes los tsim cov khaubncaws sab nraud povtseg thiab optimize filtering circuits, txo cov teeb liab yuam kev los ntawm electromagnetic cuam tshuam los ntawm 3% mus rau 0.2%.
3, Environmental Adaptability Design: Hais txog cov teeb meem hauv kev kho mob
Kev siv ib puag ncig ntawm cov cuab yeej kho mob yog qhov nyuaj thiab muaj ntau haiv neeg, thiab diodes yuav tsum muaj cov hauv qab no adaptability:

Kev tiv thaiv hluav taws xob: Hauv cov khoom siv hluav taws xob kho hluav taws xob lossis kev kuaj xyuas tshuaj nuclear, diodes yuav raug rau gamma rays lossis neutron hluav taws xob ib puag ncig. Los ntawm kev qhia txog qib tob impurities xws li kub thiab platinum los tsim hluav taws xob hardening cov qauv, cov hluav taws xob puas ntawm cov cuab yeej tuaj yeem nce mus rau 100kRad (Si), ua tau raws li kev kho mob.
Biocompatibility: Cov khoom siv uas nkag mus rau hauv tib neeg lub cev, xws li hnav lub plawv ntsuas ntsuas thaj ua rau thaj, yuav tsum ua raws li ISO 10993 biocompatibility txuj. Qee cov chaw tsim khoom siv cov khoom ntim tshuaj kho mob qib epoxy resin los xyuas kom meej tias lub diode tsis tso cov hlau hnyav thaum ntub hauv hws, tsis txhob muaj kev pheej hmoo ntawm kev ua xua ntawm daim tawv nqaij.
Tsawg zog noj thiab siab rhiab heev: Portable kho mob li (xws li handheld ultrasonic li) yog rhiab heev rau lub hwj chim noj ntawm diodes. Los ntawm optimizing PN hlws ris doping concentration thiab txo cov substrate thickness, ib yam ntawm cov photodiode muaj peev xwm tswj tau 90% quantum efficiency thaum txo cov kev khiav hauj lwm tam sim no los ntawm 10mA mus rau 2mA, ho expanding lub ntaus ntawv lub roj teeb lub neej.
4, Kev tswj xyuas kev tswj xyuas thiab cov ntaub ntawv - tau tsav kev ua kom zoo
Txawm tias cov diodes uas tau dhau qhov kev sim nruj kuj tseem ua tsis tiav vim kev ntxhov siab ib puag ncig lossis kev tsim khoom tsis raug thaum lub sijhawm siv sijhawm ntev -. Yog li ntawd, cov kws tsim khoom siv kho mob yuav tsum tsim kom muaj kev tswj hwm lub neej tag nrho:

Kev tiv thaiv kev saib xyuas: Lub sijhawm saib xyuas qhov tseem ceeb ntawm cov diodes (xws li qhov tsaus ntuj tam sim no thiab kev ua haujlwm) los ntawm kev tsim- hauv cov sensors, ua rau muaj kev ceeb toom thaum cov ntaub ntawv sib txawv ntawm cov nqi siv los ntawm 10%. Piv txwv li, ib qho kev ntsuam xyuas ntshav tau txais "dual diode redundancy design", uas tau hloov mus rau cov channel thaub qab thaum qhov kev ua tau zoo ntawm cov ntsiab lus tseem ceeb ntawm cov khoom siv txo qis, tsis txhob cuam tshuam kev cuam tshuam.
Kev soj ntsuam tsis tiav: Sau cov qauv diode tsis ua haujlwm los ntawm cov cuab yeej kho kho mob, thiab nrhiav lub hauv paus ua rau tsis ua hauj lwm (xws li hlau tsiv teb tsaws, oxide txheej tawg) los ntawm kev tshuaj ntsuam electron microscopy (SEM), lub zog dispersive X-ray spectroscopy (EDX), thiab lwm yam. Raws li kev txheeb xyuas ntawm 100000 cov ntaub ntawv tsis ua haujlwm, qee qhov chaw tsim khoom pom tias 80% ntawm kev ua tsis tiav thaum ntxov yog tshwm sim los ntawm cov txheej txheem ntim khoom tsis raug. Yog li ntawd, qhov vuam kub nkhaus tau ua kom zoo kom txo tau qhov ua tsis tiav thaum ntxov los ntawm 75%.
Kev txawj ntse calibration: siv tshuab kev kawm algorithms los dynamically them rau diode kev ua tau zoo. Piv txwv li, qee qhov endoscopic imaging system tsim cov qauv ntsuas kub los ntawm kev txheeb xyuas cov ntaub ntawv keeb kwm, kom qhov ci ntsa iab ntawm cov duab fluctuates tsawg dua 5% nyob rau hauv thaj tsam ntawm -20℃mus rau 50 degree, ua kom pom tseeb qhov kev phais pom.