Anti-deformation installation ntawm cov ntawv luam tawm Circuit Board Cheebtsam

1. Nyob rau hauv lub reinforcement thav duab thiab PCBA installation, PCBA thiab chassis installation txheej txheem, lub warped PCBA los yog warped reinforcement thav duab kev siv ncaj qha los yog yuam installation thiab PCBA installation nyob rau hauv lub deformed chassis.Kev txhim kho kev ntxhov siab ua rau muaj kev puas tsuaj thiab tawg ntawm cov khoom ua rau (tshwj xeeb tshaj yog cov ICs siab ceev xws li BGS thiab cov khoom siv saum npoo av), relay qhov ntawm ntau txheej PCBs thiab cov kab txuas sab hauv thiab cov ntaub qhwv ntawm ntau txheej PCBs.Rau lub warpage tsis tau raws li qhov yuav tsum tau ntawm PCBA los yog reinforced thav duab, tus tsim qauv yuav tsum koom tes nrog cov kws kho mob ua ntej installation nyob rau hauv nws cov hneev nti (twisted) qhov chaw coj los yog tsim "pad" zoo ntsuas.

2. Kev tshuaj xyuas

ib.Ntawm cov chip capacitive Cheebtsam, qhov tshwm sim ntawm qhov tsis xws luag hauv ceramic nti capacitors yog siab tshaj, feem ntau yog cov hauv qab no.

b.PCBA nyo hau thiab deformation tshwm sim los ntawm kev ntxhov siab ntawm cov hlua hlau txuas.

c.Flatness ntawm PCBA tom qab soldering yog ntau dua 0.75%.

d.Asymmetric tsim ntawm ncoo ntawm ob kawg ntawm ceramic nti capacitors.

e.Cov ntaub ntawv siv hluav taws xob nrog lub sij hawm soldering ntau dua 2s, qhov kub ntawm qhov kub siab tshaj 245 ℃, thiab tag nrho cov sij hawm soldering tshaj tus nqi teev ntawm 6 zaug.

f.Sib txawv thermal expansion coefficient ntawm ceramic nti capacitor thiab PCB khoom.

g.PCB tsim nrog kho qhov thiab ceramic nti capacitors ze rau ib leeg ua rau muaj kev ntxhov siab thaum fastening, thiab lwm yam.

h.Txawm hais tias cov ceramic nti capacitor muaj tib lub ncoo loj ntawm PCB, yog tias tus nqi ntawm cov khoom siv ntau dhau, nws yuav ua rau kom muaj zog tensile ntawm lub nti capacitor thaum lub PCB khoov;Qhov tseeb ntawm solder yuav tsum yog 1/2 mus rau 2/3 ntawm qhov siab ntawm qhov kawg ntawm lub nti capacitor

i.Txhua yam khoom siv sab nraud lossis thermal stress yuav ua rau cov kab nrib pleb hauv ceramic nti capacitors.

• Cov kab nrib pleb tshwm sim los ntawm extrusion ntawm lub mounting tuaj tos thiab qhov chaw lub taub hau yuav tshwm nyob rau saum npoo ntawm cov khoom, feem ntau yog ib puag ncig los yog ib nrab lub hli zoo li tawg nrog ib tug kev hloov nyob rau hauv cov xim, nyob rau hauv los yog ze rau qhov chaw ntawm lub capacitor.
• Kev tawg tshwm sim los ntawm kev teeb tsa tsis raug ntawm covxaiv thiab tso tshuabtsis muaj.Lub taub hau-thiab-qhov chaw ntawm lub mounter siv lub tshuab nqus tsev vacuum los yog qhov chaw clamp los tso rau hauv qhov chaw, thiab ntau Z-axis downward siab tuaj yeem ua rau cov khoom siv ceramic.Yog hais tias lub zog loj txaus siv rau qhov tuaj tos thiab tso lub taub hau ntawm qhov chaw uas tsis yog qhov chaw nruab nrab ntawm lub cev ceramic, qhov kev ntxhov siab uas siv rau lub capacitor yuav loj txaus ua rau cov khoom puas.
• Kev xaiv tsis raug ntawm qhov loj ntawm cov nti xaiv thiab qhov chaw lub taub hau tuaj yeem ua rau tawg.Ib txoj kab uas hla me me thiab qhov chaw lub taub hau yuav mloog zoo rau qhov kev tso kawm ntawm qhov chaw, ua rau cov cheeb tsam me me ceramic nti capacitor raug kev ntxhov siab ntau dua, ua rau tawg tawg ceramic nti capacitor.
• Cov nyiaj tsis sib xws ntawm cov solder yuav tsim cov kev ntxhov siab tsis sib xws ntawm cov khoom, thiab ntawm ib qho kawg yuav ntxhov siab thiab tawg.
• Lub hauv paus ua rau cov kab nrib pleb yog qhov porosity thiab tawg ntawm cov txheej ntawm ceramic nti capacitors thiab ceramic nti.

3. Kev ntsuas ntsuas.

Txhim khu kev tshuaj ntsuam ntawm ceramic nti capacitors: Cov ceramic nti capacitors raug tshuaj xyuas nrog C-hom scanning acoustic microscope (C-SAM) thiab scanning laser acoustic microscope (SLAM), uas tuaj yeem tshuaj xyuas cov khoom siv ceramic tsis zoo.